Forest and Rangeland Ecosystem Science Center (FRESC)
Scientists from the Forest and Rangeland Ecosystem Science Center capitalize on their diverse expertise to answer scientific questions shaped by the environments of the western United States. We collaborate with each other and with partners to provide rigorous, objective, and timely information and guidance for the management and conservation of biological systems in the West and worldwide.
The Cosumnes River watershed has seasonal, non-point source hotspots for total mercury and methylmercury production, which discharge to the Sacramento-San Joaquin River Delta in north-central California. To reduce mercury loads to the Delta, researchers created open-water deep cells at the downstream end of wetlands.
In a study led by the USGS, researchers developed a framework to infer inbreeding rates of Northern Spotted Owls when incomplete parentage information exists.
In the western U.S., big sagebrush ecosystems provide habitat for about 350 species of conservation concern, but are sensitive to disturbance and are in decline. Big sagebrush ecosystems have low and variable precipitation, which makes restoration a challenge.
Variation in inbreeding rates across the range of Northern Spotted Owls (Strix occidentalis caurina): Insights from over 30 years of monitoring data
Inbreeding has been difficult to quantify in wild populations because of incomplete parentage information. We applied and extended a recently developed framework for addressing this problem to infer inbreeding rates in Northern Spotted Owls (Strix occidentalis caurina) across the Pacific Northwest, USA. Using pedigrees from 14,187 Northern Spotted...Miller, Mark P.; Haig, Susan M.; Forsman, Eric D.; Anthony, Robert G.; Diller, Lowell; Dugger, Katie M.; Franklin, Alan B.; Fleming, Tracy L.; Gremel, Scott; Lesmeister, Damon B.; Higley, Mark; Herter, Dale R.; Sovern, Stan G
Chapter 4: Northern spotted owl habitat and populations: Status and threats
The northern spotted owl (Strix occidentalis caurina) was listed as threatened under the Endangered Species Act in 1990 (USFWS 1990). Providing adequate amounts of suitable forest cover to sustain the subspecies was a major component of the first recovery plan for northern spotted owls (USFWS 1992) and a driver in the basic reserve design and old-...Lesmeister, Damon B.; Davis, Ramond J; Singleton, Peter H; Wiens, David
Critically assessing the utility of portable lead analyzers for wildlife conservation
Lead (Pb) exposure in wildlife is a widespread management and conservation concern. Quantitative determination of Pb concentrations in wildlife tissues is the foundation for estimating exposure and risk. Development of low‐cost, portable instruments has improved access and cost‐effectiveness of determining Pb concentrations in blood samples, while...Herring, Garth; Eagles-Smith, Collin A.; Bedrosian, Bryan; Craighead, Derek; Domenech, Robert; Langner, Heiko W.; Parish, Chris N.; Shreading, Adam; Welch, Alacia; Wolstenholme, Rachel