Environment

Carnivorous Squirrels Documented in California

A ground squirrel with cheeks stuffed with nuts, seeds or grains, is a common sight. But a new study provides the first evidence that California ground squirrels also hunt, kill and eat voles. The study, led by the University of Wisconsin-Eau Claire and the University of California, Davis, is the first to chronicle widespread carnivorous behavior among squirrels.

The High Cost of Carbon

The social cost of carbon — an important figure that global policymakers use to analyze the benefits of climate and energy policies — is too low, according to a study led by the University of California, Davis.

Shrubs Can Help or Hinder a Forest’s Recovery After Wildfire

New research from the University of California, Davis, is shedding light on when and where to plant tree seedlings to help restore forests after high-severity wildfires, and it has a lot to do with shrubs. 

In hotter, drier areas where natural regeneration is weaker, well-timed tree planting can boost recovery by up to 200%, but the outcome also depends on competition with shrubs, a paper in the journal Forest Ecology and Management concludes.

The Curious Life of California Oak Gall Wasps

Using long fruit pickers, a UC Davis research team fans out along Putah Creek, plucking the tiny homes of gall wasps from the branches of oak trees. These small, round growths, created by California oak gall wasps, protect their larvae. In the lab, researchers are raising the insects and searching for clues about this cryptic species that’s all around yet rarely noticed.

Extreme Weather Accelerates Nitrate Pollution in Groundwater

Extreme weather spurred by climate change, including droughts and heavy rains, may increase the risk of nitrates from fertilizers ending up in groundwater, according to a recent study from researchers at the University of California, Davis. The study found heavy rains after a drought caused nitrates to seep 33 feet under farm fields in as little as 10 days. The study was published in Water Resources Research.