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News articles on extinction
Mongabay.com news articles on extinction in blog format. Updated regularly.
Island bat goes extinct after Australian officials hesitate
(05/23/2012) Nights on Christmas Island in the Indian Ocean will never again be the same. The last echolocation call of a tiny bat native to the island, the Christmas Island pipistrelle (Pipistrellus murrayi), was recorded on August 26th 2009, and since then there has been only silence. Perhaps even more alarming is that nothing was done to save the species. According to a new paper in Conservation Letters the bat was lost to extinction while Australian government officials equivocated and delayed action even though they were warned repeatedly that the situation was dire. The Christmas Island pipistrelle is the first mammal to be confirmed extinct in Australia in 50 years.
Wildlife in the tropics plummets by over 60 percent
(05/15/2012) In 48 years wildlife populations in the tropics, the region that holds the bulk of the world's biodiversity, have fallen by an alarming 61 percent, according to the most recent update to the Living Planet Index. Produced by the World Wide Fund for Nature (WWF) and the Zoological Society of London (ZSL), the index currently tracks almost 10,000 populations of 2,688 vertebrate species (including mammals, birds, reptiles, amphibians, and fish) in both the tropics and temperate regions.
Biodiversity loss cripples plant growth
(05/02/2012) For decades scientists have been warning that if global society continues with "business-as-usual" practices the result will be a mass extinction of the world's species, an extinction event some researchers say is already underway. However, the direct impacts of global biodiversity loss has been more difficult to compile. Now a new study in Nature finds that loss of plant biodiversity could cripple overall plant growth.
Over 30 Yangtze porpoises found dead in China as population nears extinction
(05/01/2012) Six years after the Yangtze river dolphin (Lipotes vexillifer), or baiji, was declared "functionally extinct" by scientists, another marine mammal appears on the edge of extinction in China's hugely degraded Yangtze River. In less than two months, 32 Yangtze finless porpoises (Neophocaena asiaeorientalis asiaeorientalis), a subspecies of the finless porpoise, have been dead found in Dongting and Poyang Lakes in the Yangtze, reports the World Wide Fund for Nature (WWF).
Skink biodiversity jumps 650 percent in the Caribbean
(04/30/2012) In a single paper in Zootaxa scientists have rewritten the current understanding of lizard biodiversity in the Caribbean. By going over museum specimens of skinks, scientists have discovered 24 new species and re-established nine species previously described species, long-thought invalid. The single paper has increased the number of skinks in the Caribbean by 650 percent, from six recognized species to 39. Unfortunately, half of these new species may already be extinct and all of them are likely imperiled.
Doing good and staying sane amidst the global environmental crisis
(04/23/2012) Several years ago while teaching a course in environmental science a student raised her hand during our discussion of the circumstances of modern ecological collapse and posed the question, "what happens when there is no more environment?" At the time I had no response and stumbled to formulate some sort of reply based on the typical aseptic, apathetic logic with which we are programmed through education in the scientific tradition: that there will always be some sort of environment, that life has prospered through the five previous mass extinctions and that something will survive. While this may be the case, the time has come for more of us to consider the broader spectrum of what global humanity is facing as the planet’s ecology is decimated.
Humans killed off magnificent Australian megafauna, flipping rainforest into savannah
(03/27/2012) The theory that humans, and not climate change, was primarily responsible for the extinction of giant marsupials in prehistoric Australia takes another step forward with a new study in Science. Exploring sediment cores for past evidence of big herbivores, researchers found that the arrival of humans coincided with the loss of a menagerie of magnificent beasts, from giant kangaroos to fearsome marsupial lions and monster birds to Komodo dragon-like reptiles. The decline of this megafauna ultimately led to ecological changes that may have caused Australia's rainforest to become savannah.
World's smallest dolphin: only 55 left, but continue to drown in nets
(03/22/2012) The world's smallest dolphin is also the closest to extinction. New Zealand government figures show that Maui's dolphin (Cephalorhynchus hectori maui) are down to just 55 mature individuals, falling from 111 in 2005. The small cetaceans, measuring up to 1.7 meters (5.5 feet), are imperiled due to drowning in gillnets with the most recent death by a fisherman's net occurring in January.
Over 5,000 vital biodiversity sites remain unprotected
(03/22/2012) A recent study has found that half of the world's Important Bird Areas (IBAs) and Alliance for Zero Extinction (AZE) sites remain unprotected, leaving many endangered species, some on the verge of extinction, gravely vulnerable to habitat loss. Published in the open access journal PLoS ONE, the study urges governments to focus on expanding protected areas to cover the species that need it most.
Javan officials employ camera traps to find extinct tiger
(03/13/2012) Although officially declared extinct in 2003, some people believe the Javan tiger (panthera tigris sondaica) is still alive in the island's Meru Betiri National Park. To prove the big cat has not vanished for good, wildlife officials have installed five camera traps in the park, reports Antara News.
Niger creates desert park bigger than Hungary
(03/07/2012) Yesterday, the Niger government formally created the Termit and Tin Toumma National Nature and Cultural Reserve in the Sahara Desert, reports the Sahara Conservation Fund. The reserve, now one of the largest in Africa, expands existing protected areas to 100,000 square kilometers (38,610 sq. miles), an area bigger than Hungary and nearly twice the size of Costa Rica.
Carbon emissions paving way for mass extinction in oceans
(03/05/2012) Human emissions of carbon dioxide may be acidifying the oceans at a rate not seen in 300 million years, according to new research published in Science. The ground-breaking study, which measures for the first time the rate of current acidification compared with other occurrences going back 300 million years, warns that carbon emissions, unchecked, will likely lead to a mass extinction in the world's oceans. Acidification particularly threatens species dependent on calcium carbonate (a chemical compound that drops as the ocean acidifies) such as coral reefs, marine mollusks, and even some plankton. As these species vanish, thousands of others that depend on them are likely to follow.
When giant coyotes roamed the Earth
(02/27/2012) Not long ago, geologically speaking, coyotes (Canis latrans) were bigger and more robust than today's animals. In the late Pleistocene, over 10,000 years ago, coyotes rivaled grey wolves (Canis lupus) in size. But, according to a new paper in the Proceedings of the National Academy of Sciences (PNAS), coyotes shrunk significantly following the megafaunal extinction—including the disappearance of big herbivores like giant sloths and mastodons and predators like the smilodon—due to changes in prey and predator competition.
Celebrate frogs on leap day!
(02/20/2012) The NGO Amphibian Ark is asking frog-lovers to visit their local zoos on up-coming leap day, February 29th. Dubbed, Leaping Ahead of Extinction, the program includes 58 zoos and other amphibian breeding facilities in seventeen countries that have captive breeding populations of endangered amphibians.
New sanctuaries declared for Asia's freshwater dolphins
(02/15/2012) Bangladesh has declared three new sanctuaries to help protect the south Asian river dolphin (Platanista gangetica) in the Sundarbans, the world's largest mangrove forest. Split into two subspecies, the Ganges River dolphin (Platanista gangetica gangetica) and the Irrawaddy River dolphin (Platanista gangetica minor), the new sanctuaries will benefit both. Listed as Endangered by the IUCN Red List, the south Asian freshwater dolphin has disappeared from much of its habitat. Already Asia has its other freshwater dolphin species: the baiji (Lipotes vexillifer) was declared functionally extinct into 2006 after a survey of the Yangtze River failed to find a single individual.
Forgotten species: the wild jungle cattle called banteng
(01/31/2012) The word "cattle," for most of us, is the antithesis of exotic; it's familiar like a family member one's happy enough to ignore, but doesn't really mind having around. Think for a moment of the names: cattle, cow, bovine...likely they make many of us think more of the animals' byproducts than the creatures themselves—i.e. milk, butter, ice cream or steak—as if they were an automated food factory and not living beings. But if we expand our minds a bit further, "cattle" may bring up thoughts of cowboys, Texas, herds pounding the dust, or merely grazing dully in the pasture. But none of these titles, no matter how far we pursue them, conjure up images of steamy tropical rainforest or gravely imperiled species. A cow may be beautiful in its own domesticated sort-of-way, but there is nothing wild in it, nothing enchanting. However like most generalizations, this idea of cattle falls to pieces when one encounters, whether in literature or life, the banteng.
Photos: program devoted to world's strangest, most neglected animals celebrates five years
(01/16/2012) What do Attenborough's echidna, the bumblebee bat, and the purple frog have in common? They have all received conservation attention from a unique program by the Zoological Society of London (ZSL) called EDGE. Five years old this week, the program focuses on the world's most unique and imperiled animal species or, as they put it, the most Evolutionarily Distinct and Globally Endangered (EDGE) species. In the past five years the program has achieved notable successes from confirming the existence of long unseen species (Attenborough's echidna) to taking the first photos and video of a number of targeted animals (the purple frog).
Seals, birds, and alpine plants suffer under climate change
(01/11/2012) The number of species identified by scientists as vulnerable to climate change continues to rise along with the Earth's temperature. Recent studies have found that a warmer world is leading to premature deaths of harp seal pups (Pagophilus groenlandicus) in the Arctic, a decline of some duck species in Canada, shrinking alpine meadows in Europe, and indirect pressure on mountain songbirds and plants in the U.S. Scientists have long known that climate change will upend ecosystems worldwide, creating climate winners and losers, and likely leading to waves of extinction. While the impacts of climate change on polar bears and coral reefs have been well-documented, every year scientists add new species to the list of those already threatened by anthropogenic climate change.
Happy rhino news: no rhinos poached in Nepal last year
(01/10/2012) As rhinos again fell to poachers in record numbers in 2011, there was one bright-spot: Nepal. Not a single rhino was killed by poachers in the Himalayan nation, home to an estimated 534 greater one-horned rhinos (Rhinoceros unicornis), categorized as Vulnerable by the IUCN Red List. Conservationists celebrated at Chitwan National Park, which holds the vast majority of the country's rhinos.
How lemurs fight climate change
(01/09/2012) Kara Moses may have never become a biologist if not for a coin toss. The coin, which came up heads and decided Moses' direction in college, has led her on a sinuous path from studying lemurs in captivity to environmental writing, and back to lemurs, only this time tracking them in their natural habitat. Her recent research on ruffed lemurs is attracting attention for documenting the seed dispersal capabilities of Critically Endangered ruffed lemurs as well as theorizing connections between Madagascar's lemurs and the carbon storage capacity of its forests. Focusing on the black-and-white ruffed lemur's (Varecia variegata) ecological role as a seed disperser—animals that play a major role in spreading a plant's seeds far-and-wide—Moses suggests that not only do the lemurs disperse key tree species, but they could be instrumental in dispersing big species that store large amounts of carbon.
Critically Endangered Hawaiian monk seals bludgeoned to death
(01/08/2012) To date three Hawaiian monk seals (Monachus schauinslandi), and possibly a fourth mortality under investigation, have been found bludgeoned to death by an as yet undiscovered assailant, reports the Associated Press. Authorities believe the seals may have been killed by local fishermen who fear new regulations meant to save the species from extinction. The seal is currently down to 1,100 individuals.
Camera traps snap 35 Javan rhinos, including calves
(01/04/2012) Camera traps have successfully taken photos of 35 Javan rhinos (Rhinoceros sondaicus) in Ujung Kulon National Park. The small population, with an estimated 45 or so individuals, is the species' last stand against extinction. Late last year, a subspecies of the Javan rhino, the Vietnamese rhino (Rhinoceros sondaicus annamiticus), was declared extinct.
Top 10 Environmental Stories of 2011
(12/22/2011) Many of 2011's most dramatic stories on environmental issues came from people taking to the streets. With governments and corporations slow to tackle massive environmental problems, people have begun to assert themselves. Victories were seen on four continents: in Bolivia a draconian response to protestors embarrassed the government, causing them to drop plans to build a road through Tipnis, an indigenous Amazonian reserve; in Myanmar, a nation not known for bowing to public demands, large protests pushed the government to cancel a massive Chinese hydroelectric project; in Borneo a three-year struggle to stop the construction of a coal plant on the coast of the Coral Triangle ended in victory for activists; in Britain plans to privatize forests created such a public outcry that the government not only pulled back but also apologized; and in the U.S. civil disobedience and massive marches pressured the Obama Administration to delay a decision on the controversial Keystone XL pipeline, which would bring tar sands from Canada to a global market.
Photos: 208 species discovered in endangered Mekong region in 2010
(12/14/2011) Last year researchers scoured forests, rivers, wetlands, and islands in the vanishing ecosystems of the Mekong Delta to uncover an astounding 208 new species over a twelve month period. A new report by the World Wide Fund for Nature (WWF) highlights a number of the new species—from a new snub-nosed monkey to five new meat-eating pitcher plants to a an all-female, cloning lizard—while warning that many of them may soon be gone as the Mekong Delta suffers widespread deforestation, over-hunting and poaching, massive development projects, the destruction of mangroves, pollution, climate change, and a growing population.
Locals key to saving primate-rich wetlands in Cote D'Ivoire
(12/12/2011) Saved from being converted into a vast palm oil plantation by PALM-CI in 2009, the Ehy Tanoé wetlands and forest in the Cote D'Ivoire (Ivory Coast) is home to three gravely endangered primates and as well as many other species. Since 2006, a pilot community management program has been working to protect the 12,000 hectare area, and a new study in mongabay.com's open access journal Tropical Conservation Science finds that long-term conservation of the Ehy Tanoé wetlands and forest is, in fact, vital for locals who depend on the area for hunting, fishing, firewood, building materials, and medicinal plants. In addition, the study finds that the ecosystem has special cultural and spiritual importance to locals.
Effort to save world's rarest frogs recognized with conservation award
(12/05/2011) An effort to save the world's most endangered amphibians has won mongabay.com's 2011 conservation award. Amphibian Ark — a joint effort of the World Association of Zoos and Aquariums, the IUCN/SSC Conservation Breeding Specialist Group, and the IUCN/SSC Amphibian Specialist Group — is working to evaluate the status of threatened amphibians, raise awareness about the global amphibian extinction crisis, and set up captive breeding programs. The initiative is targeting 500 species that will not survive without captive breeding efforts.
Environmental news in review: Keystone pipeline delayed, Dole exits banana project, a rhino goes extinct
(12/02/2011) November 2011 was a big month for environmental news stories. Topping the list was the Obama Administration's decision to delay the controversial Keystone pipeline which would have carried tar sands oil from Canada to the Gulf Coast. The scheme was vehemently opposed by environmental groups which turned the issue into a litmus test for Obama, whose campaign platform included a promise to take action on greenhouse gas emissions. More than 1,200 protesters were arrested in demonstrations leading up to Obama's decision.
Smelly frogs may be key to fighting antibiotic-resistant infections
(12/01/2011) Foul smelling frogs may save lives, according to new research in the Journal of Proteome Research. Examining nine species of Chinese frogs, known as "odorous" frogs for their off-putting smell, researchers have discovered an astounding variety of antimicrobial peptides, or put simply bacteria-killers.
$500 offered for rediscovery of extinct snake
(11/29/2011) Need to make a quick 500 bucks? Easy: head to Glades County, Florida and find a specimen of the South Florida rainbow snake (Farancia erytrogramma seminola), which the US government says is extinct. In an unusual bid two NGOS, the Center for Biological Diversity (CBD) and the Center for Snake Conservation, are offering a substantial reward to the first person who can prove that the South Florida rainbow snake has not vanished forever.
Featured video: world's only video of extinct 2-foot-long imperial woodpecker
(11/16/2011) Newly-discovered video has brought the extinct imperial woodpecker (Campephilus imperialis) back to life—at least for a few seconds.
Orangutans in Indonesian Borneo doomed to extinction?
(11/14/2011) A new study finds orangutans in Indonesian Borneo in unprotected areas are being killed at a rate faster than what population viability analysis considers sustainable. Conflict between orangutans and humans is worst in areas that have been fragmented and converted for timber, wood-pulp, and palm oil production, but hunting is occurring in relatively intact forest zones away from industrial development.
A final farewell: the Western Black Rhino goes extinct
(11/12/2011) The western black rhinoceros (Diceros bicornis longipes) roams the woodlands of Africa no more. The rhino, one of four sub-species of black rhino, was declared extinct this week by the IUCN, five years after the last extensive survey of its habitat in Cameroon. The rhino becomes the second declared extinct this year. All rhinos are threatened by the rhino horn trade.
Unanimous agreement among scientists: Earth to suffer major loss in species
(11/09/2011) The thylacine, the dodo, the great auk, the passenger pigeon, the golden toad: these species have become symbols of extinction. But they are only the tip of the recent extinction crisis, and according to a survey of 583 conservation scientists, they are only the beginning. In a new survey in Conservation Biology, 99.5 percent of conservation scientists said a serious loss in biodiversity was either 'likely', 'very likely', or 'virtually certain'. The prediction of a significant loss of species is not surprising—scientists have been warning for decades that if global society continues with business as usual the world will suffer from mass extinction—what is perhaps surprising is the practically unanimous expectation that a global biodiversity decline will occur.
Museum specimens reveal the tracks of an amphibian epidemic
(11/07/2011) Dead men tell no tales, but dead frogs can speak volumes. Scientists have shown that frogs and salamanders preserved in museums tell the history of a deadly fungus and its spread across Mexico and Central America. The new finding, published recently in the Proceedings of the National Academy of Sciences (PNAS), may help explain past and ongoing amphibian die-offs in the region.
Aloha, and welcome to the planet's extinction capital
(11/07/2011) Hawaii evokes images of a tropical paradise where fragrant flowers, vivid colors, exotic plants, birds, and
fish abound. Unfortunately, much of Hawaii's original native flora and fauna has disappeared since the
arrival of Europeans in the 18th Century. Hawaii now has the dubious distinction as having become the
planet’s extinction capital, having lost more than 55 endemic species (mostly native forest birds) which
account for nearly one third of recorded of bird extinctions since the 1700s.
Malaysia must take action to avoid extinction of its last rhinos
(11/05/2011) Malaysia must take immediate action to prevent the extinction of the handful of rhinos that survive on the island of Borneo, says a coalition of environmental groups.
New site is a match-maker for world's endangered frogs
(11/03/2011) A new initiative by the conservation group, Amphibian Ark, hopes to match lonely, vanishing frogs with a prince/princess to to save them. Dubbed FrogMatchMaker.com after online dating sites, the program is working to connect supporters and donors with amphibian conservation programs in need. Currently, amphibians are among the world's most imperiled species with 41 percent threatened with extinction according to the IUCN Red list.
South Africa hits record poaching of rhinos—again
(11/03/2011) Two months before the end of the year, the number of rhinos killed for their horns in South Africa has surpassed last year's breaking record, reports conservation organizations WWF and TRAFFIC. So far, 341 rhinos have been lost to poaching this year; while last year saw a total record of 333. The news follows last week's announcement that the Vietnamese rhino (Rhinoceros sondaicus annamiticus), a subspecies of the Javan rhino, has gone extinct—the last individual killed by a poachers' bullet. Rhinos are killed for their horns which are used in traditional Chinese medicine, even though numerous studies have shown there is no medicinal benefit to consuming rhino horn.
11 challenges facing 7 billion super-consumers
(10/31/2011) Perhaps the most disconcerting thing about Halloween this year is not the ghouls and goblins taking to the streets, but a baby born somewhere in the world. It's not the baby's or the parent's fault, of course, but this child will become a part of an artificial, but still important, milestone: according to the UN, the Earth's seventh billionth person will be born today. That's seven billion people who require, in the very least, freshwater, food, shelter, medicine, and education. In some parts of the world, they will also have a car, an iPod, a suburban house and yard, pets, computers, a lawn-mower, a microwave, and perhaps a swimming pool. Though rarely addressed directly in policy (and more often than not avoided in polite conversations), the issue of overpopulation is central to environmentally sustainability and human welfare.
The last goodbye: Vietnam's rhino goes extinct (PICTURES)
(10/26/2011) In 2009 poachers shot and killed the world's last Vietnamese rhinoceros (Rhinoceros sondaicus annamiticus), a subspecies of the Javan rhino. The Vietnamese rhino was the last rhino species that survived on the southeast Asia mainland.
Vietnamese rhino goes extinct
(10/25/2011) In 2009 poachers shot and killed the world's last Vietnamese rhinoceros (Rhinoceros sondaicus annamiticus), a subspecies of the Javan rhino, confirms a report from International Rhino Foundation (IRF) and the World Wide Fund for Nature (WWF). The Vietnamese rhino was the last Javan rhino to survive on the Asian mainland and the second subspecies to vanish, following the extinction of the Indian Javan rhino (rhinoceros sondaicus inermis). The Javan rhino is the world's most imperiled rhino species with now only around 50 individuals surviving in a single park on its namesake island in Indonesia.
Activists protest Australian forest destruction from top of the Sydney Opera House
(10/09/2011) A series of actions protesting forest destruction in Australia led to seven arrests last week. Led by a new NGO, The Last Stand, the activists targeted Australian retail giant Harvey Norman for allegedly being complicit in the destruction of native forests in Australia, which harbor many imperiled species found no-where else.
UN calls for secure contraceptives as wildlife group hands out Endangered Species condoms
(10/06/2011) Sometime at the end of this month, the seventh billion person on Earth will be born: that's seven billions mouths to feed, seven billion throats to water, and seven billion bodies to keep warm. But the population continues to rise: experts believe the global human population could hit 10 billion by 2050. A UN meeting last month said that to meet the needs of the world's women, the developing world needs a secure supply of contraceptives and voluntary family planning initiatives.
Florida loses two species to extinction
(10/06/2011) The US Fish and Wildlife Service announced yesterday that the believe two species in Florida have vanished into the long dark night: the South Florida rainbow snake (Farancia erytrogramma seminola) and the Florida fairy shrimp (Dexteria floridana). The species were under review for possibly being added to the Endangered Species Act (ESA), but it's likely the review came decades too late.
Scientists find frog genes that provide immunity to extinction plague
(09/27/2011) Scientists with Cornell have discovered genetics that may provide immunity to frogs in face of the killer amphibian-disease chytridiomycosis. This plague, which is spreading to amphibian populations worldwide, is responsible for a number of frog species' recent extinction. But now researchers report in a new study in the Proceedings of the National Academy of Sciences (PNAS) that they are one step closer to understanding why some frog populations are able to fend off the disease, while others succumb with lightning-speed. In time, the results may lead to breeding strategies in captivity that could produce immune populations.
New seabird discovered from Hawaii, but no one knows where it lives
(08/30/2011) Researchers have uncovered a new seabird native to Hawaii stuffed in a museum. Originally identified as a smaller variation of a little shearwater (Puffinus assimilis), DNA tests showed that the bird, which was collected over four decades ago, was in fact a unique species. Named Bryan’s shearwater (Puffinus bryani), the fate of this bird in the wild remains unknown.
Over 80 percent of rediscovered species still face extinction
(08/18/2011) Imagine if your job was to locate extinct species. In 2010, biologists with The Search for Lost Frogs set out on a tropical mission hoping to confirm the existence of frog species not seen in decades. The team recovered proof of four out of a hundred missing species, including a toad among the expedition's Top Ten Amphibians list. According to a new study study in the open access journal PLoS ONE, such biological surveys are critical conservation tools to prevent the 'romeo error': the abandonment of conservation efforts due to belief that a species is extinct. The study, the first of its kind, found that rediscovered species are especially in danger of vanishing again, this time altogether, without targeted conservation measures.
The glass is half-full: conservation has made a difference
(08/11/2011) Don't despair: that's the message of a new paper in Trends in Ecology and Evolution, which argues that decades of conservation actions at multiple scales have had a positive impact for many of the world's endangered species. While such actions have not yet turned back the tide of the current mass extinction crisis, they have achieved notable successes which often get lost in the gloom-and-doom news stories on biodiversity declines. According to the paper, conservation actions take place on three scales. Microscale conservation focuses on a single species or ecosystem; mesoscale means conservation cooperation between a number of countries, such as efforts to curb the illegal wildlife trade or protect wide-ranging species; and finally macroscale means global organizations or campaigns, such as those that pressure multinational corporations to become more biodiversity-friendly.
Protected areas not enough to save life on Earth
(08/03/2011) Since the creation of Yellowstone National Park in 1872 protected areas have spread across the world. Today, over 100,000 protected areas—national parks, wildlife refuges, game reserves, marine protected areas (MPAs), wildlife sanctuaries, etc.—cover some 7.3 million square miles (19 million kilometers), mostly on land, though conservation areas in the oceans are spreading. While there are a number of reasons behind the establishment of protected areas, one of the most important is the conservation of wildlife for future generations. But now a new open access study in Marine Ecology Progress Series has found that protected areas are not enough to stem the loss of global biodiversity. Even with the volume of protected areas, many scientists say we are in the midst of a mass extinction with extinction levels jumping to 100 to 10,000 times the average rate over the past 500 million years. While protected areas are important, the study argues that society must deal with the underlying problems of human population and overconsumption if we are to have any chance of preserving life on Earth—and leaving a recognizable planet for our children.
Decline in top predators and megafauna 'humankind’s most pervasive influence on nature'
(07/14/2011) Worldwide wolf populations have dropped around 99 percent from historic populations. Lion populations have fallen from 450,000 to 20,000 in 50 years. Three subspecies of tiger went extinct in the 20th Century. Overfishing and finning has cut some shark populations down by 90 percent in just a few decades. Though humpback whales have rebounded since whaling was banned, they are still far from historic numbers. While some humans have mourned such statistics as an aesthetic loss, scientists now say these declines have a far greater impact on humans than just the vanishing of iconic animals. The almost wholesale destruction of top predators—such as sharks, wolves, and big cats—has drastically altered the world's ecosystems, according to a new review study in Science. Although researchers have long known that the decline of animals at the top of food chain, including big herbivores and omnivores, affects ecosystems through what is known as 'trophic cascade', studies over the past few decades are only beginning to reveal the extent to which these animals maintain healthy environments, preserve biodiversity, and improve nature's productivity.
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