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Tag: "extinction" at biology news

Ocean seep mollusks may share evolutionary history with other deep-sea creatures

...ore challenging, subject to changes in sea levels, extinction events, pollution, sediment runoff--all sorts of f...el and Little also found little evidence that mass extinction events or periods of low oxygen dealt significant blows to the seep communities. Seeps may have been...

Bacteria that use radiated water as food

...nean microorganisms were recent arrivals bound for extinction or whether they were permanent fixtures of an unlikely habitat. Also, many scientists have been skeptical of subsurface bacterial communities being completely disconnected from surface ecologies fed by the sun's light. Pratt, Princeton University g...

'Fruit fly dating game' provides clues to our reproductive prowess

...o thirds of all species in one of the largest mass extinction events in the history of life. It's that impact ?n...rta Keller, "because this impact predates the mass extinction and apparently didn't cause any extinctions." Keller is scheduled to present that evidence at the...

A human taste for rarity spells disaster for endangered species

...loitation and rarity that drives a species into an extinction vortex. This phenomenon, the authors explain, re...at low population densities, which increases their extinction risk. The authors' model now shows that humans can trigger an "anthropogenic Allee effect" in rare s...

Far more than a meteor killed dinos

...o thirds of all species in one of the largest mass extinction events in the history of life. It's that impact ?n...rta Keller, "because this impact predates the mass extinction and apparently didn't cause any extinctions." Keller is scheduled to present that evidence at the...

Man may have caused pre-historic extinctions

...istoric horses in Alaska may have been hunted into extinction by man, rather than by climate change as previousl...hat the wild horses became extinct long before the extinction of mammoths and the arrival of humans from Asia - ruling out the possibility that they were over-hun...

Race to halt global amphibian crisis boosted by rediscovery of endangered Colombian frogs

...and the world a unique jewel that will prevent the extinction of threatened species of birds and frogs found now...roAves president and an active herpetologist. "The extinction crisis is wiping out so many important environmental indicator species, such as Atelopus frogs, befo...

All the eggs in one basket

... According to the researchers, "The ecological extinction of green turtles transformed an ecosystem with diverse species of seagrass dominated by large herbivores into a detritus-based ecosystem dominated by overgrown monocultures of one species of grass." Green turtles feed mostly on turtle grass, while ...

UNH researcher restoring oyster reefs to Great Bay

...from exuberant overharvesting. "We have seen local extinction on some reefs," says Ray Grizzle, research associate professor at the University of New Hampshire's Jackson Estuarine Laboratory. Now Grizzle is working to bring oysters back to Great Bay ?lots of them. He's helping the state of New Hampshire meet ...

Agriculture and tropical conservation: rethinking old ideas

...perate this way, with a continual process of local extinction and re-migration. When you couple that ecological ...on't travel through them to repopulate areas where extinction has occurred. But that's not the case if the intervening areas are traditional "agroforests"---farms...

Colombian frog believed extinct found alive

...s that feed on mosquitoes carrying the disease. An extinction crisis among amphibians indicates drastic environmental changes caused by human impact such as deforestation and global warming. ...

Ready, set, mutate?and may the best microbe win

...of the fermentor. Three of the five were driven to extinction within a couple of days, and the final two fought it out over the remaining three weeks of the test. The research included a raft of additional experiments as well. The team characterized each of the mutant proteins to document precisely how it aide...

New tiger report release: Tiger habitat down from just a decade ago

...e populations like tigers are highly vulnerable to extinction in small and isolated reserves. Half the 76 landscapes can still support 100 tigers or more, providing excellent opportunities for recovery of wild tiger populations. The largest tiger landscapes exist in the Russian Far East and India. Southeast A...

Insect predation sheds light on food web recovery after the dinosaur extinction

...very of biodiversity after the end-Cretaceous mass extinction was much more chaotic than previously thought, acc... out of balance, not linked as they are today. The extinction took place 65.5 million years ago. Labeled the K-T extinction, it marks the beginning of the Cenozoi...

Crucial site for endangered frogs and birds saved

... save several species of birds and amphibians from extinction shows the importance of conservation partnerships such as the Alliance for Zero Extinction," said Claude Gascon, CI's senior vice president for regional programs. "By working together, we were able to forever protect a site identified by AZE as the l...

Invasive exotic plants helped by natural enemies

...any of the resident herbivores have been hunted to extinction by early settlers, often times to make room for their own domesticated and feral herbivores from the old world," said Parker. He also noted that this radical shift in herbivore composition may favor exotic plants over natives. Recent research, incl...

Scientists discover dozens of new species in 'Lost World' of western New Guinea

...ecies. Large mammals that have been hunted to near extinction elsewhere were here in abundance. We were able to simply pick up two Long-Beaked Echidnas, a primitive egg-laying mammal that is little known." The discoveries solved one major ornithological mystery ?the location of the homeland of Berlepsch's Six-...

Climate change drives widespread amphibian extinctions

...species around the world teetering on the brink of extinction or has already pushed them into the abyss. "Disease is the bullet that's killing the frogs," said J. Alan Pounds, the study's lead scientist affiliated with the Tropical Science Center's Monteverde Cloud Forest Preserve in Costa Rica. "But climate c...

Extinctions linked to climate change

...new report that links global warming to the recent extinction of dozens of amphibian species in tropical America...plex relationship between global warming and major extinction of species. "This new study is a breakthrough, and the powerful synergy between pathogen transmiss...

Ancient DNA provides clues to the evolution of social behavior

... she says. ''They're the survivors of the last big extinction event, so it seems logical to me that we should know how they did that.'' ...

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