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Tag: "extinction" at biology news

Bigger horns equal better genes

...range in Europe, alpine ibex were hunted almost to extinction about a century ago for sport and the purported pharmacological properties of their horns. The last survivors were protected in an Italian national park, and the species has slowly repopulated and today is no longer considered endangered. ...

Ancient DNA traces the woolly mammoth's disappearance

...results on other species, a picture is emerging of extinction not as a sudden event at the end of the last ice a...en we should be very concerned about the potential extinction of many existing large mammals, studying those that occurred in the geologically recent past can pro...

The kapok connection -- Study explains rainforest similarities

...od," Dick said. "It might be saved from widespread extinction by continuing to invade new land areas through oceanic dispersal."...

Ice Age extinction claimed highly carnivorous Alaskan wolves

The extinction of many large mammals at the end of the Ice Age ma...rally thought to have survived the end-Pleistocene extinction relatively unscathed. But this previously unrecognized type of wolf appears to have vanished without...

Climate change was the cause of Neanderthal extinction in the Iberian Peninsula

...ot modern humans ?was the cause of the Neanderthal extinction in the Iberian Peninsula. Such is the conclusion o...ntribution to the understanding of the Neanderthal extinction and the colonisation of the European continent by Homo Sapiens. During the last Ice Age, the Iber...

Amphibians in losing race with environmental change

...s been estimated that the rate of plant and animal extinction is greater now than any known in the last 100,000 years, the researchers note in their report. Amphibians are of particular interest because their physiology and complex life cycle often exposes them to a wider range of environmental changes than oth...

Legal ruling may put endangered species in danger

...w defined an endangered species as one "at risk of extinction throughout all or a significant portion of its range." "It is clear that Congress intended 'range' to be the historic or former range of the animal," said John A.Vucetich, an assistant professor of population ecology in the School of Forest Resour...

Improved predictions of warming-induced extinctions sought

...er forecasting of the effects of global warming on extinction rates. The researchers, led by Daniel B. Botkin, n...e researchers "believe that current projections of extinction rates are overestimates." A critical review of the four types of model now in common use leads the t...

Cambodian vulture nests offer hope for species

...cies in Asia that have been driven to the brink of extinction across its entire range due to Diclofenac, an anti-inflammatory drug used for cattle that is highly toxic to vultures. Diclofenac has lead to global population declines as high as 99 percent in slender-billed and other vulture species. Diclofenac is...

Female Antarctic seals give cold shoulder to local males

...have helped them recover so successfully from near extinction only 100 years ago. This could in turn affect how ...nge." Antarctic fur seals were nearly hunted to extinction in the 17th and 18th Centuries by commercial sealers. There numbers are now estimated at between 2 ...

Saving endangered whales at no cost

...s been slow to recover from past exploitation, and extinction remains a threat. The whale is virtually extinct in Europe, but a small population of about 350 individuals remains on the east coast of North America. A leading threat to the species is lethal entanglement by fishing gear: Photographic evidence indi...

Climate change could trigger 'boom and bust' population cycles leading to extinction

...s will fluctuate dramatically and be more prone to extinction as a result, said Wilmers. Highly prolific species...ation fluctuations make species more vulnerable to extinction due to disease, inbreeding, and other causes; in addition, each crash reduces the genetic diversity ...

Large size crucial for Amazon forest reserves

...effects of reserve size and isolation on the local extinction and colonization of species. The species-specific estimates of effects of area and isolation on extinction and colonization processes permit prediction of effects of future fragmentation on bird communities ...

Birth rate, competition are major players in hominid extinctions

...nd years ago, they suffered a gradual decrease and extinction from about 30 to 26 thousand years ago. "Neandertal was extremely adept culturally," says Jablonski. "They had big brains, a wide variety of tools and were extremely successful as active, aggressive hunters of large game. We see evidence of hunti...

Biologists produce global map of plant biodiversity

...own to humanity." "Climate change may drive to extinction plants that hold important cures before we find them," says Kreft, a biologist at the Nees Institute for Biodiversity of Plants at the University of Bonn. "Ecological research like ours that captures complex diversity - environment relationships on a...

Twenty of world's 162 grouper species threatened with extinction

...commercial fish, found that 20 are threatened with extinction unless proper management or conservation measures ...ed by the World Conservation Union (IUCN) as under extinction threat, and the new assessment proposes adding 12 more. A panel of 20 experts from 10 nations deter...

Volcanic eruptions, ancient global warming linked

...acidification of the world’s oceans and led to the extinction of numerous deep-sea species. Warming periods i...on of the ocean, corroded plankton shells, and the extinction of some bottom-dwelling organisms characterize the PETM. This interval occurred about 300,000 years ...

Dinosaur extinction didn't cause the rise of present-day mammals, claim researchers

...n adds: "Not only does this research show that the extinction of the dinosaurs did not cause the evolution of modern-day mammals, it also provides us with a wealth of other information. Vitally, scientists will be able to use the research to look into the future and identify species that will be at risk of ext...

Triple threat: World fin trade may harvest up to 73 million sharks per year

... Fauna (CITES), and 20 percent are threatened with extinction according to the 2006 Red List of Threatened Species. Used in shark fin soup, a delicacy served at Chinese weddings and other celebrations for centuries and more recently at business dinners in Southeast Asia and the Pacific Rim, fins are the most...

Good times ahead for dinosaur hunters, according to U of Penn scientist's dinosaur census

...t on the decline, in the time shortly before their extinction 65 million years ago. Dodson proposes that 1,850 ...e that dinosaur populations were stable before the extinction event that ended their reign of global dominance. Dodson, however, warns that the picture of the fo...

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