Publications
Filter Total Items: 2091
Influences of the human footprint on sagebrush landscape patterns: Implications for sage-grouse conservation Influences of the human footprint on sagebrush landscape patterns: Implications for sage-grouse conservation
Spatial patterns influence the processes that maintain Greater Sage-Grouse (Centrocercus urophasianus) populations and sagebrush (Artemisia spp.) landscapes on which they depend. We used connectivity analyses to: (1) delineate the dominant pattern of sagebrush landscapes; (2) identify regions of the current range-wide distribution of Greater Sage-Grouse important for conservation; (3)...
Authors
Matthias Leu, Steven E. Hanser
Greater sage-grouse and sagebrush - An introduction to the landscape Greater sage-grouse and sagebrush - An introduction to the landscape
No abstract available.
Authors
Steven T. Knick, John W. Connelly
Developing Gyrfalcon surveys and monitoring for Alaska Developing Gyrfalcon surveys and monitoring for Alaska
We developed methods to monitor the status of Gyrfalcons in Alaska. Results of surveys and monitoring will be informative for resource managers and will be useful for studying potential changes in ecological communities of the high latitudes. We estimated that the probability of detecting a Gyrfalcon at an occupied nest site was between 64% and 87% depending on observer experience and...
Authors
Mark R. Fuller, Philip F. Schempf, Travis L. Booms
Mountain goat abundance and population trends in the Olympic Mountains, Washington, 2011 Mountain goat abundance and population trends in the Olympic Mountains, Washington, 2011
We conducted an aerial helicopter survey between July 18 and July 25, 2011, to estimate abundance and trends of introduced mountain goats (Oreamnos americanus) in the Olympic Mountains. The survey was the first since we developed a sightability correction model in 2008, which provided the means to estimate the number of mountain goats present in the surveyed areas and not seen during the...
Authors
Kurt Jenkins, Patricia Happe, Paul C. Griffin, Katherine Beirne, Roger Hoffman, William Baccus
Wastewater dilution index partially explains observed polybrominated diphenyl ether flame retardant concentrations in osprey eggs from Columbia River Basin, 2008-2009 Wastewater dilution index partially explains observed polybrominated diphenyl ether flame retardant concentrations in osprey eggs from Columbia River Basin, 2008-2009
Several polybrominated biphenyl ether (PBDE) congeners were found in all 175 osprey (Pandion haliaetus) eggs collected from the Columbia River Basin between 2002 and 2009. ΣPBDE concentrations in 2008–2009 were highest in osprey eggs from the two lowest flow rivers studied; however, each river flowed through relatively large and populous metropolitan areas (Boise, Idaho and Spokane...
Authors
Charles J. Henny, Robert A. Grove, James L. Kaiser, Branden L. Johnson, Chad V. Furl, Robert J. Letcher
Patterns of hybridization of nonnative cutthroat trout and hatchery rainbow trout with native redband trout in the Boise River, Idaho Patterns of hybridization of nonnative cutthroat trout and hatchery rainbow trout with native redband trout in the Boise River, Idaho
Hybridization is one of the greatest threats to native fishes. Threats from hybridization are particularly important for native trout species as stocking of nonnative trout has been widespread within the ranges of native species, thus increasing the potential for hybridization. While many studies have documented hybridization between native cutthroat trout Oncorhynchus clarkii and...
Authors
Helen M. Neville, Jason B. Dunham
Using digital photography to examine grazing in montane meadows Using digital photography to examine grazing in montane meadows
Cattle (Bos taurus) numbers on national forests are allocated based on allotment grazing capacity, but spatial patterns of timing and density at smaller scales are difficult to assess. However, it is often in meadows or riparian areas that grazing may affect hydrology, biodiversity, and other important ecosystem characteristics. To explore real-time animal presence in montane meadows we
Authors
Susan K. McIlroy, Barbara H. Allen-Diaz, Alexander C. Berg
Use of non-alpine anthropogenic habitats by American pikas (Ochotona princeps) in western Oregon, USA Use of non-alpine anthropogenic habitats by American pikas (Ochotona princeps) in western Oregon, USA
The American pika (Ochotona princeps Richardson) has long been characterized in field guides and popular literature as an obligate inhabitant of alpine talus and as having relatively low dispersal capability. However, recent work reveals pikas to have broader habitat associations than previously reported. Over a large portion of the western slope of the Cascade Range in Oregon, pikas...
Authors
Tom Manning, Joan C. Hagar
Tree species and soil nutrient profiles in old-growth forests of the Oregon Coast Range Tree species and soil nutrient profiles in old-growth forests of the Oregon Coast Range
Old-growth forests of the Pacific Northwest provide a unique opportunity to examine tree species – soil relationships in ecosystems that have developed without significant human disturbance. We characterized foliage, forest floor, and mineral soil nutrients associated with four canopy tree species (Douglas-fir (Pseudotsuga menziesii (Mirbel) Franco), western hemlock (Tsuga heterophylla...
Authors
Alison Cross, Steven S. Perakis
Decomposition of heterogeneous organic matterand its long-term stabilization in soils Decomposition of heterogeneous organic matterand its long-term stabilization in soils
Soil organic matter is a complex mixture of material with heterogeneous biological, physical, and chemical properties. Decomposition models represent this heterogeneity either as a set of discrete pools with different residence times or as a continuum of qualities. It is unclear though, whether these two different approaches yield comparable predictions of organic matter dynamics. Here...
Authors
Carlos A. Sierra, Mark E. Harmon, Steven S. Perakis
Flow regime, temperature, and biotic interactions drive differential declines of trout species under climate change Flow regime, temperature, and biotic interactions drive differential declines of trout species under climate change
Broad-scale studies of climate change effects on freshwater species have focused mainly on temperature, ignoring critical drivers such as flow regime and biotic interactions. We use downscaled outputs from general circulation models coupled with a hydrologic model to forecast the effects of altered flows and increased temperatures on four interacting species of trout across the interior...
Authors
S.J. Wenger, D.J. Isaak, C.H. Luce, H.M. Neville, K.D. Fausch, J. B. Dunham, D.C. Dauwalter, M.K. Young, M.M. Elsner, B.E. Rieman, A.F. Hamlet, J.E. Williams
Temperature-associated population diversity in salmon confers benefits to mobile consumers Temperature-associated population diversity in salmon confers benefits to mobile consumers
Habitat heterogeneity can generate intraspecific diversity through local adaptation of populations. While it is becoming increasingly clear that population diversity can increase stability in species abundance, less is known about how population diversity can benefit consumers that can integrate across population diversity in their prey. Here we demonstrate cascading effects of thermal
Authors
Casey P. Ruff, Daniel E. Schindle, Jonathan B. Armstrong, Kale T. Bentle, Gabriel T. Brooks, Gordon W. Holtgrieve, Molly T. McGlauflin, Christian E. Torgersen, James E. Seeb