Forest and Rangeland Ecosystem Science Center (FRESC)

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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. 

FRESC Research Teams

FRESC Research Teams

FRESC scientists, individually or collaboratively with partners, investigate high-priority questions about biological systems.

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Explore one of FRESC's many research programs.

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Date published: August 6, 2020

Modeling Effects of Climate Change on Stream Temperature: Implications for Coldwater Fishes

Resource managers need more accurate information about how cold-water habitats for fish will change in the future. 

Date published: August 5, 2020

Can Nutrient Additions Facilitate Recovery of Pacific Salmon?

Multiple restoration actions have been implemented in response to declining salmon populations, including adding salmon carcasses or artificial nutrients to mimic marine-derived nutrients historically provided by large spawning runs of salmon. 

Date published: July 21, 2020

Assessment of Mercury Bioaccumulation in US National Parks Using Citizen Science

A team of federal, academic, and NGO researchers conducted a national-scale assessment of mercury bioaccumulation in aquatic ecosystems using dragonfly larvae as biosentinels.

Publications

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Year Published: 2020

Effects of barred owl (Strix varia) removal on population demography of northern spotted owls (Strix occidentalis caurina) in Washington and Oregon—2019 annual report

Strix occidentalis caurina (northern spotted owl; hereinafter referred to as spotted owl) have rapidly declined throughout the subspecies’ geographic range. Competition with invading Strix varia (barred owl) has been identified as an immediate cause of those declines. A pilot study in California showed that removal of barred owls coupled with...

Wiens, J. David; Dugger, Katie M.; Lesmeister, Damon B.; Dilione, Krista E.; Simon, David C.
Wiens, J.D., Dugger, K.M., Lesmeister, D.B., Dilione, K.E., and Simon, D.C., 2020, Effects of barred owl (Strix varia) removal on population demography of northern spotted owls (Strix occidentalis caurina) in Washington and Oregon—2019 annual report: U.S. Geological Survey Open-File Report 2020–1089, 19 p., https://doi.org/10.3133/ofr20201089.

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Year Published: 2020

Land-cover and climatic controls on water temperature, flow permanence, and fragmentation of Great Basin stream networks

The seasonal and inter-annual variability of flow presence and water temperature within headwater streams of the Great Basin of the western United States limit the occurrence and distribution of coldwater fish and other aquatic species. To evaluate changes in flow presence and water temperature during seasonal dry periods, we developed spatial...

Gendaszek, Andrew S.; Dunham, Jason B.; Torgersen, Christian E.; Hockman-Wert, David P; Heck, Michael; Thorson, Justin Martin; Mintz, Jeffrey Michael; Allai, Todd

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Year Published: 2020

A national-scale assessment of mercury bioaccumulation in United States National Parks using dragonfly larvae as biosentinels through a citizen-science framework

We conducted a national-scale assessment of mercury (Hg) bioaccumulation in aquatic ecosystems using dragonfly larvae as biosentinels, by developing a citizen science network to facilitate biological sampling. Implementing a carefully designed sampling methodology for citizen scientists, we developed an effective framework for landscape-level...

Eagles-Smith, Collin; Willacker, James; Nelson, Sarah J.; Flanagan Pritz, Collen M; Krabbenhoft, David P.; Chen, Celia Y.; Ackerman, Joshua T.; Campbell Grant, Evan H.; Pilliod, David