Sentences with phrase «densities on bird populations»

Forty of these species are often present in urban or suburban landscapes, where impacts of high cat densities on bird populations have been demonstrated elsewhere.

Not exact matches

Research Assistant, Institute of Ecosystem Studies, NY (May 00 — Aug 00) The interactions of tree regeneration, rodent and bird populations, and tick density and their effect on the risk of human exposure to vector - borne disease.

Counting Cats and Counting Birds In both studies, the authors quantified the impact of cat predation on bird populations by comparing different levels of predation with different bird densities.

On islands and in fragmented urban and suburban habitats unnaturally high densities of cats are not only capable of reducing or eradicating populations of birds and small mammals, they can out - compete native predators like foxes and weasels.