Lake Tahoe’s long-term clarity record is not trending worse, nor is it improving, according to the 2024 annual clarity report from the University of California, Davis’ Tahoe Environmental Research Center (TERC).

For years, families in the Bay Area city of Richmond have lived with smoke and chemicals drifting from a nearby oil refinery. That kind of exposure poses serious health risks, but a new report from UC Davis shows how California’s Assembly Bill (AB) 617 is helping residents take a more active role in monitoring and reducing air pollution in their neighborhoods.

Sama Reitzes is all about building stronger communities through good food, sustainable practices and making gardening accessible to everyone. The UC Davis alum earned a bachelor’s degree in agricultural and environmental education last winter and continues to grow that work on campus, where she’s joined efforts to install a new ADA-accessible garden and make green spaces more inclusive for all.

The wind was whipping across a dark, open field near the southern edge of Yolo County when two small burrowing owls suddenly burst into flight. For a team of birders from UC Davis, the birds marked the 173rd species of the day, breaking a county record that had stood for 25 years.

It was the exciting conclusion of their “Big Day,” a fast-paced birding challenge to find and identify as many bird species as possible in a 24-hour period. Their effort – spanning 150 miles of driving, 17 miles of walking and 41 stops – combined careful planning with a love of birds.

The call of American bullfrogs was deafening when scientists from the University of California, Davis, first began researching the impact of invasive bullfrogs on native northwestern pond turtles at Yosemite National Park.

“At night, you could look out over the pond and see a constellation of eyes blinking back at you,” said UC Davis Ph.D. candidate Sidney Woodruff, lead author of a study chronicling the effects of removal. “Their honking noise is iconic, and it drowns out native species’ calls.”

From a small California winery to a large-scale energy project in China, floating photovoltaics — or “floatovoltaics”— are gaining in popularity. Commonly installed over artificial water bodies, from irrigation ponds and reservoirs to wastewater treatment plants, floating solar projects can maximize space for producing clean energy while sparing natural lands.

Home is where the perch is: Two peregrine falcons may be turning the UC Davis water tower into their new nesting spot. Andrew “Andy” Engilis Jr., ornithologist and curator of the UC Davis Museum of Wildlife and Fish Biology, spotted a pair of the birds during the first week of April after hearing a loud, high-pitched “scree, scree” outside his office in the Academic Surge building.

UC Davis Professor Hugh Safford was hiking for pleasure in California’s High Sierra when he stumbled upon a new elevation record for the Jeffrey pine, which may now be the state’s highest-altitude tree. His serendipitous finding is published in Madroño, a journal of the California Botanical Society.

Platforms such as iNaturalist and eBird encourage people to observe and document nature, but how accurate is the ecological data that they collect?

Almost everywhere in California, salmon are on the decline. But in Putah Creek — a restored stream running through the University of California, Davis, campus — wild salmon are not only increasing, they also are completing their life cycle.