Publications
Filter Total Items: 2071
Wetland management strategy to reduce mercury export in water and bioaccumulation in fish 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 seasonal wetlands to promote naturally...
Authors
Joshua T. Ackerman, Jacob Fleck, Collin A. Eagles-Smith, Mark C. Marvin-DiPasquale, Lisamarie Windham-Myers, Mark P. Herzog, Harry L. McQuillen
Decision analysis for the reintroduction of Bull Trout into the lower Pend Oreille River, Washington 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 is driven by participation of...
Authors
Joseph R. Benjamin, William R. Brignon, Jason B. Dunham
Climate vulnerability assessment for Pacific salmon and steelhead in the California Current Large Marine Ecosystem 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 vulnerability assessment that included all Pacific...
Authors
Lisa G Crozier, Michelle M McClure, Tim J. Beechie, Steven J. Bograd, David A. Boughton, Mark H. Carr, Thomas D. Cooney, Jason B. Dunham, Correigh M. Greene, Melissa A Haltuch, Elliott L. Hazen, Damon M Holzer, David D. Huff, Rachel C. Johnson, Chris E Jordan, Issac C Kaplan, Steven T Lindley, Nathan J Mantua, Peter B. Moyle, James M Myers, Mark W Nelson, Brian C Spence, Laurie A. Weitkamp, Thomas H. Williams, Ellen Willis-Norton
Application of multiple-population viability analysis to evaluate species recovery alternatives 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), however, addresses many limitations of...
Authors
Helen M. Neville, Douglas R. Leasure, Daniel C. Dauwalter, Jason B. Dunham, Robin Bjork, Kurt A. Fesenmyer, Nathan Chelgren, Mary M. Peacock, Charles H. Luce, Daniel J. Isaak, Lee Ann Carranza, Jon Sjoberg, Seth J. Wenger
Freezing resistance, safety margins, and survival vary among big sagebrush populations across the western United States Freezing resistance, safety margins, and survival vary among big sagebrush populations across the western United States
Premise Physiological 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 species. Moreover, adaptive significance of...
Authors
Brynne Lazarus, Matthew J. Germino, Bryce A. Richardson
Timber harvest alters mercury bioaccumulation and food web structure in headwater streams 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, biomagnification, and food web structure in...
Authors
James Willacker, Collin A. Eagles-Smith, Brandon M Kowalski, Robert J Danehy, Allyson K. Jackson, Evan M. Adams, David C. Evers, Chris S. Eckley, Michael T. Tate, David P. Krabbenhoft
Lidar-based approaches for estimating solar insolation in heavily forested streams 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 Oregon, USA. We show that a raster...
Authors
Jeffrey J Richardson, Christian E. Torgersen, L Monika Moskal
Corrigendum to “Intercomparison of surface energy fluxes, soil moisture, and evapotranspiration from eddy covariance, large-aperture scintillometer, and modeling across three ecosystems in a semiarid climate” [Agric. For. Meteorol. 248 (2018) 22–47] Corrigendum to “Intercomparison of surface energy fluxes, soil moisture, and evapotranspiration from eddy covariance, large-aperture scintillometer, and modeling across three ecosystems in a semiarid climate” [Agric. For. Meteorol. 248 (2018) 22–47]
No abstract available.
Authors
Prasanth Valayamkunnath, Venkataramana Sridhar, Wenguang Zhao, Richard G Allen, Matthew J. Germino
Effects of experimental removal of Barred Owls on population Demography of Northern Spotted Owls in Washington and Oregon—2018 Progress Report 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 coupled with conservation of suitable...
Authors
J. David Wiens, Katie M. Dugger, Damon B. Lesmeister, Krista E. Dilione, David C. Simon
Rapid broad-scale ecosystem changes and their consequences for biodiversity 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). In many systems, foundational...
Authors
David D. Breshears, Jason P. Field, Darin J. Law, Juan C. Villegas, Craig D. Allen, Neil S. Cobb, John B. Bradford
Roost- and perch-site selection by Golden Eagles (Aquila chrysaetos) in eastern North America Roost- and perch-site selection by Golden Eagles (Aquila chrysaetos) in eastern North America
Birds select critical resources to meet needs that vary in response to spatial, temporal, and individual variation. As an example, perch or roost sites may be at locations that provide protection from predators, mobbing, or inclement weather. Applied to large, soaring predators, this theory suggests that they may select perch and roost sites near food resources or at sites where...
Authors
Adam E. Duerr, Melissa A. Braham, Tricia A. Miller, Jeffrey Cooper, James T. Anderson, Todd E. Katzner
Hydroseeding tackifiers and dryland moss restoration potential Hydroseeding tackifiers and dryland moss restoration potential
Tackifiers are long‐chain carbon compounds used for soil stabilization and hydroseeding and could provide a vehicle for biological soil crust restoration. We examined the sensitivity of two dryland mosses, Bryum argenteum and Syntrichia ruralis, to three common tackifiers ‐ guar, psyllium, and polyacrylamide (PAM) ‐ at 0.5x, 1.0x, and 2.0x of recommended (x) concentrations for erosion...
Authors
W. Dillon Blankenship, Lea A. Condon, David A. Pyke