Publications
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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
The paradox of cooling streams in a warming world: Regional climate trends do not parallel variable local trends in stream temperature in the Pacific continental United States The paradox of cooling streams in a warming world: Regional climate trends do not parallel variable local trends in stream temperature in the Pacific continental United States
Temperature is a fundamentally important driver of ecosystem processes in streams. Recent warming of terrestrial climates around the globe has motivated concern about consequent increases in stream temperature. More specifically, observed trends of increasing air temperature and declining stream flow are widely believed to result in corresponding increases in stream temperature. Here, we...
Authors
Ivan Arismendi, Sherri Johnson, Jason B. Dunham, Roy Haggerty, David Hockman-Wert
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
The U.S. Geological Survey Amphibian Research and Monitoring Initiative-2011 Annual Update The U.S. Geological Survey Amphibian Research and Monitoring Initiative-2011 Annual Update
Welcome to the inaugural issue of ARMI's Annual Update. This update provides highlights and significant milestones of this innovative program. ARMI is uniquely qualified to provide research and monitoring results that are scalable from local to national levels, and are useful to resource managers. ARMI has produced nearly 400 peer-reviewed publications, including 18 in 2011. Some of...
Authors
M.J. Adams, E. Muths, E.H.C. Grant, David A. Miller, J.H. Waddle, L.C. Ball
Spatiotemporal patterns and habitat associations of smallmouth bass (Micropterus dolomieu) invading salmon-rearing habitat Spatiotemporal patterns and habitat associations of smallmouth bass (Micropterus dolomieu) invading salmon-rearing habitat
1. Smallmouth bass (Micropterus dolomieu) have been widely introduced to fresh waters throughout the world to promote recreational fishing opportunities. In the Pacific Northwest (U.S.A.), upstream range expansions of predatory bass, especially into subyearling salmon-rearing grounds, are of increasing conservation concern, yet have received little scientific inquiry. Understanding the...
Authors
David J. Lawrence, Julian D. Olden, Christian E. Torgersen
A holistic strategy for adaptive land management A holistic strategy for adaptive land management
Adaptive management is widely applied to natural resources management (Holling 1973; Walters and Holling 1990). Adaptive management can be generally defined as an iterative decision-making process that incorporates formulation of management objectives, actions designed to address these objectives, monitoring of results, and repeated adaptation of management until desired results are...
Authors
Jeffrey E. Herrick, Michael C. Duniway, David A. Pyke, Brandon T. Bestelmeyer, Skye A. Wills, Joel R. Brown, Jason W. Karl, Kris M. Havstad