Scientists checked in on species all over the country for the latest State of the Birds report. Nearly everywhere they looked, birds were struggling—including some that have been resilient in ...

2000), in addition to the high rates of species extinctions already occurring worldwide (Stork 2010). Biodiversity is a term that can be used to describe biological diversity at a variety of ...

State of the Birds report identifies 112 "tipping point" species — those that have lost more than half their populations in ...

Report to Yellowstone National Park ... Food web complexity and species diversity. American Naturalist 100, 65–75 (1966). Paine, R. T. A note on trophic complexity and community stability.

“This report reinforces the growing scientific alarm that birds across North America are falling victim to the extinction crisis in greater and greater numbers,” said Noah Greenwald, endangered ...

From this the number and frequency of alleles determines the genetic diversity of the population. If one population of a species dies out then the species may lose some of its genetic diversity.

A new report released on the state of birds in the country is sounding the alarm. Bird populations across nearly every ...