Sentences with phrase «bird populations start»

«One of the most important observations was that after maintenance efforts end, the wetland bird populations start to decline.

Once La Niña comes around, disparate bird populations start to mingle again, increasing the likelihood that a carrier is infected with more than one variety of the virus.

Then Westerners arrived and bird populations started to disappear more quickly due to a combination of threats, including habitat loss, introduction of invasive species and the arrival of diseases such as avian malaria.

Not exact matches

Graduate student Nancy Chen, a population genetics fellow now at the University of California, Davis, started by sequencing the full genome of a reference scrub jay, and then assessed the genetic differences of all 3800 individual birds followed by the Florida group.

The effects of waste on larger animals, including birds with stomachs full of plastic, have garnered significant attention, he says, but «when you start altering [whole] populations,... that's when you get these true impacts.»

The eBird is sort of a revolutionary new Internet - based tool that allows anybody from amateur to professional to put in bird sightings from anywhere in much of the western hemisphere right now; it may be worldwide eventually and assemble all that data into one place, so that we can start understanding how birds move, how their populations change.

Feral cats also bring pests like fleas and ticks, and they can start to affect the environment by preying on natural bird and rodent populations.