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Tag: "habitat" at biology news

Threats to wild tigers growing

... made from tiger parts and tiger skins, along with habitat loss and fragmentation, is believed to be the chief reason for the losses. The assessment, by Eric Dinerstein of the World Wildlife Fund and 15 coauthors, describes the wild tiger's population trajectory as "catastrophic" and urges international coop...

Researchers find 24 species believed new to science in Suriname rainforest

...treams and preventing fragmentation of the natural habitat from unchecked or poorly planned development. The Guayana Shield region contains the largest undisturbed tropical rainforest on the planet, a northern Amazon tract three times larger than the U.S. state of Texas (twice the size of Ethiopia) that i...

Caribbean frogs started with a single, ancient voyage on a raft from South America

...he study now are believed to be extinct because of habitat degradation and possibly other causes such as climate change. A recent global assessment of amphibians found that the Caribbean Islands have the highest proportion of amphibian species threatened with extinction. Hedges and coauthor William Duellma...

Massive herds of animals found to still exist in Southern Sudan

.... The team also identified a key zone of semi-arid habitat supporting several species, which will be proposed as a new protected area. (OVER) In an effort to protect this newly discovered natural resource, WCS has signed cooperation agreements with both GoSS and its Ministry of Environment, Wildlife Co...

Ice Age extinction claimed highly carnivorous Alaskan wolves

...ern descendents. After the extinction, the Alaskan habitat was probably recolonized by wolves that survived south of the ice sheet in the continental United States, Leonard said. The ancient Alaskan wolves differed from modern wolves not only in their genes, but also in their skulls and teeth, which were ...

Want to save polar bears? Follow the ice

...ing the bears themselves, but the receding sea ice habitat that may drastically shrink as a result of global ...s to more accurately predict where sea ice—a vital habitat for polar bears and seals that they prey on—will remain into the near future. "The polar bear co...

Lessons from the orangutans: Upright walking may have begun in the trees

...animals are seriously endangered, primarily due to habitat destruction. "If you can understand how they c...rn about effects that living in logged or degraded habitat would have on their locomotion. These could affect energy levels, for example, if they have to go to...

Hearts of male and female rainbow trout are different

...iac energy metabolism and function may help define habitat suitability, swimming capabilities and health status of wild and hatchery-reared rainbow trout, and human heart disease, sex-specific treatment. ...

Amphibians in losing race with environmental change

...opulation declines, including UV-B light exposure, habitat loss, pesticide pollution, infections and other issues," said Andrew Blaustein, a professor of zoology at OSU and one of the world's leading experts on amphibian decline. "But looked at in a different way, it's not just that there are threats and ...

Invasion of the island bats

... conservation importance of the West Indies, where habitat loss and climate change —embodied in the intensification of hurricanes?threaten natural habitats more acutely than on the continent. ...

Parasites' impact goes beyond host to affect ecosystem

... seven percent ?but they are an important food and habitat resource for a variety of organisms. Over the three-and-a-half-week field experiment, ephemeral algae increased 186 percent in the no-snails control cage and 59 percent in the cage of infected snails; it decreased by six percent in the uninfected sna...

Rare soft-shell turtle, nesting ground found in Cambodia

... hunters due to its size and edibility, as well as habitat destruction from dams, irrigation and dredging. The stretch of Mekong River where the turtle lives is an area closed for many years to scientific exploration because it was one the last strongholds of the former Khmer Rouge regime in Cambodia. The...

In Iran, cheetahs collared for the first time

..., Asiatic cheetahs now live only in extremely arid habitat on the edges of Iran's Kavir Desert. WCS's governm... of the 1979 revolution, along with degradation of habitat due to livestock grazing, have pushed this important predator to the brink of extinction. Historica...

Paper challenges 1491 Amazonian population theories

... vocalization that there was much more widespread habitat transformation; that you still had a bulk of people along the river but their influence extended deep into the forest. It's still nebulous, and difficult to get people to map stuff, or put hard numbers on it, but there is a sentiment that the Amazoni...

New species of snapper discovered in Brazil

...protection live in mangroves, then migrate to reef habitat and deeper areas as adults. "Several species spend some of their lives in these different yet connected habitats," Lindeman said. "That's why it's so important to develop integrated conservation strategies that include mangroves, deep reefs and ot...

Iowa State University botanists identify new species of North American bamboo

...tion projects because it's native and was used for habitat by so many different animals, especially birds." Clark and Triplett began looking at the North American bamboos as part of a larger collaboration with botanists worldwide to develop an evolutionary family tree of bamboo species. They're using mod...

Yale biologists 'trick' viruses into extinction

...f the bacteria cells it infects." In ecology, a habitat that supports population growth is termed a "source," whereas a non-supportive habitat is a "sink." This study reported on the success of phi-6 virus populations in environments containin...

What's in the water? Estrogenic activity documented in fish caught in Pittsburgh's rivers

...ironment, and can concentrate chemicals from their habitat within their bodies, these results suggest that feminizing chemicals may be making their way into the region's waterways. The study, abstract number 3458, being presented at the annual meeting of the American Association for Cancer Research, April ...

Amur leopard still on the brink of extinction, scientists say

...v, a mature leopard needs 500 square kilometers of habitat with good forests and high and stable amounts of ungulates, including deer. Two to four female leopards would live in the same amount of land, reproduce and nourish their cubs. "Maybe this is the reason why leopards practically completely disappea...

Computer scientists join in search for ivory-billed woodpecker

...rch and understand what can be done to improve the habitat for this bird," he said. "We're pleased to be working alongside our partners in this ambitious venture." CONE purposes to help natural scientists observe animals ?whether birds or mammals ?in the animals' habitats. Song and Goldberg have develope...

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