Sentences with phrase «on bird populations demonstrated»

Research showing prospective effects of climate change on bird populations demonstrated a need for prevention, one approach being renewable energy.

Not exact matches

The calculations (from 304 birds rescued at an average distance of 4,833 metres from their nearest colonies) demonstrate that at least 1 % of the fledglings produced each year by the population are found on the ground due to light pollution.

``... the ecological and conservation significance of these kill tallies is difficult to contextualise, because (1) there are no reliable estimates of the total population of birds in Australia; (2) predation may fall disproportionately on some bird species; (3) some bird species may be able to sustain high mortality rates and maintain viable populations but others may not; and (4) as demonstrated here, there is substantial spatial variation in the numbers and proportion of birds killed across Australia.»

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.