Publications
Filter Total Items: 1990
Biology, status, and management of the yellowstone cutthroat trout
Yellowstone cutthroat trout Oncorhynchus clarkii bouvieri were historically distributed in the Yellowstone River drainage (Montana and Wyoming) and the Snake River drainage (Wyoming, Idaho, Utah, Nevada, and probably Washington). Individual populations evolved distinct life history characteristics in response to the diverse environments in which they were isolated after the last glaciation. Anthro
Authors
Robert E. Gresswell
Amphibian responses to wildfire in the western united states: Emerging patterns from short-term studies
The increased frequency and severity of large wildfires in the western United States is an important ecological and management issue with direct relevance to amphibian conservation. Although the knowledge of fire effects on amphibians in the region is still limited relative to most other vertebrate species, we reviewed the current literature to determine if there are evident patterns that might be
Authors
B. R. Hossack, D. S. Pilliod
Using spatiotemporal models and distance sampling to map the space use and abundance of newly metamorphosed Western Toads (Anaxyrus boreas)
High variability in abundance, cryptic coloration, and small body size of newly metamorphosed anurans have limited demographic studies of this life-history stage. We used line-transect distance sampling and Bayesian methods to estimate the abundance and spatial distribution of newly metamorphosed Western Toads (Anaxyrus boreas) in terrestrial habitat surrounding a montane lake in central Washingto
Authors
Nathan D. Chelgren, Barbara Samora, M. J. Adams, Brome McCreary
Using multilevel spatial models to understand salamander site occupancy patterns after wildfire
Studies of the distribution of elusive forest wildlife have suffered from the confounding of true presence with the uncertainty of detection. Occupancy modeling, which incorporates probabilities of species detection conditional on presence, is an emerging approach for reducing observation bias. However, the current likelihood modeling framework is restrictive for handling unexplained sources of va
Authors
Nathan Chelgren, M. J. Adams, Larissa L. Bailey, R. Bruce Bury
Molecular detection of vertebrates in stream water: A demonstration using rocky mountain tailed frogs and Idaho giant salamanders
Stream ecosystems harbor many secretive and imperiled species, and studies of vertebrates in these systems face the challenges of relatively low detection rates and high costs. Environmental DNA (eDNA) has recently been confirmed as a sensitive and efficient tool for documenting aquatic vertebrates in wetlands and in a large river and canal system. However, it was unclear whether this tool could b
Authors
C.S. Goldberg, D. S. Pilliod, R.S. Arkle, L.P. Waits
Biogeochemistry of a temperate forest nitrogen gradient
Wide natural gradients of soil nitrogen (N) can be used to examine fundamental relationships between plant–soil–microbial N cycling and hydrologic N loss, and to test N-saturation theory as a general framework for understanding ecosystem N dynamics. We characterized plant production, N uptake and return in litterfall, soil gross and net N mineralization rates, and hydrologic N losses of nine Dougl
Authors
Steven S. Perakis, Emily R. Sinkhorn
Chapter 8: Occurrence of large and medium-sized mammals: Occurrence but not count models predict pronghorn distribution
Management of medium to large-sized terrestrial mammals (Antilocapridae, Canidae, Cervidae, Leporidae, Mustelidae, Ochotonidae) in the western United States is multifaceted and complex. Species in this group generally are charismatic and provide economic opportunities, although others are considered a nuisance at one extreme or are listed as species of conservation concern at the other. Understand
Authors
Matthias Leu, Steve E. Hanser, Cameron L. Aldridge, Scott E. Nielsen, Lowell H. Suring, Steven T. Knick
Chapter 7: Occurrence and abundance of ants, reptiles, and mammals
Sagebrush (Artemisia spp.)- associated wildlife are threatened by habitat loss and fragmentation and by impacts associated with anthropogenic disturbances, including energy development. Understanding how species of concern as well as other wildlife including insects, reptiles, and mammals respond to type and spatial scale of disturbance is critical to managing future land uses and identifying site
Authors
Steve E. Hanser, Matthias Leu, Cameron L. Aldridge, Scott E. Nielsen, Mary M. Rowland, Steven T. Knick
Chapter 5: Greater sage-grouse: General use and roost site occurrence with pellet counts as a measure of relative abundance
Greater sage-grouse (Centrocercus urophasianus) have been declining both spatially and numerically throughout their range because of anthropogenic disturbance and loss and fragmentation of sagebrush (Artemisia spp.) habitats. Understanding how sage-grouse respond to these habitat alterations and disturbances, particularly the types of disturbances and extent at which they respond, is critical to d
Authors
Steve E. Hanser, Cameron L. Aldridge, Matthias Leu, Mary M. Rowland, Scott E. Nielsen, Steven T. Knick
Chapter 6: Detectability adjusted count models of songbird abundance
Sagebrush (Artemisia spp.) steppe ecosystems have experienced recent changes resulting not only in the loss of habitat but also fragmentation and degradation of remaining habitats. As a result, sagebrush-obligate and sagebrush associated songbird populations have experienced population declines over the past several decades. We examined landscape-scale responses in occupancy and abundance for six
Authors
Cameron L. Aldridge, Steve E. Hanser, Scott E. Nielsen, Matthias Leu, Brian S. Cade, D. Joanne Saher, Steven T. Knick
Chapter 4: A sampling and analytical approach to develop spatial distribution models for sagebrush-associated species
Understanding multi-scale floral and faunal responses to human land use is crucial for informing natural resource management and conservation planning. However, our knowledge on how land use influences sagebrush (Artemisia spp.) ecosystems is limited primarily to site-specific studies. To fill this void, studies across large regions are needed that address how species are distributed relative to t
Authors
Matthias Leu, Steven E. Hanser, Cameron L. Aldridge, Scott E. Nielsen, Brian S. Cade, Steven T. Knick