Publications
Filter Total Items: 2073
Arthropod prey for riparian associated birds in headwater forests of the Oregon Coast Range Arthropod prey for riparian associated birds in headwater forests of the Oregon Coast Range
Headwater riparian areas occupy a large proportion of the land base in Pacific Northwest forests, and thus are ecologically and economically important. Although a primary goal of management along small headwater streams is the protection of aquatic resources, streamside habitat also is important for many terrestrial wildlife species. However, mechanisms underlying the riparian...
Authors
Joan C. Hagar, Judith Li, Janel Sobota, Stephanie Jenkins
A history of herpetologists and herpetology in the U.S. Department of the Interior A history of herpetologists and herpetology in the U.S. Department of the Interior
The U.S. Department of the Interior (DOI) has a long and distinguished history of employing herpetologists to conduct basic and applied research to better manage amphibian and reptile populations on public lands and even outside the boundaries of the United States. This history extends back over 125 years with roots in the U.S. Biological Survey, the Fish and Wildlife Service, the Bureau...
Authors
Jeffrey E. Lovich, Norman J. Scott, R. Bruce Bury, C. Kenneth Dodd, Roy W. McDiarmid
Projected climate-induced habitat loss for salmonids in the John Day River network, Oregon, U.S.A. Projected climate-induced habitat loss for salmonids in the John Day River network, Oregon, U.S.A.
Climate change will likely have profound effects on cold-water species of freshwater fishes. As temperatures rise, cold-water fish distributions may shift and contract in response. Predicting the effects of projected stream warming in stream networks is complicated by the generally poor correlation between water temperature and air temperature. Spatial dependencies in stream networks are...
Authors
Aaron S. Ruesch, Christian E. Torgersen, Joshua J. Lawler, Julian D. Olden, Erin E. Peterson, Carol J. Volk, David J. Lawrence
Ecological context for the North Pacific Landscape Conservation Cooperative Ecological context for the North Pacific Landscape Conservation Cooperative
The North Pacific Landscape Conservation Cooperative (NPLCC) encompasses the temperate coastal rainforest and extends from the coastal mountains to the near-shore from the Kenai Peninsula, Alaska to Bodega Bay, California. The area spans multiple agency, state, and international boundaries over more than 22 degrees of latitude, including a wide range of type and intensity of human land...
Authors
Andrea Woodward, Audrey Taylor, Anne Weekes
Persistence and extirpation in invaded landscapes: patch characteristics and connectivity determine effects of non-native predatory fish on native salamanders Persistence and extirpation in invaded landscapes: patch characteristics and connectivity determine effects of non-native predatory fish on native salamanders
Studies have demonstrated negative effects of non-native, predatory fishes on native amphibians, yet it is still unclear why some amphibian populations persist, while others are extirpated, following fish invasion. We examined this question by developing habitat-based occupancy models for the long-toed salamander (Ambystoma macrodactylum) and nonnative fish using survey data from 1,749...
Authors
David S. Pilliod, Robert S. Arkle, Bryce A. Maxell
Frequency of nest use by golden eagles in southwestern Idaho Frequency of nest use by golden eagles in southwestern Idaho
We studied nest use by Golden Eagles (Aquila chrysaetos) from 1966 to 2011 to assess nest reuse within territories, ascertain the length of time that elapses between uses of nests, and test the hypotheses that reproductive success and adult turnover influence nest switching. Golden Eagles used 454 nests in 66 territories and used individual nests 1 to 26 times during 45 continuous years...
Authors
Michael N. Kochert, Karen Steenhof
Developing a broader scientific foundation for river restoration: Columbia River food webs Developing a broader scientific foundation for river restoration: Columbia River food webs
Well-functioning food webs are fundamental for sustaining rivers as ecosystems and maintaining associated aquatic and terrestrial communities. The current emphasis on restoring habitat structure—without explicitly considering food webs—has been less successful than hoped in terms of enhancing the status of targeted species and often overlooks important constraints on ecologically...
Authors
Robert J. Naiman, Richard Alldredge, David A. Beauchamp, Peter A. Bisson, James Congleton, Charles J. Henny, Nancy Huntly, Roland Lamberson, Colin Levings, Erik N. Merrill, William G. Pearcy, Bruce E. Rieman, Gregory T. Ruggerone, Dennis Scarnecchia, Peter E. Smouse, Chris C. Wood
Changes in avian and plant communities of aspen woodlands over 12 years after livestock removal in the northwestern Great Basin Changes in avian and plant communities of aspen woodlands over 12 years after livestock removal in the northwestern Great Basin
Riparian and quaking aspen (Populus tremuloides) woodlands are centers of avian abundance and diversity in the western United States, but they have been affected adversely by land use practices, particularly livestock grazing. In 1990, cattle were removed from a 112,500-ha national wildlife refuge in southeastern Oregon. Thereafter, we monitored changes in vegetation and bird abundance...
Authors
Susan L. Earnst, David S. Dobkin, Jennifer A. Ballard
Sinks for nitrogen inputs in terrestrial ecosystems: a meta-analysis of 15N tracer field studies Sinks for nitrogen inputs in terrestrial ecosystems: a meta-analysis of 15N tracer field studies
Effects of anthropogenic nitrogen (N) deposition and the ability of terrestrial ecosystems to store carbon (C) depend in part on the amount of N retained in the system and its partitioning among plant and soil pools. We conducted a meta-analysis of studies at 48 sites across four continents that used enriched 15N isotope tracers in order to synthesize information about total ecosystem N...
Authors
P.H. Templer, M.C. Mack, F. S. Chapin, L.M. Christenson, J.E. Compton, H.D. Crook, W.S. Currie, C.J. Curtis, D.B. Dail, C. M. D’Antonio, B.A. Emmett, H.E. Epstein, C.L. Goodale, P. Gundersen, S.E. Hobbie, K. Holland, D.U. Hooper, B.A. Hungate, S. Lamontagne, K.J. Nadelhoffer, C.W. Osenberg, S.S. Perakis, P. Schleppi, J. Schimel, I.K. Schmidt, M. Sommerkorn, J. Spoelstra, A. Tietema, W.W. Wessel, D.R. Zak
Variation in migratory behavior influences regional genetic diversity and structure among American kestrel populations (Falco sparverius) in North America Variation in migratory behavior influences regional genetic diversity and structure among American kestrel populations (Falco sparverius) in North America
Birds employ numerous strategies to cope with seasonal fluctuations in high-quality habitat availability. Long distance migration is a common tactic; however, partial migration is especially common among broadly distributed species. Under partial migration systems, a portion of a species migrates, whereas the remainder inhabits breeding grounds year round. In this study, we identified...
Authors
Mark P. Miller, Thomas D. Mullins, John G. Parrish, Jeffrey R. Walters, Susan M. Haig
Tradeoffs between homing and habitat quality for spawning site selection by hatchery-origin Chinook salmon Tradeoffs between homing and habitat quality for spawning site selection by hatchery-origin Chinook salmon
Spawning site selection by female salmon is based on complex and poorly understood tradeoffs between the homing instinct and the availability of appropriate habitat for successful reproduction. Previous studies have shown that hatchery-origin Chinook salmon (Oncorhynchus tshawytscha) released from different acclimation sites return with varying degrees of fidelity to these areas. To...
Authors
Jeremy M. Cram, Christian E. Torgersen, Ryan S. Klett, George R. Pess, Darran May, Todd N. Pearsons, Andrew H. Dittman
Transport of biologically important nutrients by wind in an eroding cold desert Transport of biologically important nutrients by wind in an eroding cold desert
Wind erosion following fire is an important landscape process that can result in the redistribution of ecologically important soil resources. In this study we evaluated the potential for a fire patch in a desert shrubland to serve as a source of biologically important nutrients to the adjacent, downwind, unburned ecosystem. We analyzed nutrient concentrations (P, K, Ca, Mg, Cu, Fe, Mn...
Authors
Joel B. Sankey, Matthew J. Germino, Shawn G. Benner, Nancy F. Glenn, Amber N. Hoover