Forest and Rangeland Ecosystem Science Center (FRESC)

Publications

Filter Total Items: 1,571
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Year Published: 2019

Anticoagulant rodenticides in Strix owls indicate widespread exposure in west coast forests

Exposure of nontarget wildlife to anticoagulant rodenticides (AR) is a global conservation concern typically centered around urban or agricultural areas. Recently, however, the illegal use of ARs in remote forests of California, USA, has exposed sensitive predators, including the federally threatened northern spotted owl (Strix occidentalis...

Wiens, David; Dilione, Krista E.; Eagles-Smith, Collin A.; Herring, Garth; Lesmeister, Damon B.; Gabriel, Mourad W.; Wengert, Greta; Simon, David C.

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Year Published: 2019

Floodplains provide important amphibian habitat despite multiple ecological threats

Floodplain ponds and wetlands are productive and biodiverse ecosystems, yet they face multiple threats including altered hydrology, land use change, and non‐native species. Protecting and restoring important floodplain ecosystems requires understanding how organisms use these habitats and respond to altered environmental conditions. We developed...

Holgerson, Meredith; Duarte, Adam; Hayes, Marc; Adams, Michael J.; Tyson, Julie A.; Douville, Keith; Strecker, Angela

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Year Published: 2019

Adding invasive species bio-surveillance to the U.S. Geological Survey streamgage network

The costs of invasive species in the United States alone are estimated to exceed US$100 billion per year so a critical tactic in minimizing the costs of invasive species is the development of effective, early-detection systems. To this end, we evaluated the efficacy of adding environmental (e)DNA surveillance to the U.S. Geological Survey (USGS)...

Sepulveda, Adam J.; Schmidt, Christian; Amberg, Jon J.; Hutchins, Patrick R.; Stratton, Christian; Mebane, Christopher A.; Laramie, Matthew; Pilliod, David

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Year Published: 2019

Wetland management strategy to reduce mercury export in water and bioaccumulation in fish

Wetland environments provide numerous ecosystem services but also facilitate methylmercury (MeHg) production and bioaccumulation. We developed a wetland‐management technique to reduce MeHg concentrations in wetland fish and water. We physically modified seasonal wetlands by constructing open‐ and deep‐water treatment cells at the downstream end of...

Ackerman, Joshua T.; Fleck, Jacob; Eagles-Smith, Collin A.; Marvin-DiPasquale, Mark C.; Windham-Myers, Lisamarie; Herzog, Mark P.; McQuillen, Harry L.

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Year Published: 2019

Decision analysis for the reintroduction of Bull Trout into the lower Pend Oreille River, Washington

The decision to reintroduce a species can be difficult owing to conflicting opinions and objectives, as well as uncertainty of the outcome. Structured decision making addresses these considerations by identifying realistic fundamental objectives and building achievable management alternatives, within a quantitative modeling framework. The process...

Benjamin, Joseph R.; Brignon, William R.; Dunham, Jason B.

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Year Published: 2019

Climate vulnerability assessment for Pacific salmon and steelhead in the California Current Large Marine Ecosystem

Major ecological realignments are already occurring in response to climate change. To be successful, conservation strategies now need to account for geographical patterns in traits sensitive to climate change, as well as climate threats to species-level diversity. As part of an effort to provide such information, we conducted a climate...

Crozier, Lisa G; McClure, Michelle M; Beechie, Tim J.; Bograd, Steven J.; Boughton, David A.; Carr, Mark H.; Cooney, Thomas D.; Dunham, Jason B.; Greene, Correigh M.; Haltuch, Melissa A; Hazen, Elliott L; Holzer, Damon M; Huff, David D.; Johnson, Rachel C.; Jordan, Chris E; Kaplan, Issac C; Lindley, Steven T; Mantua, Nathan J; Moyle, Peter B.; Myers, James M; Nelson, Mark W; Spence, Brian C; Weitkamp, Laurie A.; Williams, Thomas H.; Willis-Norton, Ellen
Crozier LG, McClure MM, Beechie T, Bograd SJ, Boughton DA, Carr M, et al. (2019) Climate vulnerability assessment for Pacific salmon and steelhead in the California Current Large Marine Ecosystem. PLoS ONE 14(7): e0217711. https://doi.org/10.1371/journal.pone.0217711

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Year Published: 2019

Application of multiple-population viability analysis to evaluate species recovery alternatives

Population viability analysis (PVA) is a powerful conservation tool, but one that remains unapproachable for many species. This is particularly true for species with multiple, broadly-distributed populations for which collecting suitable data can be challenging. A recently-developed method of multiple population viability analysis (MPVA),...

Neville, Helen M.; Leasure, Douglas R.; Dauwalter, Daniel C.; Dunham, Jason B.; Bjork, Robin; Fesenmyer, Kurt A.; Chelgren, Nathan; Peacock, Mary M.; Luce, Charles H; Isaak, Daniel J.; Carranza, Lee Ann; Sjoberg, Jon; Wengerd, Seth J.

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Year Published: 2019

Freezing resistance, safety margins, and survival vary among big sagebrush populations across the western United States

PremisePhysiological responses to temperature extremes are considered strong drivers of species’ demographic responses to climate variability. Plants are typically classified as either avoiders or tolerators in their freezing‐resistance mechanism, but a gradient of physiological‐threshold freezing responses may exist among individuals of a...

Lazarus, Brynne; Germino, Matthew J.; Richardson, Bryce A.
Lazarus, B.E., Germino, M.J., Richardson, B., 2019, Freezing resistance, safety margins, and survival vary among big sagebrush populations across the western United States: American Journal of Botany, p. online, https://doi.org/10.1002/ajb2.1320

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Year Published: 2019

Timber harvest alters mercury bioaccumulation and food web structure in headwater streams

Timber harvest has many effects on aquatic ecosystems, including changes in hydrological, biogeochemical, and ecological processes that can influence mercury (Hg) cycling. Although timber harvest’s influence on aqueous Hg transformation and transport are well studied, the effects on Hg bioaccumulation are not. We evaluated Hg bioaccumulation,...

Willacker, James; Eagles-Smith, Collin A.; Kowalski, Brandon M; Danehy, Robert J; Jackson, Allyson K.; Adams, Evan M.; Evers, David C.; Eckley, Chris S.; Tate, Michael T.; Krabbenhoft, David P.

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Year Published: 2019

Lidar-based approaches for estimating solar insolation in heavily forested streams

Methods to quantify solar insolation in riparian landscapes are needed due to the importance of stream temperature to aquatic biota. We have tested three lidar predictors using two approaches developed for other applications of estimating solar insolation from airborne lidar using field data collected in a heavily forested narrow stream in western...

Richardson, Jeffrey J; Torgersen, Christian E.; Moskal, L Monika

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Year Published: 2019

Effects of experimental removal of Barred Owls on population Demography of Northern Spotted Owls in Washington and Oregon—2018 Progress Report

Populations of Northern Spotted Owls (Strix occidentalis caurina; herineafter referred to as Spotted Owl) have declined throughout the subspecies’ geographic range. Evidence indicates that competition with invading Barred Owls (S. varia) has contributed significantly to those declines. A pilot study in California showed that removal of Barred Owls...

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., 2019, Effects of Barred Owl (Strix varia) removal on population demography of Northern Spotted Owls (Strix occidentalis caurina) in Washington and Oregon, 2015–18: U.S. Geological Survey Open-File Report 2019-1074, 17 p., https://doi.org/10.3133/ofr20191074.

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Year Published: 2019

Rapid broad-scale ecosystem changes and their consequences for biodiversity

Biodiversity contributes to and depends on ecosystem structure and associated function. Ecosystem structure, such as the amount and type of tree cover, influences fundamental abiotic variables such as near-ground incoming solar radiation (e.g., Royer et al. 2011), which in turn affects species and associated biodiversity (e.g., Trotter et al. 2008...

Breshears, David D.; Field, Jason P.; Law, Darin J.; Villegas, Juan C.; Allen, Craig D.; Cobb, Neil S.; Bradford, John B.
Breshears, D.D., Field, J.P., Law, D.J., Villegas, J.C., Allen, C.D., Cobb, N.S., and Bradford, J.B., 2019, Rapid broad-scale ecosystem changes and their consequences for biodiversity, in Lovejoy, T.E., and Lee, H., eds., Biodiversity and climate change--Transforming the biosphere: New Haven, Yale University Press, p. 80-90.