ecology

The UC Davis College of Agricultural and Environmental Sciences, or CA&ES, is celebrating two outstanding graduate students recognized for their research, leadership and service in advancing regenerative agriculture, wildlife ecology and conservation and environmental sustainability.

After the sun sets and darkness falls over the vineyards near Lodi, American barn owls start to glide above the grapevines in search of rodents below. As the birds hunt, researchers at the University of California, Davis, and California State Polytechnic University, Humboldt, and San Luis Obispo, are paying attention to how noises echoing through the fields influence these nocturnal raptors.

Across an expanse of open grassland in Sacramento County, an eight-foot, stream cut bank holds dozens of mud-domed bird nests, where tiny heads peeked out before a colony of cliff swallows took flight. Cliff swallows are small migratory birds that arrive in the Central Valley each spring to breed, and while they now commonly nest on bridges and freeway overpasses, finding their nests built in a natural setting is a striking and special sight, particularly in California’s Central Valley.

Monarch butterfly populations have been declining since the 1990s, driven by several factors, including a changing climate. New research from the University of California, Davis suggests rising temperatures may be altering the behaviors monarch caterpillars use to survive, sometimes in ways that increase their risk of death.

As climate change drives up temperatures around the clock, warmer nights may be especially dangerous for caterpillars – causing them to grow fast but die young. University of California, Davis, researchers used hand warmers, a novel approach to warm field plots, to test the effects of higher temperatures at night.

Organic food is easy to find these days, from farmers markets to grocery stores. But organic farming covers only a small portion of California’s agricultural land. As the state pushes to make agriculture more climate-friendly, a new UC Davis-led research project is exploring why some regions are successfully shifting to sustainable practices – while others face more barriers to making the transition.

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.

On a campus where each budding scientist brings unique potential, a student organization at UC Davis recognizes that the future of science thrives on diverse voices and perspectives.

When Paulina González-Gómez was caught admiring baby birds chirping outside her classroom window, her third-grade teacher cautioned she wouldn’t make a living watching birds. Undeterred, she is now forging a career studying how changes in the environment influence the behavior, physiological traits and life cycles of birds.

On a sunny day in June, about 30 acres of land tucked along rolling hills just north of Capay were set on fire. Wearing a bright yellow, long sleeve shirt, long pants, leather gloves, hard hat and heavy-duty goggles, UC Davis Assistant Professor Emily Schlickman participated in her first prescribed burn, a planned and controlled fire that aims to help reduce wildfire risk.