Forest and Rangeland Ecosystem Science Center (FRESC)
Publications
Ecosystems science: Genes to landscapes
Decadal-scale decoupling of soil phosphorus and molybdenum cycles by temperate nitrogen-fixing trees
Symbiotic nitrogen- (N) fixing trees can influence multiple biogeochemical cycles by fixing atmospheric N, which drives net primary productivity and soil carbon (C) and N accumulation, as well as by mobilizing soil phosphorus (P) and other nutrients to support growth and metabolism. The soil micronutrient molybdenum (Mo) is essential to N-fixation...
Dynarski, Katherine A; Pett-Ridge, Julie C.; Perakis, Steven Projecting spatiotemporally explicit effects of climate change on stream temperature: A model comparison and implications for coldwater fishes
Conservation planners and resource managers seek information about how the availability and locations of cold-water habitats will change in the future and how these predictions vary among models. We used a physical process-based model to demonstrate the implications of climate change for streamflow and water temperature in two watersheds with...
Lee, Se Yeun; Fullerton, Aimee H.; Sun, Ning; Torgersen, Christian E. Longitudinal, lateral, vertical, and temporal thermal heterogeneity in a large impounded river: Implications for cold-water refuges
Dam operations can affect mixing of the water column, thereby influencing thermal heterogeneity spatially and temporally. This occurs by restricting or eliminating connectivity in longitudinal, lateral, vertical, and temporal dimensions. We examined thermal heterogeneity across space and time and identified potential cold-water refuges for...
Mejia, Francine H.; Torgersen, Christian E.; Berntsen, Eric K; Maroney, Joseph R; Connor, J M; Fullerton, Aimee H.; Ebersole, Joseph L.; Lorang, Mark L
Some approaches to accounting for incidental carcass discoveries in non-monitored years using the Evidence of Absence model
Executive SummaryWe evaluate three approaches to accounting for incidental carcasses when estimating an upper bound on total mortality (𝑀) as 𝑀∗ using the Evidence of Absence model (EoA; Dalthorp and others, 2017) to assess compliance with an Incidental Take Permit (ITP) (Dalthorp & Huso, 2015) under a monitoring protocol that includes formal...
Dalthorp, Daniel; Rabie, Paul; Huso, Manuela; Tredennick, Andrew Thermal heterogeneity, migration, and consequences for spawning potential of female bull trout in a river-reservoir system
The likelihood that fish will initiate spawning, spawn successfully, or skip spawning in a given year is conditioned in part on availability of energy reserves. We evaluated the consequences of spatial heterogeneity in thermal conditions on the energy accumulation and spawning potential of migratory bull trout (Salvelinus confluentus) in a...
Benjamin, Joseph R.; Vidergar, Dmitri T; Dunham, Jason B. Understanding the golden eagle and bald eagle sensory worlds to enhance detection and response to wind turbines
The objective for this study was to measure the auditory and visual physiology of Golden and Bald Eagles in order to use eagle sensory capabilities to inform the design of potential deterrent stimuli that could be used to reduce eagle/turbine collisions with wind turbines. The rationale for this approach is that sensory systems of any organism...
Fernández-Juricic, Esteban; Lucas, Jeffrey; Katzner, Todd E.; Goller, B.; Baumhardt, P.; Lovko, N. Learning from real-world experience to understand renewable energy impacts to wildlife
The project team sought to use real-world data to understand adverse effects to wildlife of renewable energy production that is critical to meeting California’s climate and clean energy goals. The project had three main components. First, a systematic literature review studied 20 peer-reviewed publications and 612 reports from other nonreviewed...
Conkling, Tara J; Vander Zanden, Hannah B.; Poessel, Sharon; Loss, Scott R.; Allison, Taber D; Diffendorfer, James E.; Duerr, Adam E.; Nelson, David M.; Yee, Julie L; Katzner, Todd E. Assessing population-level consequences of anthropogenic stressors for terrestrial wildlife
Human activity influences wildlife. However, the ecological and conservation significances of these influences are difficult to predict and depend on their population‐level consequences. This difficulty arises partly because of information gaps, and partly because the data on stressors are usually collected in a count‐based manner (e.g., number of...
Katzner, Todd E.; Braham, Melissa A.; Conkling, Tara; Diffendorfer, James E.; Duerr, Adam E.; Loss, Scott R.; Nelson, David M.; Vander Zanden, Hannah B.; Yee, Julie L. Long term persistence of aspen in snowdrift-dependent ecosystems
Quaking aspen (Populus tremuloides) forests throughout the western United States have experienced significant mortality in recent decades, much of which has been influenced by climate variability, especially drought. In the western portion of its range, where most precipitation arrives during winter as snowfall and summers are dry, snowdrifts that...
Kretchun, Alec M; Scheller, Robert M; Shinneman, Douglas; Soderquist, B; Maguire, Kaitlin C.; Link, Timothy E; Strand, Eva K. Movements and habitat use of loons for assessment of conservation buffer zones in the Arctic Coastal Plain of northern Alaska
Oil and gas development in the Arctic Coastal Plain, Alaska, may pose threats to wildlife. Management guidelines within the National Petroleum Reserve-Alaska dictate buffer zones for coastal wildlife habitat and for breeding and foraging sites of yellow-billed loons (YBLOs; Gavia adamsii), a species of conservation concern. However, few data...
Poessel, Sharon; Uher-Koch, Brian D.; Pearce, John M.; Schmutz, Joel A.; Katzner, Todd E.; Douglas, David C.; von Biela, Vanessa R.; Harrison, Autumn-Lynne Occupancy patterns in a reintroduced fisher population during reestablishment
Monitoring population performance in the years following species reintroductions is key to assessing population restoration success and evaluating assumptions made in planning species restoration programs. From 2008–2010 we translocated 90 fishers (Pekania pennanti) from British Columbia, Canada, to Washington's Olympic Peninsula, USA, providing...
Happe, Patricia J.; Jenkins, Kurt; Mccaffery, Rebecca; Lewis, J. C.; Pilgrim, Kristine; Schwartz, Michael K. Removal of cattle grazing correlates with increases in vegetation productivity and in abundance of imperiled breeding birds
Livestock grazing is the most prevalent land use practice in the western United States and a widespread cause of degradation of riparian vegetation. Riparian areas provide high-quality habitat for many species of declining migratory breeding birds. We analyzed changes in vegetation and bird abundance at a wildlife refuge in southeastern Oregon...
Poessel, Sharon; Hagar, Joan; Haggerty, Patricia; Katzner, Todd E.