Many North American migratory birds are shrinking in size as temperatures have warmed over the past 40 years.

A century after scientists first noted that the environment contributes to the evolution of adaptive differences among plant populations, scientists are on the verge of figuring out how that adaptation happens — by combining results from huge “common garden” experiments with genomic sequencing.

Tropical forests are being cleared for agriculture and other uses at alarming rates.

Some plants and patches of Earth withstand heat and dry spells better than others. A new Stanford University study shows those different coping mechanisms are closely linked to wildfire burn areas, posing increasing risks in an era of climate change.

At the southeast tip of a large valley in the northern Sierra Madre Oriental is the small Mexican town of Estanque de Norias, some 200 miles west of the Texas border at Laredo.

California’s native salmon have been harmed by more than a century of mining, dam building, floodplain reclamation, fishing pressure, hatchery practices, and introduced predators.

There is no crystal ball to tell ecologists how forests of the future will respond to the changing climate, but a University of Arizona-led team of researchers may have created the next best thing.

In one of the first studies of its kind, researchers have gauged how biodiversity loss of birds and mammals will impact plants’ chances of adapting to human-induced climate warming.

A study led by Simon Fraser University researchers has discovered that sufficient water flows during summer can be critical to a Chinook salmon population in the interior of British Columbia.

Air pollution may be making it harder for bees and other insects to follow the scent of flowers, reducing pollination by as much as a third, new research suggests.