ecosystem

From the looks of it, mistletoe is a keystone species and plays a crucial role in that forest ecosystem.

Experts generally consider known mortality to represent about half of actual grizzly bear deaths for the ecosystem.

Bats are crucial to the ecosystem, performing extremely valuable jobs like pollination and insect control.

Even in the most sophisticated echelons of the media ecosystem, the fix was in.

Over the next decade, the RETs wreaked havoc on the ecosystem, eating ducklings, small water birds, and other amphibians.

Familiarity with the biological components of an ecosystem is essential to meaningful radiobiological assessment.

Often little or no data are available to indicate the previous state of the ecosystem or the rate of degradation.

In some areas, nomads moving to less arid areas disrupt the local ecosystem and increase the rate of erosion of the land.

In these marginal areas, human activity may stress the ecosystem beyond its tolerance limit, resulting in degradation of the land.