ecological

Vultures thus fulfil an important ecological role by cleaning landscapes of carrion and containing the spread of wildlife diseases.

According to basic ecological theory, two different species cannot exist on the same limiting resource -- the better competitor is expected to drive the other to extinction.

The research showed that starting with a higher diversity of planted native trees on each island can lead to a greater variety of ecological plant strategies colonizing the tree islands.

Animal behavior experiments in the wild provide valid social and ecological contexts but they are challenging to design and to control.

He framed his highest priority — the preservation of the white race — in environmental, even ecological, terms.