A recent sampling from two California streams found nearly all juvenile salmon were infected with deadly parasites, and conditions are expected to worsen.

Watch one scurry around upside down in a remarkably unusual form of locomotion.

A population explosion that began late last year has yet to abate. Meanwhile, researchers are exploring novel approaches to combat the nonnative species.

Six GPS-tracked wild cats wandered closer to Santa Cruz, California, and surrounding towns as human activity died down under shelter-in-place orders last March.

Turkish officials are scrambling to clean up a massive, gooey plankton bloom that’s sliming the country’s ports and could suffocate the area’s marine ecosystems.

Having two different endosymbionts may allow the ciliate Pseudoblepharisma tenue to live in both oxygen-rich and oxygen-poor zones of the muddy bogs of southern Germany.

Researchers find a widespread decline in dissolved oxygen levels in lakes, which is known to reshape ecosystems.

The New Mexico State University soil microbiologist uses molecular tools to understand how fungi are adapting to a warming world and what that might mean for global nutrient cycles.

More and more people are traveling around the world to watch the luminous displays of fireflies, but tourism-related light pollution and habitat degradation threaten to snuff out the insects at some locations.  

In areas where gray wolf populations have grown, motorists have fewer collisions with deer, likely due to the predators keeping deer away from roadways.

Throughout his career, the University of California, Berkeley, herpetologist named 144 species of salamanders.

For the first time, scientists tracked large shark movements during hurricanes and found that tiger sharks may find the turmoil opportunistic for feeding.

In the book’s introduction, “Connections,” Suzanne Simard relates how her “perception of the woods has been turned upside down.”

The Centenary University professor studies the far-reaching effects of changes in the gut bacteria of mosquitos and other species.

Feeding the world’s insatiable appetite for wood products is sacrificing the future of a crucial ecosystem.

Whether the galls that aphids make on witch hazel leaves are red or green is associated with a gene expressed in the insects’ salivary glands.

Dyck was widely respected for working alongside indigenous groups as he studied polar bears on their ancestral lands.

In Northern California, the proportion of ticks infected with the bacterium Borrelia burgdorferi was the same in shrubland along beaches as in woodland habitats.