Sentences with phrase «on bird populations»

The key result of the study is that with longer dry seasons and more intense seasonal drought, there is an overall negative effect on bird populations.

The positive impacts on bird populations are due to increased space and the presence of cattle.

Over the long term, these findings will help scientists understand the impact of climate and land - use changes on bird populations.

The study aimed to investigate the impacts of different programmes on bird populations.

Climate change and the increasing impact of polar bears on bird populations.

Recent research suggests that collisions with buildings and communication towers have no significant effect on bird populations.

In addition, they are carrying out similar studies to measure the effects on bird populations of «conventional» pollutants such as pesticides and other heavy metals, as well as new molecules such as perfluorinated compounds that are also accumulating in the Antarctic.

«This is a prime example of how intensive management of forest lands for industrial purposes can have a direct impact on bird populations in a positive way.»

As the UK's Royal Society for the Protection of Birds notes, in refreshingly straightforward language: «Despite the large numbers of birds killed, there is no scientific evidence that predation by cats in gardens is having any impact on bird populations UK - wide... It is likely that most of the birds killed by cats would have died anyway from other causes before the next breeding season, so cats are unlikely to have a major impact on populations.»

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.

West Nile virus has wreaked havoc mostly on bird populations, but humans and a variety of other animals can become infected as well when bitten by a mosquito that previously dined on an infected bird.

The U.S. National Parks offer strong protection for birds from many invasive and ecological threats, but little is known about the impact of climate change on bird populations living in the national parks.

«Scientist studies effects of wildfire management on bird populations.»

In fact, we need to take a long look at our own species» affect 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.

As Jim Steele's research on bird populations discovered, it was not climate change but landscape changes that had caused the wildlife declines and by acting locally the problem was remedied by restoring the watershed.

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

«That is completely unproven and projected effects of global warming on bird populations are unsubstantiated.»

Impact of urbanization on bird populations is evident from mortalities in cities.

«Despite the large numbers of birds killed, there is no scientific evidence that predation by cats in gardens is having any impact on bird populations UK - wide,» explains an article on the RSPB website.

A three - year study in Denmark concentrated on the non-crop habitats, such as hedgerows, of conventional and organic farms and their effects on bird populations.

But we need to ensure the use of materials like neodymium and concrete is kept to a minimum, that turbines use recycled materials wherever possible and that they are carefully sited to the reduce the already minimal impact on bird populations.»

I am sure people have read about the affects that rats have had on bird populations in the Aleutians Islands.

Interestingly enough, Forbush often presented enough context for his many exaggerated claims for the effects of cats on bird populations to discredit himself.

Shifting to renewable energy sources has been widely touted as one of the best ways to fight climate change, but even renewable energy can have a downside, as in the case of wind turbines» effects on bird populations.

To better understand the interacting effects of habitat degradation and climate on bird populations, researchers from the U.S. Forest Service Pacific Southwest Research Station (PSW), Klamath Bird Observatory, and Costa Rica Bird Observatories spent 12 years studying the White - collared Manakin, a fruit - eating tropical bird, in mature and young forests along the Caribbean coast of Costa Rica.

(The Condor: Ornithological Applications, May 6, 2015)-- Shifting to renewable energy sources has been widely touted as one of the best ways to fight climate change, but even renewable energy can have a downside, as in the case of wind turbines» effects on bird populations.

4: Cats and Birds in the Neighbourhood (core) After playing an active game of «tag» to learn the impact of unsupervised outdoor cats on the cats themselves and on bird populations, students explore what they can do to keep cats safe and save bird lives.

Even setting all that aside, the question remains: What impact does predation by cats have on bird populations?

The authors have no idea what impact these cats might have on bird populations — which is the stated purpose of their paper.

Shifting to renewable energy sources has been widely touted as one of the best ways to fight climate change, but even renewable energy can have a downside, as in the case of wind turbines» effects on bird populations.