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Tag: "predator" at biology news

Super predators and mass extinctions

...munity is disrupted when mutations lead to a super predator that quickly decimates the prey population, which in turn leads to its own demise. The few creatures that survive the predatory apocalypse gradually mutate to fill the existing ecological niches - and the cycle begins again. The period of the cycle ...

Gray wolves maintain the food chain in winter

...ecies in Yellowstone Park can be buffered by a top predator - the reintroduced gray wolf (Canis lupus). Gray ...h and Wildlife Service reintroduced the persecuted predator into Yellowstone. Wilmers and Getz used data from the past 50 years to establish winter trends and m...

Rats infected as newborns grew up vulnerable to memory problems during an immune challenge

...for example remembering nest sites, food sites and predator vicinities, as well as for fitness, for example remembering territories and potential mate locations." Bilbo stresses that adults rats who were not infected as pups do not suffer memory impairment as the result of adult infection, and those who were...

Falling ants glide back to trunk to avoid dangers of forest floor

... the tree, safe from both the litter below and the predator above." All told, Yanoviak has dropped about 60 species of ants from the treetops, and has found some form of gliding ?what he and his colleagues call directed aerial descent ?in 25 species representing five separate genera. It is the norm in only t...

Genome of deadly amoeba shows surprising complexity, evidence of lateral gene transfer

...ole in the project. E. histolytica is a voracious predator of bacteria and shares a close relationship in the human gut with its bacterial neighbors. Because the parasite uses the same methods to kill bacteria as it uses to damage human cells and cause disease, the level of certain bacteria in the colon can ...

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