What Is Marine Debris?
24 Dec, 2024
Our oceans are filled with items that do not belong there. Huge amounts of consumer plastics, metals, rubber, paper, textiles, derelict fishing gear, vessels, and other lost or discarded items enter the marine environment every day, making marine debris one of the most widespread pollution problems facing the world's oceans and waterways.
Marine debris is defined as any persistent solid material that is manufactured or processed and directly or indirectly, intentionally or unintentionally, disposed of or abandoned into the marine environment or the Great Lakes. It is a global problem, and it is an everyday problem.
There is no part of the world left untouched by debris and its impacts. Marine debris is a threat to our environment, navigation safety, the economy, and human health.
Most of all, marine debris is preventable.
Types
Anything man-made, including litter and fishing gear, can become marine debris once lost or thrown into the marine environment. The most common materials that make up marine debris are plastics, glass, metal, paper, cloth, rubber, and wood.
Glass, metal, and rubber are similar to plastic in that they are used for a wide range of products. While they can be worn away - broken down into smaller and smaller fragments - they generally do not biodegrade entirely. As these materials are used commonly in our society, their occurrence as marine debris is overwhelming.
Sources
Debris typically comes from both land-based and ocean-based sources. Plastics are used in many aspects of daily life and are a big part of our waste stream. Derelict fishing gear refers to nets, lines, crab/shrimp pots, and other recreational or commercial fishing equipment that has been lost, abandoned, or discarded in the marine environment. Thousands of abandoned and derelict vessels litter ports, waterways and estuaries, creating a threat to navigation, recreation, and the environment.
Movement
How does marine debris move and where does it go? Wind, gyres, and ocean currents all impact how marine debris gets around. Floatable marine debris items, once they enter the ocean, are carried via oceanic currents and atmospheric winds. Factors that impact currents and winds, such as El Niño and seasons, also affect the movement of marine debris in the ocean. Debris items can be carried far from their origin, which makes it difficult to determine exactly where an item came from. Oceanic features can also help trap items in debris accumulation zones, often referred to in the media and marine debris community as “garbage patches.”
Impacts
Wildlife entanglement and ingestion, economic costs, and habitat damage are some impacts of marine debris.
Economic Loss
Marine debris is an eyesore along shorelines around the world. It degrades the beauty of the coastal environment and, in many cases, may cause economic loss if an area is a popular tourist destination. Would you want to swim at a beach littered in trash? Coastal communities may not have the resources to continually clean up debris.
Habitat Damage
Marine debris can scour, break, smother, and otherwise damage important marine habitat, such as coral reefs. Many of these habitats serve as the basis of marine ecosystems and are critical to the survival of many other species.
Wildlife Entanglement and Ghostfishing
One of the most notable types of impacts from marine debris is wildlife entanglement. Derelict nets, ropes, line, or other fishing gear, packing bands, rubber bands, balloon string, six-pack rings, and a variety of marine debris can wrap around marine life. Entanglement can lead to injury, illness, suffocation, starvation, and even death.
Ingestion
Many animals, such as sea turtles, seabirds, and marine mammals, have been known to ingest marine debris. The debris item may be mistaken for food and ingested, an animal's natural food (e.g. fish eggs) may be attached to the debris, or the debris item may have been ingested accidentally with other food. Debris ingestion may lead to loss of nutrition, internal injury, intestinal blockage, starvation, and even death.
Vessel Damage and Navigation Hazards
Marine debris can be quite large and difficult to see in the ocean, if it's floating below the water surface. Encounters with marine debris at sea can result in costly vessel damage, either to its structure or through a tangled propeller or clogged intake.
Alien Species Transport
If a marine organism attaches to debris, it can travel hundreds of miles and land on a shoreline where it is non-native. Invasive species can have a devastating impact on local ecosystems and can be costly to eradicate.
Corals
Marine debris, especially large and heavy debris, can crush and damage coral.
Commercial Fishing Causing Collapse
23 Dec, 2024
The majority of the world's fisheries are in a state of collapse. Too many boats are chasing too few fish. Many of the fish species currently in decline serve as important food sources for sea animals who, unlike humans, have no other food choices. In the Bering Sea, the effects of overfishing on marine animals are obvious. Fur-seal populations have not increased despite a long-standing ban on commercial hunting. The number of Steller's sea lions, which feed mostly on pollack (the number one ingredient in frozen fish sticks and served by fast food chains), has plunged 80% since the 1970s, and seabirds such as the red-legged kittiwake are also in trouble.Modern fishing techniques have enabled humans to catch more fish than ever before, and the once seemingly abundant ocean is now being stripped of life.
In addition to the vast numbers of target fish being caught by today's fishermen, there are also non-target casualties. "Bycatch" is the name that fisheries have given to sea life that is caught, yet not wanted at the time. Bycatch may include dolphins, sea turtles, sea birds, starfish, or even commercially valuable fish not sought by a particular vessel.
DAMAGING FISHING TECHNIQUES
FACTORY TRAWLERS
These are industrial fishing vessels with large-mouthed nets wide enough to encompass three Statues of Liberty lined up end to end. Upon being cast into the ocean, these nets catch just about everything they touch. "Trawling" and "trolling" are sometimes confused, but trolling refers to a vessel towing bait near the surface of the water. With trawling, for every pound of commercial catch, 10 to 20 pounds of bycatch is caught and discarded as waste. As the huge nets drag across the sea floor, they not only capture sea creatures, they literally clear-cut the ocean floor, grinding up coral reefs and other habitats. By removing the organisms that provide shelter for little fish, trawling is not only breaking the food chain, but may also be the underlying cause of the recent collapse of many commercial groundfish stocks, which include cod, haddock, pollock and flounder.
LONGLINES
These are fishing lines up to 80 miles long, which carry several thousand baited hooks at a time. These may catch swordfish, sablefish and sometimes tuna. Frequently, longlines catch other sea animals including sharks and sea birds. Worldwide, an estimated 180,000 birds die on longline hooks each year. Scientists agree that longline fishing severely impacts at least 13 seabird species, 3 of which are globally threatened with extinction. About 10% of the world's wandering albatross population is killed each year by longlines. Sharks have also been severely impacted by longline fishing, often killed just for their fins to be used in soup. Sharks have slow growth and reproductive rates, which makes them particularly vulnerable to overfishing.
PURSE SEINE
These vessels will surround a school of fish with a large net, which is closed off at the bottom with a cable. This technique can trap an entire school of tuna as well as other fish. In the Eastern Pacific, yellow fin tuna often travel with dolphins (for reasons yet unknown), who are vulnerable to entanglement in purse seines if herded and encircled by the net.
MARINE MAMMAL CONFLICTS
Many marine mammals eat the same fish that humans do. In the past, subsistence cultures that fished only to meet the needs of their villages had few conflicts with marine mammals. Today, commercial fisheries strive to profit by catching as many fish as possible, while marine mammals are perceived as competition. The fish that these marine mammals eat to survive is considered lost industry profit. Too often, many marine mammals become scapegoats for declining fish stocks and are harassed or killed. Other times, certain types of fishing gear inadvertently harms non-target marine mammals.
SEALS & FISHERY CONFLICTS
Fishermen claim that seals are a costly menace, because they damage nets and eat or wound fish that "belong" to the fishermen. Despite the fact that most of the world's fisheries are in trouble due to overfishing, fisheries mismanagement, and pollution, fishermen routinely blame seals for reduced catches. Complaints by fishermen often lead to seal slaughters or "culls," which are crude and cruel attempts to boost fishery yields. However, there is little scientific evidence that seal slaughters help replenish fish stocks. In fact, removing large numbers of seals may actually hurt fish stocks, as other animals usually eaten by seals also eat commercial fish or compete with them for the same food. Additionally, fish eaten by seals account for only a small proportion of the fish that are removed from the marine environment. In some cases, fishermen remove 25 times more than seals, while other fish may eat 30 times more.
OTTERS & SHELLFISH
To stay warm in the North Pacific's cool waters, a 50-pound adult otter will consume a quarter of its body weight each day, which equates to roughly 16 pounds of crab, lobster, urchins, oysters and clams. The shellfish industry of Southern California owes its success to the near eradication of the sea otter by fur traders almost 100 years ago. As the sea otter population is slowly recovering and has begun to reclaim its native range, the shellfish industry has pushed for the enforcement of "otter-free zones." These zones are created when otters are removed from their rightful place in the ecosystem, and relocated to less productive areas where fishermen, and subsequently otters, have little interest. Sea otter relocation efforts are doomed to fail, as otters cannot recognize the invisible line that surrounds an "otter-free zone." Once relocated, otters fail to thrive. Relocation not only disrupts the sea otter social structure, but it increases food competition and causes territorial disputes, which ultimately results in more otter deaths.
DOLPHINS & TUNA
Some species of tuna swim with dolphins. This special relationship has led to the depletion of both species, as fishermen locate tuna by looking for leaping dolphins. Scientists have confirmed that chasing and netting dolphins causes harm to their populations and suppresses their recovery. In 1986, before the original "dolphin safe" law went into effect, 133,000 dolphins were reported killed because of tuna fishing. In 1988, thanks to strict guidelines that prohibited the netting of dolphins, deaths were reported at less than 2,000. But in 1999, dolphin protection took a huge step backward. New guidelines have rendered the label meaningless, as tuna companies that encircle dolphins with huge nets are now allowed to label their tuna as "dolphin safe." Tuna are also in trouble from commercial fishing. Within the next few decades, blue fin tuna are expected to reduce to 10% of their historic range. Most blue fin on the market today are juveniles, as nearly all of the adults have been caught. Bigeye, yellowfin and albacore tuna populations are also declining.
SEA TURTLES & SHRIMP
All but one of the eight species of sea turtles are listed on the U.S. Endangered Species List, and all are protected under Appendix I of the Convention on International Trade in Endangered Species (CITES). Despite this protection, it is estimated that worldwide 155,000 sea turtles drown in shrimp nets each year -- many in U.S. waters. "Turtle-Safe" shrimp is caught with Turtle Excluder Devices (TEDs), which attach to shrimp nets and allow turtles to escape. While sea turtle drownings are almost entirely eliminated by the use of TEDs and are required in U.S. waters, some fishermen disable them because they mistakenly believe that TEDs reduce shrimp catches. Shrimp that is imported to the U.S. is also supposed to be caught with TEDs, however, regulation and compliance of foreign vessels is very questionable. And unfortunately, while TEDs may help protect sea turtles, they are unable to remedy the devastating damage that shrimp nets cause as they drag across the sea floor, destroying critical habitat and food sources for sea turtles and other sea life.
WHAT YOU CAN DO
Eliminate or decrease fish from your diet.
Support legislation that sets strict standards for commercial fishing.
Urge National Parks, National Marine Sanctuaries and National Wildlife Refuges to prohibit commercial and recreational fishing within their boundaries.
If you witness a marine mammal being harassed by fishermen or injured by fishing gear, contact the National Marine Fisheries Service. The toll-free, national phone number for the enforcement division is 1-800-853-1964.
If you witness any other wild animals (ducks, geese, raccoons, etc.) being harassed by fishermen or injured by fishing gear, call your state Fish and Wildlife or Fish and "Game" department listed in the Government section of your local phone book.
When visiting a beach, lake or river, pick up any discarded fishing gear that you see and dispose of it properly.
Mountain Shapes & Why They Matter
22 Dec, 2024
People commonly perceive mountains as pyramid-shaped masses that steadily narrow as they slope upward. But researchers have found they actually have four principal shapes. Not only are pyramid-shaped mountains in the minority, but most ranges increase in area at higher elevations. Besides reshaping the mountains in our mind's eye, these findings could lead scientists to reconsider conservation strategies for mountain species.
The four principal shapes of mountain ranges include: diamond, pyramid, inverted pyramid and hourglass. For all the range shapes except pyramid, land availability can be greater at higher elevations than it is farther down the mountainside. Yet, people's idea that land area steadily shrinks as a mountain rises is so entrenched that it has come to guide conservation plans and research. This needs to change.
A majority of mountain ranges studied (39 percent), such as the Rocky Mountains, are diamond-shaped. This means that land-area increases from the bottom until the mid-elevation range before contracting quickly. Hourglass-shaped mountain ranges such as the Himalayas make up 23 percent of ranges. Land area in these types rises slightly then decreases at mid-elevations before increasing sharply at higher elevations. The nearby Kunlun Mountains of China are representative of the 6 percent of ranges worldwide that take the form of inverse pyramids which gradually expand in area as elevation increases before, like the hourglass ranges, suddenly widening toward their peaks.
As mountain species move to higher elevations to escape rising global temperatures, they are expected to face a consistent loss of territory – as well as an increase in resource competition. That all but ensures their eventual extinction. But while this risk exists in pyramid-shaped ranges, many species in other range types might in fact benefit from seeking higher altitudes if they move to an elevation with more land area than the one they left.
Research is needed to more precisely identify those elevation zones where species will encounter territory losses and potentially become more threatened as they move upward. The limited resources that exist for conservation could then be targeted to those species.
Animals that could benefit from an increase in elevation may still face other threats – habitat loss, food availability and exposure to existing animals and diseases, for instance. Even the range shapes themselves provide unique areas of concern. Hourglass-shaped ranges such as the Himalayas present a "bottleneck" at mid-elevation that could become overwhelmed with species moving upslope from more expansive lower elevations.
Not every elevation holds equal value for limited conservation resources. Some gradients, and some portions of gradients, will be more important than others. Protecting land within an elevational bottleneck, for example, is critical. That is where species will be greatly pressured, and often long before they reach the mountaintop.
Trouble For Lemurs
21 Dec, 2024
Deep in the mountainous rainforests of Madagascar, a furry brown and white creature leaps from tree to tree. As it moves high above your head, you notice that two smaller creatures cling to it. You are witnessing the travels of a lemur and her babies. This lemur is called the Milne-Edwards Sifaka. You are lucky because this kind of lemur may be harder to find in the future. That’s because climate change is making it difficult for some lemur mothers to care for their offspring.
Lemurs are a kind of primate. Primates are animals like monkeys, apes, and even humans. This specific kind of primate lives in only one place—the island of Madagascar. Many lemurs, including the Milne-Edwards Sifaka, live in the lush rainforests that are scattered throughout this island. These rainforests are obviously pretty wet. That doesn’t mean they are protected from the effects of climate change, though.
Lemurs are accustomed to regular patterns of rain. Plants take in water from the rain. Sifakas eat these plants to get the water they need to survive. But as Earth’s climate warms, rain patterns are changing. Sometimes the lemurs do not get as much water as they’d like. Lemur moms need that water even more. They make milk from the water and nutrients in the plants they eat. Without this milk, it is difficult to raise a baby lemur.
Scientists have noticed that when there is less rain, fewer babies survive. In dry years, the sifakas have to eat more plants to get the same amount of water that they would in normal years. That means a whole lot of chewing. Scientists think that older sifaka moms have trouble chewing enough plants to make milk for their babies because their teeth are worn out.
In dry seasons, the older sifaka moms may simply be unable to eat enough plants to produce the milk their babies need. Scientists think this lack of milk could be the reason that fewer babies survive dry times. This is a real problem because as the climate changes, there are going to be more and more dry periods in the rain forests.
These sifakas and their difficulties may alert other scientists studying primates in other rainforests to watch for similar problems. Studying rainforests and the animals that live in them is an important job. Without these dedicated scientists, sifakas and other rainforest animals might die out. Thanks to these scientists, they may have a fighting chance.
Bringing Back Predators
20 Dec, 2024
Being at the top of the food chain is no guarantee of a species survival. Not only are many of these so-called apex predators susceptible to human impacts, they also are slow to recover from them, which makes these animals vulnerable despite their high-ranking ecosystem status.
Ecologists and conservation biologists have repeatedly sounded the alarm about the global decline of apex predators — a group that includes gray wolves, spotted owls, bald eagles, cheetahs, killer whales and sea otters. However, restoration practitioners have met with limited success despite major efforts to recover some of the world’s most charismatic megafauna.
Recovery of apex predators is key because they often provide fundamental services such as disease regulation, the maintenance of biodiversity, and carbon sequestration. To recover apex predators, we must first appreciate that the pathway to predator recovery may differ markedly from the pathway predators initially followed to decline.
New research, conducted by Adrian Stier at UC Santa Barbara’s National Center for Ecological Analysis and Synthesis, examines the big picture with regard to predator and ecosystem recovery. Stier worked on the study with colleagues at the National Oceanic and Atmospheric Administration, Oregon State University and University of Florida. The scientists’ comprehensive literature review revealed that full recovery of apex predator populations is currently the exception rather than the rule. In addition to well-known considerations, such as continued exploitation and slow life histories of these species, several under appreciated factors complicate predator recoveries.
Not all predator species are equivalent, so we need to tailor successful recovery strategies based on how these animals are connected to the surrounding ecosystem. The ‘when’ is just as important as ‘what’ with respect to timing predator recoveries. This means designing adaptive sequences of management strategies that embrace key environmental and species interactions as they emerge.
A good example of a successful restoration project is the reintroduction of wolves to the ecosystem in and around Yellowstone National Park. However, reintroducing wolves has not recreated an ecosystem that looks the same as it did pre-1920 when wolves were abundant. While wolves have contributed to a reduced elk population in recent years, lower elk numbers have not been sufficient to restore willows, the region’s dominant woody vegetation on which elk and other animals feed. This in turn has likely limited the recovery of the beaver population, which uses willow as building material for dams in small streams.
Sometimes just reintroducing a species isn’t enough. An ecosystem can morph into a different-looking system that can be relatively stable, and adding in these top predators doesn’t necessarily cause that system to recover back into its original state.
Then again, that may not always be the ultimate goal. Researchers point out that the recovery of apex predators isn’t always well-received, and reintroducing them in an artificial way can be controversial.
Conservation needs can be balanced. We have the opportunity to identify efficient win-win solutions that offer dual prosperity to these majestic carnivores and the human systems within which they are embedded.
What Are Kelp Forests?
19 Dec, 2024
Kelp forests grow predominantly on the Pacific Coast, from Alaska and Canada to the waters of Baja California. Tiered like a terrestrial rainforest with a canopy and several layers below, the kelp forests of the eastern Pacific coast are dominated by two canopy-forming, brown macroalgae species, giant kelp (Macrocystis pyrifera) and bull kelp (Nereocystis leutkeana).
Conditions Required for Growth
Kelp forests grow along rocky coastlines in depths of about 2 m to more than 30 m (6 to 90+ ft). Kelp favors nutrient-rich, cool waters that range in temperature from 5o to 20o C (42o to 72o F). These brown algae communities live in clear water conditions through which light penetrates easily.
Kelp recruits most successfully in regions of upwelling (regions where the ocean layers overturn, bringing cool, nutrient-rich bottom waters to the surface) and regions with continuously cold, high-nutrient waters. Because the amount of dissolved inorganic nitrogen decreases significantly in marine waters warmer than 20oC, kelp experiences reduced or negative growth rates in warm water.
Kelp survival is positively correlated with the strength of the substrate. The larger and stronger the rock on which it is anchored, the greater the chance of kelp survival. Winter storms and high-energy environments easily uproot the kelp and can wash entire plants ashore.
Unique Characteristics of Kelp Plants
Instead of tree-like roots that extend into the substrate, kelp has "anchors" called holdfasts that grip onto rocky substrates. From the holdfasts, kelp plants grow toward the water's surface. Gas bladders called pneumatocysts, another unique feature of kelp, keep the upper portions of the algae afloat. A giant kelp plant has a pneumatocyst at the base of each blade. In contrast, a bull kelp plant has only one pneumatocyst that supports several blades near the water's surface.
Giant kelp is a perennial (it lives for several years) while bull kelp is an annual (it completes its life cycle in one year). Both types of kelp have a two-stage life cycle. They exist in their earliest life stages as spores, released with millions of others from the parent kelp, the sporophyte. The spores grow into a tiny male or female plant called a gametophyte, which produces either sperm or eggs. After fertilization occurs, the embryos may grow into mature plants (sporophytes), completing the life cycle.
Giant kelp can live up to seven years. Factors such as the severity of winter storms may affect its life span. Its average growth (in spring) is 27 cm/day (~10 inches/day), yet it may grow up to 61 cm/day (2 ft/day). The average growth of bull kelp is 10 cm/day (~4 inches/day).
The Kelp Forest Ecosystem
A host of invertebrates, fish, marine mammals, and birds exist in kelp forest environs. From the holdfasts to the surface mats of kelp fronds, the array of habitats on the kelp itself may support thousands of invertebrate individuals, including polychaetes, amphipods, decapods, and ophiuroids.
California sea lions, harbor seals, sea otters, and whales may feed in the kelp or escape storms or predators in the shelter of kelp. On rare occasions gray whales have been spotted seeking refuge in kelp forests from predatory killer whales. All larger marine life, including birds and mammals, may retreat to kelp during storms or high-energy regimes because the kelp helps to weaken currents and waves.
Perhaps the most familiar image of kelp forests is a picture of a sea otter draped in strands of kelp, gripping a sea urchin on its belly. Both sea otters (Enhydra lutris) and sea urchins (Strongylocentrotus spp.) play critical roles in the stable equilibrium ecosystem. Sea urchins graze kelp and may reach population densities large enough to destroy kelp forests at the rate of 30 feet per month. Urchins move in "herds," and enough urchins may remain in the "barrens" of a former kelp forest to negate any attempt at regrowth. Sea otters, playing a critical role in containing the urchin populations, prey on urchins and thus control the numbers of kelp grazers.
Why The Ocean Is Important
6 Dec, 2024
We live on land, but our world is a water world. The ocean covers 70% of Earth's surface. The average depth of the ocean is about 2.7 miles. In some places, the ocean is deeper than the tallest mountains are high. The ocean contains about 97% of all the water on Earth.
The ocean plays a starring role in whatever happens with the environment. One big part of its role is to soak up energy (heat) and distribute it more evenly around the Earth. Another part is to soak up CO2.
In the ocean, all creatures depend on the supply of plankton (tiny plants and animals) at the bottom of the food chain.
The ocean does an excellent job of absorbing excess heat from the atmosphere. The top few meters of the ocean stores as much heat as Earth's entire atmosphere. So, as the planet warms, it's the ocean that gets most of the extra energy. But if the ocean gets too warm, then the plants and animals that live in it must adapt—or die.
Algae and plankton are at the bottom of the food chain. Plankton includes many different kinds of tiny animals, plants, or bacteria that just float and drift in the ocean. Other tiny animals such as krill (sort of like little shrimp) eat the plankton. Fish and even whales and seals feed on the krill. In some parts of the ocean, krill populations have dropped by over 80 percent. Why? Krill like to breed in really cold water near sea ice. What would happen if there were no sea ice? What would happen if there were very little plankton or krill? The whole food web could come unraveled.
Coral is another ocean creature in trouble. Coral is a very fragile animal that builds a shell around itself. It lives in harmony with a certain kind of colorful algae. The algae make food using sunlight, a process called photosynthesis. They share the food with the coral, and, in turn, the coral gives the algae a safe and sunny place to live. The two of them get along fine, living in clean, clear, shallow waters where the sun shines through brightly. Fish love coral too, because there are lots of nooks and crannies for them to hide in.
But the algae cannot carry out photosynthesis in water that is too warm. The algae either die, or the coral spits it out. Scientists are not sure exactly what happens, but it's bad for the algae, the coral, and the fish. The corals lose their colorful food sources and become weak. This sad event is called coral bleaching, and it is happening on a grand scale in many places around the world.
How does the ocean soak up CO2? The ocean absorbs carbon dioxide from the atmosphere wherever air meets water. Wind causes waves and turbulence, giving more opportunity for the water to absorb the carbon dioxide. Fish and other animals in the ocean breathe oxygen and give off carbon dioxide (CO2), just like land animals. Ocean plants take in the carbon dioxide and give off oxygen, just like land plants. The ocean is great at sucking up CO2 from the air. It absorbs about one-quarter of the CO2 that we humans create when we burn fossil fuels (oil, coal, and natural gas.) If not for the ocean, we'd be in even worse trouble with too much CO2. However, the ocean and everything in it are paying a price. The ocean is becoming more acidic.
What does this mean? Liquids are either acid or alkaline. Each liquid falls somewhere along a scale with acid at one end and alkaline at the other. Normally, ocean water is less acidic than fresh water. Unfortunately, as the ocean absorbs more and more carbon dioxide from the atmosphere, it becomes more acidic. Lemon juice is an example of an acidic liquid. Toothpaste is alkaline. The ocean is slightly alkaline.
However, when the ocean absorbs a lot of CO2, the water becomes more acidic. The alkalinity of the ocean is very important in maintaining a delicate balance needed for animals to make protective shells. If the water is too acidic, the animals may not be able to make strong shells. Corals could also be affected, since their skeletons are made of the same shell-like material.
But besides CO2 there are other greenhouse gases. These include water vapor, methane, nitrous oxide, and ozone. Animal agriculture produces more greenhouse gases than all transportation put together. A staggering 51 percent or more of global greenhouse-gas emissions are caused by animal agriculture, according to a report published by the Worldwatch Institute.
How does the ocean affect the climate? One way the ocean affects the climate is by carrying heat to the north in the Atlantic Ocean. Way up north, cold water in the North Atlantic ocean sinks very deep and spreads out all around the world. The sinking water is replaced by warm water near the surface that moves to the north. Scientists call this the Great Ocean Conveyor Belt. The heat carried north helps keep the Atlantic ocean warmer in the winter time, which warms the nearby countries as well. The "great ocean conveyor belt" refers to the major ocean currents that move warm water from the equator to the poles and cold water from the poles back toward the equator.
Does the salt in the ocean do anything? Fresh water has lower salinity (saltiness) than estuary water, where the ocean water mixes with river water. The ocean itself is most salty of all. The amount of salt in the ocean water also affects currents. Saltier water is heavier than less salty water. When salty ocean water freezes, the ice can no longer hold on to the salt. Instead, the salt mixes with the water below making it saltier and heavier. Glaciers, land ice and icebergs are made of fresh water, so what happens when this ice melts? The Great Ocean Conveyor Belt carries warmer, less salty water from the equator to the poles, and colder, saltier water from the poles back toward the equator. Colder water and very salty water are heavier than warmer water and less salty water.
The water in the North Atlantic sinks because it's cold, but also because it's salty. Being both cold AND salty makes it really heavy, so it can sink very far. But if too much ice melts in the North Atlantic, the water could become less salty. If that happens, what about the Ocean Conveyor Belt? Would it stop warming the North Atlantic?
The Fracking Effect
5 Dec, 2024
When massive volumes of toxic chemicals are pumped deep underground at extreme pressure to fracture ancient rock formations, what could go wrong?
The technique used to extract shale gas from its underground deposits is called hydraulic fracturing or "fracking". Huge amounts of water, sand and thickening agents are injected underground to crack open the rocks beneath which the shale gas is trapped.
Shale is fast replacing oil as a cheaper energy source. Shale is oil and gas found in rock formations. Shale gas output, which was 9.7 trillion cubic feet annually a few years ago, could potentially grow to almost 40 trillion cubic feet by 2040, with the US far surpassing Saudi Arabia as the largest fossil fuels producer of the world. In fact, shale will account for as much as 60 percent of America's total oil and gas output.
While vertical fracking has been around since 1949, the advent of horizontal fracking during the past decade gave shale gas output a major boost. Fracking sites have grown from around 18,000 to almost 25,000 within just a decade. That's almost a 40 percent growth.
Despite the potential economic benefits to be reaped from shale gas, the effects to the environment, wildlife and humans may be devastating. Little is known about its long-term environmental impacts, but its short term impacts are already disturbing.
The fracking process, which uses over 100 chemicals, produces massive amounts of toxic and radioactive waste. It has been known to contaminate drinking water and produce earthquakes. Hazardous pollutants are also released into the air. Fracking wells release methane gas known to trap 87 times more heat than carbon dioxide in the atmosphere.
Thousands of leaks, spills and accidents related to fracking have negatively impacted water quality in rivers, streams and shallow aquifers. Since 1990, the EPA has acknowledged the link between fracking and increased earthquakes.
Fracking has been reported to cause declines in property value, damage to public roads, increased crime and a rise in demand on emergency services. The dangerous chemicals used in fracking are known to cause life-threatening illnesses, including cancer.
In 2015, an EPA draft report revealed more than 150 instances of groundwater contamination due to shale drilling and fracking. Some residents in affected areas even reported being able to light their water on fire due to gas contamination.
There have been instances of fracking water trickling into pastures and streams. In Kentucky’s Acorn Fork Creek, waste water from neighboring sites virtually wiped out almost all aquatic life in parts of the fork. The dead fish were found with lesions on their gills and their livers and spleens badly damaged. The creek was formerly one of the cleanest in the country and billed an Outstanding State Resource Water asset. It is home to an endangered species of bird, the diminutive colorful minnow called blackside dace, which is protected under the the Endangered Species Act (ESA).
A particular method of fracking, called Marcellus Shale Drilling, creates brine in the millions of gallons of water that the process needs. Brine is a solution of salt or sodium chloride in water. The brine causes the creation of TDS (totally dissolved acids) which is perfect for the breeding of golden algae. It was such algae that accounted for the deaths of thousands of fish in Dunkard Creek, Pennsylvania.
Over the past decade, more than 350,000 acres of natural land have been damaged all over America by fracking activity. Whole ecosystems have perished in these places. Each fracking operation needs anywhere between 900 to 1,200 truckloads of materials. 30 acres of forest may also be cleared to make way for a drilling station. The Ohio Environmental Council has already reported disruption to the habits of birds and nocturnal animals caused by such activity.
In California, frenetic fracking activity can pose serious threats to the habitats of creatures like the endangered California condor, the blunt-nosed leopard lizard and the San Joaquin kit fox. Domestic animals like cats and dogs and even horses could come under threat.
On the heels of the Kentucky disaster, the U.S. Fish and Wildlife Service has set the tone for offenders by imposing a penalty of $50,000 for violation of the ESA. There have been cries for even larger fines from conservationists.
While there have been increasing pressures by the fracking companies for new licenses, conservation organizations are urging the government to act soon and ban fracking in and around all wildlife zones. It is hoped that better sense will prevail and the government will act to protect humans, wildlife and ecosystems before it is too late.
Wildlife Sales Fueling Corruption, Terrorism, Wars
4 Dec, 2024
The trafficking of wildlife and their products is one of the most profitable and attractive of all the illicit trades, possibly surpassed only by the trafficking of arms and drugs.
Studies note that several of the most notorious armed insurgent groups and terrorist organizations now derive substantial profits from the illegal wildlife trade to fund their incursions, civil wars, and other acts of violence.
Criminal organizations are systematically exploiting wildlife as a source of financing. The corruption is spreading like a disease – into armies, border guards, police, judiciary, customs officers, embassy personnel, and even state diplomats in several countries, all of whom benefit from and actively facilitate the illegal wildlife trade.
The trade’s attractiveness is largely due to its relative lack of social stigma, small risk of arrest, and the woefully light penalties given to those few brought before the courts. High-value wildlife are particularly attractive to criminal entities because their large scale killing and theft can be done quickly and inexpensively compared to the extraction of other high-value resources such as oil, gas, and most precious metals.
Wildlife products are classic 'lootable resources,' a subset of high-value natural resources that are relatively easy to steal, but particularly challenging to monitor from a crime-management perspective. Other natural resources that fall into this category include alluvial diamonds and gemstones, such as rubies.
Researchers note that not only is the wildlife trade attracting huge profits, an estimated US$20-billion a year, criminologists have found that wildlife now serves a specialized role as “a form of currency” for terrorist and criminal organizations. Because wildlife commodities become the basis for the trade of drugs, ammunition, and humans, and a substitute for cash, the illegal wildlife trade has thus grown into a highly efficient form of money-laundering. Such exchanges appear particularly common among larger, more sophisticated criminal networks and terrorist organizations working across international borders.
Not only has the lucrative nature of the wildlife trade encouraged high-level corruption, and violence surrounding the mass-killing of large charismatic wildlife (such as lions, tigers, elephants, gorillas and rhinos), there is also simultaneously a more ominous dimension. Rebel groups, insurgencies, and terror organizations are now also actively seeking out, capturing, and appropriating the profits of ecotourism enterprises. For example, seizing on the profitability of high-value gorilla tourism, Congolese rebels murdered wildlife officers and captured licensed ecotourism operations only to begin their own to fulfill their economic ends. Similarly in Nepal, Maoist rebels have captured protected areas to begin unlicensed ecotourism and trophy-hunting businesses to attract high-paying tourists.
Ecotourism is central to the tourism products and national economies for nations such as Botswana, Kenya, South Africa, and Tanzania.
We are witnessing unprecedented attacks on wildlife and genuine ecotourism operations by emboldened criminals. Tackling wildlife crime can and must become a priority - not just for the sake of the animals and conservation, but for national security and long-term economic sustainability.
Trafficked wildlife is frequently smuggled under harrowing conditions in which many individuals die in transit. Because global demand for some species exceeds biological capacity, local or total extinctions of some species or sub-species have resulted. For example, several Rhino species or sub-species now face extinction. At risk of extinction due to poaching are also Sun Bears, Clouded Leopards, forest elephants, gorillas, tigers, orangutans, and pangolins, among several other species. To stem this threat conservationists must actively link their knowledge about threatened wildlife to the international development, security, and political concerns with which the wildlife trade has become inextricably conjoined.
Winners & Loosers In The Arctic
3 Dec, 2024
If you're a Bowhead whale and you spend summers in the Arctic—congratulations! Life is good. Your food supply is growing and your waters are warming. Your summer "vacation" lasts a few weeks longer now than it used to (say, back in 1980). That's because there isn't as much sea ice and it doesn't form as early in the fall as it used to.
The sea ice is thinner, too. That's why there's more food for you. The tiny plants you eat, called phytoplankton, grow in the top layer of the ocean. Like all plants, they need sunlight to grow. Since there's less ice, the sunlight can shine through the water better. So, more phytoplankton for you.
Also, you are discovering some of your long-lost relatives. Bowhead whales who live on the Atlantic Ocean side of the Arctic are meeting up with Bowhead whales who live on the Pacific side of the Arctic. You guys have been separated by Arctic ice for eons, but now that a lot of it is melted, you are free to mingle.
You, dear whales, are definitely winners in the warming of the Arctic. But, alas, where there are winners, there are often losers.
Condolences to the polar bears, though. You guys are having a tough time of it with the shrinking ice. Where are you supposed to sit while you eat the meal you have caught in the water? Where can you rest if all the ice chunks are melted? After all, you are not fish that can just live in the water all the time. You are not whales either. You need sea ice to get around, to hunt, to find a mate and, in some areas, to make a den and have cubs.
Of 19 groups of Arctic polar bears, seven are losing members. Scientists don't have enough data yet on several of these groups. However, at the rate the Arctic ice is melting, it's likely that the polar bears will continue to struggle.
Why do we talk so much about the Arctic?
While the overall temperature of Earth is rising, temperatures in the Arctic are rising 2 to 3 times faster than temperatures farther south. This situation is called "Arctic amplification."
Why does this happen?
As you may know, light colors reflect more sunlight than dark colors. That's why people are more comfortable in light-colored clothing in the summer. In the same way, sea ice reflects more sunlight than does the darker ocean. As the sea ice melts, there's less "white" to reflect the sunlight and more "dark" to absorb it. So the ocean gets a little warmer. And more sea ice melts, and the darker water absorbs even more sunlight and heat.
And so it goes, in what scientists call a positive feedback loop, or "vicious circle."
What other living things will be winners or losers in the Arctic?
Scientists are keeping a close watch on conditions in the Arctic. It is a clear indicator of how rapidly Earth's climate is changing.
Mountains: The Last Frontier For Endangered Species
2 Dec, 2024
The threats faced by wildlife around the world continue to increase. Each year, thousands of animal species are lost to extinction. Mountain areas provide one of the last safe havens for endangered plant and animal species. But even these last safe havens are now under threat by irresponsible human activities.
A large number of mammals have taken up homes in mountainous areas. The most cited reason for this is environmental variation, which is the evolution of different species that live in the valleys and mountains. But studies have revealed that the high level of biodiversity in mountains can also be attributed to the protection mountains offer to endangered species. Animals are taking refuge in mountains because we've driven them from other ecosystems.
Mountains provide safety to animals that have come near extinction. But these last safe areas for wildlife are continually faced with a myriad of challenges which include animal agriculture, human development, insufficient water, climatic changes, desertification and declines in biodiversity.
The brown bear once flourished in Asia, North America and Europe. But now they can only be found in mountainous areas due to the threats faced in lowlands. In the past 100 years, only 1% of the entire population of brown bears has survived in the United States.
Pumas, otherwise known as mountain lions, are mostly found in the mountains – especially in the Andes and Rockies. It took its home in these areas primarily due to the threats they face from the activities of man.
Red pandas are mostly found in the Himalayan mountain chain. Even though this region is reasonably inaccessible to humans, the red panda is having a difficult time surviving as bamboo, which it feeds on, continues to be depleted. For the giant panda to survive, three things are important; high mountains with deep valleys, lush bamboo vegetation, and rippling streams – all of which are threatened by human activities.
The golden eagle has its home in the Northern Hemisphere. Like many other endangered species, the number of golden eagles has plummeted due to human actions.
Not only do mountain forests serve as protection for wildlife, but billions of people depend on them for their income. 60% of the world’s fresh water comes from the mountains even though they cover just 12% of the Earth’s surface. The quality and quantity of water supplied to industries and lowland communities is influenced heavily by mountain forests. If there are no forests in the mountains, erosion is bound to occur, leaving the quality of water in jeopardy.
Most cities source their water supply from the mountains. For instance, 95% of Vienna’s water comes from mountain forests of the Northern Alps. Honduras and Tegucigalpa get 40% of their water supply from the cloud forest of La Tigra National Park. 97% of Kenya’s electricity is generated from Mount Kenya using hydroelectric technologies. The Tibetan plateau serves as a water tower for more than 3 billion Asians.
A large amount of carbon in contained in mountain forests. When these mountain forests are lost, a massive amounts of carbon will be released into the atmosphere.
Threats to Mountain Animals
Every day mountain forests continue to face threats from human activities.
Agriculture
As the world’s population continues to increase, farmers are migrating to higher lands, contributing to the depletion of forest life. More than half of Africa’s mountainous areas have been turned into grazing lands. Excessive grazing leads to the destruction of fragile vegetation. 10% is used for growing crops. This practice is unsustainable due to the fact that crops do not do well on highlands. Most mountainous areas are unproductive lands. Only a meager 3% of mountain land is suitable for growing crops.
Development
About 25% of mountain lands across the world have been used for roads, dams, pipelines and mining projects. Every year, billions of minerals are extracted from mountains. Not only does road construction lead to erosion, it also provides easy access to cut down trees.
Warming
Mountain habitats are very susceptible to climatic changes. As glaciers continue to melt, snowcaps are receding. Scientists believe this will eventually lead to a series of landslides which will eventually affect water reserves. As climatic conditions continue to change, there will be an increase in the number of pests which further endanger forest life.
War
Civil wars have a devastating effect on mountain areas. Insurgents base their stations in the mountains. It has been estimated by the United Nations that 67% of African mountain regions have been used for violent activities.
Action Is Needed
Governments have slowly begun to take small steps to reduce forest depletion. National parks are being erected in different parts of the world to conserve some fragile regions and to serve as refuges to endangered species. Although national parks are protected, they are still subject to environmental pressure. The high rate at which animal species are being lost is a clear indication that mountain strongholds are still being attacked by poachers.
Mountains are vital to all life on earth, including humans. What happens on the highest mountain peak affects all life in the lowlands. Lands, freshwaters and even oceans are affected by moutains. Much larger steps must be taken now to save these last wild areas from animal agriculture, development and other human impacts.
Fighting Desertification
1 Dec, 2024
The world's great deserts were formed by natural processes interacting over long intervals of time. During most of these times, deserts have grown and shrunk independent of human activities.
Paleodeserts, large sand seas now inactive because they are stabilized by vegetation, extend well beyond the present margins of core deserts, such as the Sahara. In some regions, deserts are separated sharply from surrounding, less arid areas by mountains and other contrasting landforms that reflect basic structural differences in the regional geology. In other areas, desert fringes form a gradual transition from a dry to a more humid environment, making it more difficult to define the desert border.
These transition zones have very fragile, delicately balanced ecosystems. Desert fringes often are a mosaic of microclimates. Small hollows support vegetation that picks up heat from the hot winds and protects the land from the prevailing winds. After rainfall the vegetated areas are distinctly cooler than the surroundings. In these marginal areas, human activity may stress the ecosystem beyond its tolerance limit, resulting in degradation of the land. By pounding the soil with their hooves, livestock compact the substrate, increase the proportion of fine material, and reduce the percolation rate of the soil, thus encouraging erosion by wind and water. Grazing and the collection of firewood reduces or eliminates plants that help to bind the soil.
This degradation of formerly productive land, desertification, is a complex process. It involves multiple causes, and it proceeds at varying rates in different climates. Desertification may intensify a general climatic trend toward greater aridity, or it may initiate a change in local climate.
Desertification does not occur in linear, easily mappable patterns. Deserts advance erratically, forming patches on their borders. Areas far from natural deserts can degrade quickly to barren soil, rock, or sand through poor land management. The presence of a nearby desert has no direct relationship to desertification.
Unfortunately, an area undergoing desertification is brought to public attention only after the process is well underway. Often little or no data are available to indicate the previous state of the ecosystem or the rate of degradation.
Scientists still question whether desertification, as a process of global change, is permanent or how and when it can be halted or reversed.
Desertification became well known in the 1930's, when parts of the Great Plains in the United States turned into the "Dust Bowl" as a result of drought and poor practices in farming, although the term itself was not used until almost 1950. During the dust bowl period, millions of people were forced to abandon their farms and livelihoods. Greatly improved methods of agriculture and land and water management in the Great Plains have prevented that disaster from recurring, but desertification presently affects millions of people in almost every continent.
Increased population and livestock pressure on marginal lands has accelerated desertification. In some areas, nomads moving to less arid areas disrupt the local ecosystem and increase the rate of erosion of the land. Nomads are trying to escape the desert, but because of their land-use practices, they are bringing the desert with them.
It is a misconception that droughts cause desertification. Droughts are common in arid and semiarid lands. Well-managed lands can recover from drought when the rains return. Continued land abuse during droughts, however, increases land degradation. By 1973, the drought that began in 1968 in the Sahel of West Africa and the land-use practices there had caused the deaths of more than 100,000 people and 12 million cattle, as well as the disruption of social organizations from villages to the national level.
In 1988 Ridley Nelson pointed out in an important scientific paper that off-road vehicles significantly increase soil loss in the delicate desert environment of the western United States. In a few seconds, soils that took hundreds of years to develop can be destroyed.
While desertification has received tremendous publicity by the political and news media, there are still many things that we don't know about the degradation of productive lands and the expansion of deserts. The desertification problem and processes are not clearly defined. There is no consensus among researchers as to the specific causes, extent, or degree of desertification. Contrary to many popular reports, desertification is actually a subtle and complex process of deterioration that may often be reversible.
Global Monitoring
In the last 25 years, satellites have begun to provide the global monitoring necessary for improving our understanding of desertification. Landsat images of the same area, taken several years apart but during the same point in the growing season, may indicate changes in the susceptibility of land to desertification. Studies using Landsat data help demonstrate the impact of people and animals on the Earth. However, other types of remote-sensing systems, land monitoring networks, and global data bases of field observations are needed before the process and problems of desertification will be completely understood.
Local Remedies
At the local level, individuals and governments can help to reclaim and protect their lands. In areas of sand dunes, covering the dunes with large boulders or petroleum will interrupt the wind regime near the face of the dunes and prevent the sand from moving. Sand fences are used throughout the Middle East and the United States, in the same way snow fences are used in the north. Placement of straw grids, each up to a square meter in area, will also decrease the surface wind velocity. Shrubs and trees planted within the grids are protected by the straw until they take root. In areas where some water is available for irrigation, shrubs planted on the lower one-third of a dune's windward side will stabilize the dune. This vegetation decreases the wind velocity near the base of the dune and prevents much of the sand from moving. Higher velocity winds at the top of the dune level it off and trees can be planted atop these flattened surfaces.
Oases and farmlands in windy regions can be protected by planting tree fences or grass belts. Sand that manages to pass through the grass belts can be caught in strips of trees planted as wind breaks 50 to 100 meters apart adjacent to the belts. Small plots of trees may also be scattered inside oases to stabilize the area.
On a much larger scale, a "Green Wall," which will eventually stretch more than 5,700 kilometers in length, much longer than the famous Great Wall, is being planted in northeastern China to protect "sandy lands" deserts believed to have been created by human activity.
More efficient use of existing water resources and control of salinization are other effective tools for improving arid lands. New ways are being sought to use surface-water resources such as rain water harvesting or irrigating with seasonal runoff from adjacent highlands. New ways are also being sought to find and tap groundwater resources and to develop more effective ways of irrigating arid and semiarid lands.
Research on the reclamation of deserts also is focusing on discovering proper crop rotation to protect the fragile soil, and on understanding how sand-fixing plants can be adapted to local environments.
If we are to stop and reverse the degradation of arid and semiarid lands, we must understand how and why the rates of climate change, population growth, and food production adversely affect these environments. The most effective intervention can come only from the wise use of the best earth-science information available.
Environmentalism Begins With Your Fork
27 Nov, 2024
There are many things we can do or not do to help the planet. But did you know you can help save the Earth by going green with your fork? By purchasing plants over meat you can help end the destruction of our soils, forests and oceans, eliminate water and air pollution, and even stop species extinction. Take the plunge into positively changing your life and the lives of billions of people on this planet by choosing a vegan diet.
The raising of the cows, heifers, beef cattle, calves, sheep, lambs, hogs, pigs, goats, horses and poultry not only pollute our bodies but also our environment. The livestock industry, more appropriately referred to as the factory farming industry, is a major player in the devastation of our environment – polluting our air and water while destroying our ecosystems.
Water and Air Pollution
The United Nations reports that raising animals for food generates more greenhouse gases than all the cars and trucks in the world combined. Factory livestock farms are the largest source of water pollution that contributes not only to the degradation of our streams, lakes, rivers and oceans but also to the land. The range of statistical analysis conducted, and the surmountable facts, all point to the cure; going vegan.
Did You Know?
- Factory farming is responsible for 18% of CO2 greenhouse emissions and 64% of ammonia which produces acid rain.
- Switching to a meat-dairy-egg free diet can save 50% more CO2 emissions than driving a Prius.
- Livestock animals produce toxic excrement from the high levels of antibiotics and hormones they are given.
- Cows and sheep account for 37% of the total methane generated.
- Methane is 25 to 100 times more damaging than CO2.
- Cows alone produce approximately 120lbs of manure per day, as many as 20 to 40 humans. And their manure produces about 150 billion gallons of methane per day.
- The overpopulation of animals in theses factories creates unmanageable amounts of waste. It is collected in cesspools and is either sprayed on fields or left to sit. The toxic fumes from the pools are emitted into the air and harm the environment – causing health issues to the people living in those areas.
- In the US 55% of water is consumed by animal agriculture while only 5% is used by households.
- 1 cow drinks up to 50 gallons of water per day. It takes 683 gallons of H2O to make 1 gallon of milk. 2,400 gallons of water are used to make 1lb of beef. 477 gallons are needed to produce 1lb of eggs, and 900 gallons are used in the process of making cheese.
- Runoff water from factory farms and livestock grazing is the leading cause of dead zones in our oceans and eutrophication in our freshwater sources.
Soil Erosion, Deforestation and Habitat Loss
From air and water to land, the business of animal agriculture is destroying our environment. With over 30% of Earth’s landmass being used to raise animals for food – including both grazing and growing feed crops – topsoil erosion, deforestation, habitat loss and species extinction are of major consequence.
Did You Know?
- 70% of the grain grown in the US is used to feed farmed animals.
- 56 million acres of land are used to feed factory farmed animals, while only 4 million acres produce plants for human consumption.
- It takes 20 times less land to feed someone on a plant based diet than it does to feed meat eaters.
- It takes 10lbs of grain to produce 1lb of meat.
- The rapid growth of livestock leads to deforestation, particularly in Latin America. 70% of the Amazon Rainforest has already been destroyed and is now occupied by pastures and feed crops.
- Tropical deforestation and forest clearing have adverse consequences that contribute to climate change, biodiversity loss, reduced timber supply, flooding and soil degradation.
- Unlike sustainable farming systems that work harmoniously with the natural environment by rotating crops to help replace nutrients, unsustainable industrial farming uses one crop that is not rotated which leads to loss of soil fertility.
- Low soil fertility causes farms to continuously move from place to place which leads to deforestation and rapid growth in weeds.
- The use of herbicides to combat weeds and pesticides to eliminate insects both harms the soil fertility and ultimately contaminates our water sources through runoff.
- Land based factory farming has caused more than 500 nitrogen flooded dead zones around the world.
Farmed animals are bred in mass amounts and consumed by masses of humans. The unsustainable ways in which we produce eggs, meat and dairy is a threat not only to public health, but is damaging our environment.
The positive effects of going vegan are limitless and results in significant reductions in climate change, rainforest destruction and pollution of our air, water and land. While one person alone cannot change the consequences that have been placed on our environment, we as a whole can use our knowledge and voices to spread the word that veganism is not just about health but is also about going green by eating green.
Vultures At Risk
26 Nov, 2024
Vultures. Cartoon characters in parched deserts often wish them to disappear, since circling vultures are a stereotypical harbinger of death. In reality, vultures in some parts of the world are in danger of disappearing. And according to recent research, such a loss would have serious consequences for ecosystems and human populations alike.
The primary threat to vultures is the presence of toxins in the carrion they consume. On many continents, vultures are the unfortunate victims of poisoned carcasses — especially impactful because dozens — or even hundreds — of vultures can feast on a single carcass. Populations of most vulture species around the world are now either declining or on the brink of extinction.
Losses of vultures can allow other scavengers to flourish. Proliferation of such scavengers could bring bacteria and viruses from carcasses into human cities.
In 2004, Çağan Şekercioğlu from the University of Utah, published a study examining the respective extinction risks of all bird species throughout the world. He noted then that vultures represented the single most threatened group of birds. More than a decade later, Şekercioğlu and Evan Buechley examined factors affecting the extinction risk of more than 100 bird species, including 22 species of vultures, which eat carrion exclusively, and other scavenging birds that have broader diets. Their results suggest several inherent ecological traits that likely contribute to vultures’ extinction risk, including their large body masses, slow reproductive rates and highly specialized diets. The greatest external threat to vultures, however, is poisoning.
Poisoning
Poisoning is the greatest extinction risk facing vultures, and impacts 88 percent of threatened vulture species. The poisons come in many forms.
In North America, the California condor, a vulture, experienced sharp declines until only 22 individuals remained by 1982. The leading cause of decline? Toxic lead bullet fragments in the gut piles left behind by hunters after animals had been field-dressed. Intensive conservation efforts helped the species to rebound. The condors now number well over 400, and range over large areas of California, Arizona, Utah and Baja California, Mexico.
In the mid-1990s India experienced a precipitous vulture decline, with more than 95 percent of vultures disappearing by the early 2000s. The cause was eventually traced to diclofenac, a veterinary anti-inflammatory drug that relieved pain in cattle, but proved highly toxic to vultures. Hundreds of vultures would flock to each cattle carcass. And if the cow had recently been treated with diclofenac, hundreds of vultures would die. Because of this highly gregarious feeding behavior, less than one percent of cattle carcasses contaminated with diclofenac could account for the steep vulture decline. Fortunately, international cooperation led to a total ban on veterinary diclofenac use. Buechley says the numbers of vultures have stabilized, and are now showing signs of slowly increasing.
Now, the center of the vulture crisis is in sub-Saharan Africa. Potent newly affordable poisons are used to control predatory pests, such as lions or jackals. The poisons are so toxic that they can cascade through ecosystems: birds, mammals and insects are often found littering the area around these poisoned carcasses. But, as the predominant scavenger, vultures take the brunt of the poisoning and face the largest number of casualties. For example, an elephant carcass poisoned in Namibia killed as many as 600 vultures. In other cases, vultures are the victims of poachers who poison carcasses so that vultures do not give away the location of illegally taken animals.
Rise Of The Facultative Scavengers
In vultures’ absence, other scavenger populations increase to take advantage of all of the uneaten carrion. By some estimates, in Central America, South America and Africa, vultures eat more meat than all predators combined. Without vultures, animals that eat carrion as a part of their diet (called facultative scavengers, as opposed to vultures, which eat only carrion) proliferate to take advantage of the available nutrients in a dead carcass.
Crows, rats, dogs — any of these species can suddenly become abundant and dominant, to the point of crowding out the remaining vultures. Hundreds of vultures on a carcass can easily frighten away packs of dogs. But when only a few vultures are left, the dogs can rule.
Such changes in populations of certain animal groups can upset the balance of food webs. All these facultative scavengers are also predators, and so they also go out and eat other organisms, causing a cascading effect.
Human Impacts
The impact of vultures’ declines are not limited to the realm of ecology, however. Vultures are highly efficient consumers of carrion, sometimes locating and consuming carcasses within an hour, before other forms of decay can set in. And vultures’ stomachs are highly acidic, killing nearly all bacteria or viruses that may be present in carrion. Combined with the fact that vultures rarely come in contact with humans, vultures serve as a barrier to prevent diseases from proliferating in dead animals and spreading to humans. Other facultative scavengers are not so adapted, and could pass along those diseases into human populations, as many are already fixtures in cities.
For example, following the decline of vultures, India experienced a strong uptick in feral dogs — by an estimated seven million. The increase in dogs, potentially feeding on disease-ridden carcasses, is thought to have at least partially caused the rabies outbreak that was estimated to have killed 48,000 people from 1992-2006 in India — deaths that may have been avoided if not for the disappearance of vultures.
Members of the Parsi sect of Zoroastrianism experienced a different impact. For thousands of years, the Parsi people have placed their dead on exposed mountaintops or tall towers for vultures to consume. The practice is called “sky burial.” But with few vultures and unable to properly handle their dead, the Parsis experienced a crisis within the faith. Some constructed captive vulture aviaries. Others talked about desiccating bodies using focused solar mirrors. The Parsis’ plight exemplifies the vultures’ role in south Asian society — and the various impacts if the vultures aren’t there.
Learning From The Past
Although the vulture crisis in Africa is ongoing, scientists can predict what the outcome will be, based on previous experiences in India. Crows, gulls, rats and dogs will boom. And the rabies outbreak in India may just be a prologue, because several sub-Saharan Africa countries already have the highest per-capita rabies infection rates in the world. Rabies is only one of the many potential diseases that vultures had helped regulate.
The poisoning that is killing vultures is also affecting many other organisms throughout ecosystems. But vultures are the most sensitive canaries in ecological coal mines. The story of the California condor shows that recovery is possible, but at a high cost that countries in the developing world may not be able to pay.
“It’s good news and bad news,” Şekercioğlu says. “It shows that we can bring back these scavengers. But the bad news is that once we get to these numbers, it costs tens of millions of dollars and decades to bring them back. You don’t want to go there. And once you go there, we can afford to save only a few species.”
So, Buechley argues, “the better solution is to invest in vulture conservation here and now, in order to stem incalculable damage from trophic cascades and increased human disease burden in the developing world.”
The Evils Of Ivory
25 Nov, 2024
Continued high demand for illegal wildlife products has greatly endangered many species like elephants, rhinos, and tigers, leaving some facing imminent extinction. The world is experiencing the worst poaching crisis in history, rivaling that in the 1980s, when more than 800 tons of ivory left Africa every year and the continent’s elephant populations plunged from 1.3 million to 600,000. Scientists estimate that only 430,000 African elephants remain today with one elephant killed every 15 minutes for its ivory.
Poaching is at its highest level in decades. Unless the illegal and inhumane slaughter of elephants, rhinos and other species is halted, we will likely see these magnificent animals disappear from the wild in the next several decades.
As one of the world’s most lucrative criminal activities, valued at US$19 billion annually, illegal wildlife trade ranks fifth globally in terms of value, behind the trafficking in drugs, people, oil and counterfeiting. Research shows that domestic ivory markets provides cover for criminals to launder illegal ivory from poached animals, puts the burden of proof on enforcement officers, and confuse consumers, many of whom take market availability of ivory for legality of the trade.
The rapid development of online media has put a lot of wildlife species at risk and has created huge losses for the global ecosystem and human beings, as criminals have used the Internet for secret, fast and convenient communications and transactions. The report Wanted: Dead or Alive, Exposing the Online Wildlife Trade reveals that over 33,000 endangered wildlife and wildlife parts were available for sale online in a short six-week period.
Ivory trade is quickly pushing endangered animals towards extinction. Every year, 25,000-30,000 African Elephants are poached to supply the ivory trade. According to the Elephant Trade Information System (ETIS), in recent years the volume from large-scale ivory seizures has been setting new records. In 2013, enforcement agencies around the world seized 41.6 tons of ivory, representing a 71 percent increase from 2009.
Research shows that for slow-growing, long-living species like the elephant, when mortality rate reaches 6% the population risks crashing. However in many regions of Africa, elephant populations are declining at a rate of 11%-12% because of ivory trade.
The past 15 years has seen soaring market prices for ivory products, largely due to a growing middle class in China and other Asian countries where ivory products have significant cultural value. Most people don't know that the U.S. is also one of the top consumers of ivory.
Enforcement operations are a deterrent to wildlife criminals in and outside of China. To combat global illegal ivory trade, countries are publicly destroying seized ivory. Kenya, Ethiopia, United Arab Emirates, the Republic of Congo and the United States have torched ivory. Public destruction of confiscated ivory, together with vigorous enforcement, raises the cost for engaging in wildlife crime and warns the public about the criminal nature of ivory trade. Such measures help stigmatize ivory consumption and reduce demand.
The U.S. federal government is working to close the loopholes that have allowed the illegal ivory market to flourish. A number of states have also passed ivory bans, including New York, New Jersey and California.
Campaigns to reduce demand for ivory domestically and overseas, and to strengthen international laws and enforcement, have further elevated the issue of wildlife trafficking globally. Collaboration between conservation organizations, government agencies, private organizations and local communities supports on-the-ground initiatives to conserve and manage wildlife through improved anti-poaching patrols, monitoring, habitat management, community-based initiatives and other effective conservation programs.
From African range states, to smuggling transit routes, to consuming countries, actions must be taken on every link of the transnational ivory trade to stop the crisis. Combating illegal ivory trade requires the effort of the whole world.
Chimpanzee Fight For Survival
24 Nov, 2024
Millions chimpanzees once thrived in the forests of 25 different African nations. Today, their populations have been reduced to only 5 nations and their numbers have plummeted to between 150,000 and 300,000. Without immediate action, humans' closest living relative could be lost in only 15 years.
Humans are largely responsible for chimpanzee population declines. In addition to poaching, which plagues areas of Africa, deforesting and farming are quickly eliminating the habitats of chimps.
Legal and illegal logging is rapidly depleting habitat for chimpanzees. Agriculture is stripping away forests at alarming rates. Changes in climate may be the biggest threat of all to chimpanzees. Climate change is expected to wipe out many forest areas in the coming decades.
The Nigerian chimpanzee dwells in jungles along the Nigeria-Cameroon border. Weighing 70 kilos and reaching heights of nearly 6 feet while fully standing, this species is the most endangered of all the chimpanzee species. There are only 1,500 of them left in the Gashaka-Gumti National Park in Nigeria, a forest reserve.
The Eastern chimpanzee is a native of Central African Republic, Democratic Republic of Congo (DRC), Uganda, Rwanda, Burundi, Tanzania and the southern fringes of South Sudan. They also feature in the 2007 IUCN Red List of most endangered species.
Once a sub-Saharan species found in areas far beyond the Niger River, the Western chimpanzee now lives only in the forests of coastal countries of West Africa like Guinea, Sierra Leone, Burkina Faso, Liberia and Ivory Coast. There are about 20,000 to 55,000 individuals, as per the most recent count.
The Central chimpanzee is a native of Central Africa and can be found in the dense equatorial forests of the Congo River Basin in countries of Equatorial Guinea, Gabon and Congo. They are the most populous of all species, with a count of over 100,000 individuals.
The Bonobo, or the pygmy chimpanzee, is found only in the Democratic Republic of the Congo (DRC). Its habitat is ensconced in the southern bank of the powerful Congo River and has lent this species a different set of characteristics from other chimpanzees. It reaches a standing height of just under 4 feet, weighing in the range of 35 to 60 kilos. Bonobos appear distinctly slender when compared to other chimpanzees. There are about 30,000 to 50,000 of these creatures in their exclusive habitat in the equatorial forests of the southern Congo River basin.
Threats to Chimpanzees
Chimpanzees can adapt to both terrestrial and arboreal environments, but prefer dense forests. It is among trees where they are most at home. Chimpanzees are synonymous with trees, which is one reason why it is so essential to protect the forests they live in.
Logging results in the massive loss of forest cover every year. The growing numbers of poor humans are forced to clear forests to sustain themselves, leading to loss of habitat for the chimpanzees. The hardest hit is the Nigerian-Cameroon species that is on the brink of extinction. Many farmers use agriculture techniques that strip the soil of nutrients and quickly render it unusable, requiring more forests to be cleared.
In Tanzania's Gombe National Park, it’s the influx of refugees from strife-torn regions like Rwanda and Burundi that have taken a toll on the forest cover. The 35-sq-km park is not sufficient to cater to the needs of chimpanzees. Since they are large in size, they need more calories from sufficient food intake than such a restricted habitat can provide. This leads them to venture beyond the precincts of the park in search of food. Raiding nearby farms for maize, vegetables, and sometimes fruit, puts them in direct confrontation with man – a situation that has led to the deaths of many apes. Examples like the Gombe National Park have become widespread throughout the continent and heighten the risk for the chimps' survival.
Population pressure and consequential poverty drive many Africans to hunt for chimpanzee meat. Hunger is one reason. The other is the trade in bushmeat (the meat of wild animals as food). A family that has no sustainable income can live off the bushmeat trade, where they can earn anything from $1,000 - $3,000 in a year. This is more so the case in populous West African countries like Nigeria, Cameroon and Senegal.
Recent research reveals that the biggest threat to chimpanzees could come from climate change. Huge forest areas are likely to be wiped out in the next 50 to 60 years. While those dwelling in the deepest rainforests of Central Africa and DPR may somehow survive, habitats of forest areas of lesser expanse, like the Cameroon-Nigerian mountain jungles, are likely to perish.
Like humans, chimpanzees are susceptible to numerous diseases. Ebola and AIDs are no exception. This is one reason why so many of these animals are inhumanely kept in labs as models for biomedical research. Chimpanzees caged in such lab environments suffer from extreme mental stress emanating from boredom, confinement, and fear of experiments carried out on them.
Chimps may possess numerous traits in common with man, but that does not justify them being made a “pet” or kept in confinement in labs or zoos for man's benefit or entertainment. They must be recognized as creatures of the wild.
We need to conserve our precious forests for the protection of its denizens. Foremost in our minds should be the safeguard of chimpanzees, the most significant link to man's past.
Sea Otters: The Kelp Keystone
23 Nov, 2024
In nature, all living things are in some way connected. Within each community each species depends on one or more of the others for survival. And at the core of individual ecosystems is a creature, or in some cases a plant, known as a keystone species.
This species operates much like a true key stone, which is the stone at the top of an arch that supports the other stones and keeps the whole arch from falling down. When a keystone species is taken out of its environment, the whole system could collapse.
In California's Monterey Bay National Marine Sanctuary the sea otter is a keystone species in the kelp forest ecosystem. Kelp forests provide food and shelter for large numbers of fish and shellfish. Kelp also protect coastlines from damaging wave action. One of the sea otter's favorite delicacies is the sea urchin who in turn loves kelp.
When present in healthy numbers, sea otters keep sea urchin populations in check. But when sea otters decline, urchin numbers explode and grab onto kelp like flies on honey. The urchins chew off the anchors that keep the kelp in place, causing them to die and float away, setting off a chain reaction that depletes the food supply for other marine animals causing their numbers to decline.
By the early 20th century when sea otters were nearly hunted out of existence for their fur, kelp beds disappeared and so did the marine life that depended on kelp. Years later, conservationists moved some remaining otters from Big Sur to Central California. Gradually, their numbers grew, sea urchin numbers declined, and the kelp began to grow again. As the underwater forests grew, other species reappeared.
Protecting keystone species, like sea otters, is a priority for conservationists. Often, the extent of the keystone functions of a species aren't known until the species has been removed from its environment and the ecosystem changes. Rather than wait until it may be too late for the system's health and survival, scientists make every effort to keep an ecosystem working as nature had intended.
Logging: Cutting Down Wildlife Habitats
21 Nov, 2024
Forests are vital for the health and well-being of humans, wildlife, and the Earth. They provide habitat for about two-thirds of all land-dwelling animals and plants. Around the world, these critical ecosystems are being ripped apart as a result of a booming demand for furniture, flooring, lumber, and other building materials. Trees are used to make paper, packaging materials, pencils, fuel for cooking and heat, and other wood-based products. In addition to wood products, logging is also occurring at an alarming rate to make room for animal agriculture and subsistence farming, oil and gas extraction, mining operations, and ever-increasing development. The world's natural forests cannot sustain the increasing global demands of current forest management practices.
Years of irresponsible exploitation have destroyed and degraded much of the planet's forests. Half of the Earth's global forest land has already been lost. In the United States, 90 percent of continental indigenous forests have been removed. Around the world, 15 billion trees are being cut down each year. The destruction of important wildlands is displacing communities, endangering habitats of rare and endangered plants and animals, and negatively affecting the environment. Most of the world’s remaining indigenous forests are located in Canada, Alaska, Russia and the Northwestern Amazon basin. We must protect what is left before it is too late.
Logging generally falls into two categories: selective logging and clear-cutting logging. Selective logging involves taking only trees of high value. Clear-cutting involves the taking of all trees in an area, thus clearing the entire forest. While selective logging is promoted as being more environmentally responsible than clear-cutting, it can be very damaging to the surrounding trees which are left standing. The heavy equipment used in logging often damages the surrounding trees. Around 40 out of 100 trees die from just one tree being selectively logged.
Logging Threatening Species
The massive activity of logging, both legal and illegal, involves the felling of trees on such a large scale that it is one of the major forms of deforestation. Only thirty-one percent of our Earth's surface is still covered by forests. Of this, rich tropical forests like those found in the Amazon, Congo River Basin and Mekong River Basin account for almost three-fourths of the covered area. For the timber industry, these precious million-year old forests are prime targets for logging. It is in such tropical forests of the world that 80 percent of endangered species reside. The impact on the general ecology and habitat of all living creatures is in danger when over fifty thousand hectares of forests continue to vanish every year.
Seven countries account for approximately 60 percent of the total deforestation on Earth, including Canada, the United States, Brazil, Indonesia, China, Russia and the Democratic Republic of Congo in Africa. About half of world’s timber and up to 70% of paper is consumed by the United States, Europe and Japan. An estimated 18 million acres (7.3 million hectares) of forest are lost every year. One and a half acres of forest is cut down every second. Up to 28,000 species may become extinct in the next quarter of a century from deforestation.
Few consumers are aware that the timber used for their hardwood floors, kitchen tables and cabinets come from illegal felling operations carried out in African forests that house elephants, lions, rhinoceros, gorillas and many rare and endangered species. Illegal logging has resulted in loss of habitats in regions spread across wide geographies from the Amazon, Congo Basin, Borneo in Indonesia and the forests of Siberia. Particularly threatened by such activities are the dwarf gorillas of the southern Congo basin, orangutans in Borneo and the great Siberian tiger.
In a virtually dry continent like Australia, rare tropical forest cover has been reduced by half as a result of logging. Precious eucalyptus forests cover only 8 percent of Australia, but house 47 percent of its animals that use hollows in trees as their homes. The yellow-bellied glider, the brush-tailed phascogale, the greater glider, the Leadbeater’s possum and various squirrel species are some of the animals that depend on tree hollows and have been affected by logging. Australian blue gum plantations are home to thousands of the iconic koala bear and the continuous felling of these trees are a constant threat to the endangered animal.
In South-eastern Australia logging has led to increased light penetration that facilitates the growth of lantana, a toxic plant preferred by the bell miner – a species of bird that preys on insects that inhabit these plants. The bell miner drives out smaller species of birds that would have otherwise fed on such insects. Sudden increases in insect loads means they feed on eucalyptus leaves, eating into a vital food source of the koala bear.
In Pennsylvania an astonishing 99 percent of the population of the northern long-eared bat, and 75 percent of the Indiana bat, have been lost to intensive logging and related activities. These two species of bat depend largely on the older and larger trees of the forests for foraging and roosting.
Forests of Madagascar, isolated from mainlands for tens of millions of years, have developed a quality of timber unmatched anywhere in the world. Loggers in search premium wood have mercilessly felled trees over the decades for export to affluent markets of China and the Far-East. The bio-diversity evolved over the millions of years in Madagascar forests has created a stunning array of 200,000 species of plants, insects, mammals and birds found nowhere else in the world. Forests that house thousands of endemic species like baobabs, lemurs, and Uroplatus geckos, have halved in cover since the advent of man on the island just 1,000 years ago. The very survival of such wildlife is in danger.
Careful planning and the use of reduced-impact logging (RIL) practices can help avoid some of the destructive damage caused by logging. RIL practices include better planned logging roads, directional felling so that cut trees do not crush trees left standing, and cutting vines that may pull other trees down with those being harvested. However, any type of logging can result in devastating impacts on forest animals, and on mammals and amphibians in particular.
Humans must realize that even now seventy percent of our Earth's land animals live in forests. It's time for a proper substitute to timber. For the timber and paper industry, profits should take a back seat to conservation. We must save the only habitats the endangered wildlife of the world have left.
Logging Effects On Wildlife And The Environment
- Logging causes a loss of bio-diversity. When forests are logged, species lose their habitat, food sources, and shelter. Primary trees also provide seeds for new trees. The seed source is lost when the trees are harvested.
- Logging causes extinction. Many animal species rely on trees for their food sources and shelter.
- Logging causes ecosystem fragmentation. Habitats are cut into fragments, affecting food availability, migration patterns and shelter. Forest fragmentation is threatening the survival of many species.
- Logging causes erosion. Trees and leaf litter are essential nutrients for the soil in forests and prevent erosion by absorbing water – keeping nutrients in the top-soil from washing away.
- Logging causes flooding. Trees stable soil by absorbing rain water. When trees are removed, flooding and mud-slides can result.
- Logging obstructs streams and rivers. Erosion and flooding caused by logging causes soil and silt to flow into water systems. Clouded water can prevent fish and other species from laying eggs and constructing nests.
- Logging is changing the climate. Trees store carbon. When forests are harvested, the carbon is released into the atmosphere in the form of carbon dioxide. A greenhouse gas, carbon dioxide absorbs heat and creates global warming.
What You Can Do
- You can help save forests by making responsible daily choices. By consuming less, eating sustainable food, choosing recycled or certified sustainable wood products, and opting for alternative products, you can reduce deforestation.
- Choose more sustainable products whenever possible. Hemp is a fast-growing and sustainable crop that produces more construction-grade fiber per acre than most trees. Bamboo is also a fast-growing plant stronger than most slow-growing trees. Soy can be made into a variety of products and can make traditional wood products safer - replacing dangerous glues, formaldehyde, and other toxic solvents. Additional plant fibers and recycled materials are being used to create a vast array of items. Composite materials combine wood with other components.
- When you do buy wood products, choose 100 percent post-consumer content materials when available. When purchasing products made from virgin forest fiber, look for a seal from a credible forestry certification system.
- Support companies that have adopted forest-friendly policies.
- Reduce, reuse and recycle to lower the need for more raw materials from trees.
- Reduce or eliminate meat, eggs and dairy from your diet. A plant-based diet drastically reduces the devastating deforestation happening around the world from animal agriculture practices.
- Educate others about how their everyday choices impacts forests.
Seals & Sea Lions Under Siege
20 Nov, 2024
The image of seals and sea lions conjures up thousands of these creatures basking on the rocky beaches of the U.S. West coast, Australia and Tasmania and ice floes of the Arctics. While similarities between these two amphibious mammals seem apparent, there are some inherent differences.The pinniped, the family to which these two belong, consists of the phocidae or true seals and otariidae or sea lions. True seals are believed to have descended from a terrestrial creature closely resembling the weasel, while the sea lion traces back its origins to a bear-like animal. True seals fall in the category of earless seals because they lack the external ear flap which sea lions, or "eared seals", have. The sea lions have much larger front and hind flippers than the seals, which allow far more locomotion. So while on land the seal slushes forward at snails' pace on its belly, the sea lion virtually gallops forward thanks to it bigger flippers. Like most aquatic mammals, both the seal and sea lion are expert swimmers.
All pinnipeds, like many other wildlife species, have not been spared the ravages of mankind. The hunting of millions of seals for their meat, blubbers and pelts reduced their numbers significantly. Later they were killed by fishermen who over-harvested fish, then blamed the seals for depleting fish stocks in the ocean.
Extensive commercial fishing has harmed pinnipeds in more ways than one. Reduced food, resulting from irresponsible fishing practices, is suspected to be behind a declining pinnped population. Seals and sea lions also get entangled in fishing gear, causing injury or death.
A high amount of industrial and toxic waste is a potent threat to the health of seals. Algal biotoxins and disease caused by such pollutants are proving to be fatal for seals and sea lions. Non-biodegradable marine debris, such as drifting trawling nets, plastic packaging straps and monofilament gill nets, are hazards that have killed nearly 2 percent of Tasmanian seals.
Climate change is also a deadly threat to seals and sea lions. Changes in temperatures in ocean currents has wreaked havoc in the food patterns of these mammals and affected their reproductive cycles. Species which primarily rely on ice – like the ribbon, ringed, spotted and bearded seals – have been direct victims of rapid ice loss leading to premature separation of mothers from their cubs during the milking period. The inability of the mammals to build dens during such periods of ice loss has resulted in high mortality among pups.
Other threats to seals and sea lions include introduced species and barbed wire. The introduction of animals like dogs, especially in Alaska, has made seals prone and exposed to disease. Barbed wire barriers have been erected that are known to cause severe injuries to sea lions.
Seals have long been commercially hunted for their pelts, meat and blubber. As a result, the Caribbean monk seal was hunted to extinction. In 1911 the North Pacific Fur Seal Convention made it illegal to hunt seals at sea, but hunting babies seals on land continued. All pinnipeds are now protected in U.S. waters under the Marine Mammal Protection Act, but baby seals are still being killed in other countries for their fur.
Each year thousands of seals are killed in Canada. Although the Canadian seal hunt is the largest in the world and has the highest profile internationally, sealing is also carried out in a number of other countries across the world including Greenland, Namibia, Russia, Norway and Sweden.
Seal hunting is inhumane. Groups have campaigned on the issue for years and their evidence shows all the horror of the hunt.
Seals and sea lions are also common victims of the animal entertainment industry. Aquariums and marine mammal theme parks are part of a billion-dollar industry built on the suffering of intelligent, social beings who are denied everything that is natural and important to them. Animals are taken from the wild; their families torn apart. Marine parks have shown no more interest in conserving marine mammals' natural habitats than they have in educating audiences.
Cetaceans do not belong in captivity where they are forced to perform meaningless tricks. They are often separated from family members when they’re shuffled between parks. Most die far short of their natural life spans. The living conditions at these attractions are often dismal, with animals confined to tiny, filthy, barren enclosures. Even the best artificial environments can’t come close to matching the space, diversity, and freedom that cetaceans have in their natural habitats.
The monk seal and the Galápagos fur seal are endangered. Local populations of some seals, such as gray seals in the Baltic Sea, are also endangered. The hooded seal and northern fur seal are vulnerable.
The Extinction Crisis
11 Nov, 2024
It's a dreadful reality. We are going through our sixth period of plant and animal mass extinction, the sixth to happen in the last 500 million years. The current wave is considered to be the worst series of species elimination since the dinosaurs disappeared 65 million years ago. Granted, extinction is a phenomenon that occurs naturally, however it normally happens at a rate of 1 to 5 species every year. But, as scientists estimate, we are currently losing species 1,000-10,000 times faster than that, which means that literally tens of species are vanishing from the face of the Earth every day. We could be looking at a frightening future. By this rate, almost one third to one-half of all species could become extinct by 2050.
The difference with past extinctions, which were caused by catastrophic natural phenomena like volcanic eruptions, asteroid strikes, and violent climate changes, is that the current crisis is caused almost entirely by humans. As a matter of fact, as many as 99% of the species at the threshold of extinction are there due to human activities, particularly the ones that drive the introduction of exotic species, loss of habitat, and global warming. With the increasing rate of change in our biosphere, coupled with the fact that every species’ extinction may trigger a cascade of subsequent extinctions due to inter-species dependence in the complicated web of the ecosystem, it’s not unlikely that extinction numbers in the future will increase exponentially.
The variety of species safeguards the resilience of the ecosystem, providing ecological communities the breadth needed to endure stress. Although the efforts of conservationists are often focused on ecosystems with high numbers of species, like coral reefs and rainforests, preserving biodiversity must not leave other habitats with fewer species out, like tundra, grasslands, and polar seas. Devastating consequences stem from any species loss. What’s more, most of the focus regarding extinction is on what’s happening globally, but the vast majority of biodiversity’s advantages are seen locally. Keeping local populations safe is the sole way of ensuring a species’ survival in the long term, via the maintenance of genetic diversity.
Over the last 500 years, as many as one thousand species vanished, without even accounting for many thousands more that went extinct before science discovered and described them. Almost 38% of all known species on a global scale are on the verge of extinction. This puts many thousands of unique species in the dire position of being gone forever.
Amphibian Extinction Crisis
Amphibians have the sad privilege of being endangered more than any other animal group. At least 30 percent of all amphibian species are now threatened to disappear. Toads, frogs, and salamanders are vanishing due to animal agriculture, habitat loss, air and water pollution, global warming, UV light exposure, disease, and the introduction of exotic species. Because this group of animals is overly sensitive to environmental change, they should be regarded as the canary in the global coal mine. Amphibians alert us to minor but definite changes in the ecosystem that could lead to the extinction of many more species, not excluding humans.
Bird Extinction Crisis
Birds are present in almost all habitats on earth and are usually the most familiar and visible wildlife to people all over the world. Because of this, they may act as a significant indicator for monitoring how the biosphere changes. Diminishing bird populations in the majority of habitats are the sad confirmation that major changes are taking place on Earth because of our activities. More than 12% of currently known species of birds are at the threshold of extinction. The biggest impact on bird population has been caused by degradation and loss of habitat, with collectors’ activities and invasive species following closely.
Fish Extinction Crisis
Fishing, rising water demand, river dams, water pollution and invasive species place aquatic ecosystems among the most endangered on Earth. Therefore, the fact that many species of fish – both marine, and freshwater – are currently endangered, does not come as a surprise. More than one fifth of all known fish species are now considered to be at imminent risk.
Invertebrate Extinction Crisis
Invertebrates, from mollusks to butterflies to earthworms to corals, exhibit vast levels of diversion. Almost 97% of all animal species on earth are estimated to belong to this group. One-third of the known invertebrate species are now threatened with extinction. Water pollution, water projects, and groundwater withdrawal threaten freshwater invertebrates, while deforestation and animal agriculture is also a great factor of invertebrate endangerment or extinction. In addition, reef-building corals in the ocean are diminishing at an increasing rate.
Mammal Extinction Crisis
Probably the most characteristic element of the current extinction crisis is that most of our primate relatives are in serious danger. Almost 90% of the primate population lives in the tropical forest, which are disappearing fast due to animal agriculture, deforestation and development. About half of all the primate species on Earth are at the brink of extinction. 50 percent of all known mammals see rapidly decreasing populations, and almost 20 percent are close to extinction. Marine mammals – including dolphins, whales, and porpoises – are particularly close to becoming extinct.
Reptile Extinction Crisis
More than one fifth of all known reptile species are considered endangered or close to becoming extinct. This has been particularly pronounced for island reptile species, counting at least 28 island reptiles having disappeared so far. This pattern of extinction, commonly seen in the islands, is finding its way toward the mainland as well. This crisis is mainly due to human intervention causing fragmentation in the continental habitats, which results in island-like territories, isolating species among each other. Reptiles are especially threatened by non-native species that compete for resources or feed on them, and habitat loss.
Plant Extinction Crisis
Plants are the food we consume and the producers of the oxygen we breathe through the process of photosynthesis. Most of the life on Earth is dependent on plants. Moreover, the majority of medicines are plant-based or plant-derived. Almost 70 percent of known plant species are on the verge of extinction. Unlike animals, plants cannot migrate to a different habitat when threatened, which makes them all too vulnerable. Plant extinction is expected to dramatically increase due to animal agriculture and global warming. The distribution and range of plants worldwide is changing immensely due to the rising temperatures. Since plants form the basis of all ecosystems and the foundation of the food chain, this will affect every species that depends on them for shelter, food, and survival.