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By Forest and Rangeland Ecosystem Science Center November 13, 2017

The Pacific Northwest includes a patchwork of public lands managed by numerous state and federal agencies. Our research informs and supports these agencies as they conserve and manage native amphibian species, including pre- and post-treatment assessment, decision support, long-term monitoring, population translocation, and habitat restoration.

 

Many of the systems we work in have altered hydrological regimes, so a focus of our research is understanding native species relationships with timing and amount of water. Examples are studies of amphibian distribution and abundance relative to different water management scenarios and relationships with active beaver dams.

 

Media
Image: Measuring a Frog in the Cascades
Sources/Usage: Public Domain. View Media Details
USGS researchers Brome McCreary (orange vest) and Chris Pearl take measurements on Cascades frog at a mountain lake in Oregon.

Below are other science projects associated with this project.

If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.

No Result Found

If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.

Filter Total Items: 55

Habitat and co-occurrence of native and invasive crayfish in the Pacific Northwest, USA Habitat and co-occurrence of native and invasive crayfish in the Pacific Northwest, USA

Biological invasions can have dramatic effects on freshwater ecosystems and introduced crayfish can be particularly impacting. We document crayfish distribution in three large hydrographic basins (Rogue, Umpqua, Willamette/Columbia) in the Pacific Northwest USA. We used occupancy analyses to investigate habitat relationships and evidence for displacement of native Pacifastacus...
Authors
Christopher A. Pearl, M. J. Adams, Brome McCreary
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Trends in amphibian occupancy in the United States Trends in amphibian occupancy in the United States

Though a third of amphibian species worldwide are thought to be imperiled, existing assessments simply categorize extinction risk, providing little information on the rate of population losses. We conducted the first analysis of the rate of change in the probability that amphibians occupy ponds and other comparable habitat features across the United States. We found that overall...
Authors
M. J. Adams, David A.W. Miller, Erin Muths, Paul Stephen Corn, Evan H. Campbell Grant, Larissa L. Bailey, Gary M. Fellers, Robert N. Fisher, Walter J. Sadinski, Hardin Waddle, Susan C. Walls
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center, Wetland and Aquatic Research Center

Population estimates for the Toiyabe population of the Columbia spotted frog (Rana luteiventris), 2004–10 Population estimates for the Toiyabe population of the Columbia spotted frog (Rana luteiventris), 2004–10

The Toiyabe population of Columbia spotted frogs (Rana luteiventris, hereafter "Toiyabe frogs") is a geographically isolated population located in central Nevada (fig. 1). The Toiyabe population is part of the Great Basin Distinct Population Segment of Columbia spotted frogs, and is a candidate for listing under the Endangered Species Act (U.S. Fish and Wildlife Service, 2011). The...
Authors
M. J. Adams, Chad Mellison, Stephanie K. Galvan
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Short-term response of Dicamptodon tenebrosus larvae to timber management in southwestern Oregon Short-term response of Dicamptodon tenebrosus larvae to timber management in southwestern Oregon

In the Pacific Northwest, previous studies have found a negative effect of timber management on the abundance of stream amphibians, but results have been variable and region specific. These studies have generally used survey methods that did not account for differences in capture probability and focused on stands that were harvested under older management practices. We examined the...
Authors
Niels Leuthold, M. J. Adams, John P. Hayes
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Using multilevel spatial models to understand salamander site occupancy patterns after wildfire 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...
Authors
Nathan Chelgren, M. J. Adams, Larissa L. Bailey, R. Bruce Bury
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Using spatiotemporal models and distance sampling to map the space use and abundance of newly metamorphosed Western Toads (Anaxyrus boreas) 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
Authors
Nathan D. Chelgren, Barbara Samora, M. J. Adams, Brome McCreary
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

The Pacific Northwest includes a patchwork of public lands managed by numerous state and federal agencies. Our research informs and supports these agencies as they conserve and manage native amphibian species, including pre- and post-treatment assessment, decision support, long-term monitoring, population translocation, and habitat restoration.

 

Many of the systems we work in have altered hydrological regimes, so a focus of our research is understanding native species relationships with timing and amount of water. Examples are studies of amphibian distribution and abundance relative to different water management scenarios and relationships with active beaver dams.

 

Media
Image: Measuring a Frog in the Cascades
Sources/Usage: Public Domain. View Media Details
USGS researchers Brome McCreary (orange vest) and Chris Pearl take measurements on Cascades frog at a mountain lake in Oregon.

Below are other science projects associated with this project.

If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.

No Result Found

If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.

Filter Total Items: 55

Habitat and co-occurrence of native and invasive crayfish in the Pacific Northwest, USA Habitat and co-occurrence of native and invasive crayfish in the Pacific Northwest, USA

Biological invasions can have dramatic effects on freshwater ecosystems and introduced crayfish can be particularly impacting. We document crayfish distribution in three large hydrographic basins (Rogue, Umpqua, Willamette/Columbia) in the Pacific Northwest USA. We used occupancy analyses to investigate habitat relationships and evidence for displacement of native Pacifastacus...
Authors
Christopher A. Pearl, M. J. Adams, Brome McCreary
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Trends in amphibian occupancy in the United States Trends in amphibian occupancy in the United States

Though a third of amphibian species worldwide are thought to be imperiled, existing assessments simply categorize extinction risk, providing little information on the rate of population losses. We conducted the first analysis of the rate of change in the probability that amphibians occupy ponds and other comparable habitat features across the United States. We found that overall...
Authors
M. J. Adams, David A.W. Miller, Erin Muths, Paul Stephen Corn, Evan H. Campbell Grant, Larissa L. Bailey, Gary M. Fellers, Robert N. Fisher, Walter J. Sadinski, Hardin Waddle, Susan C. Walls
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center, Wetland and Aquatic Research Center

Population estimates for the Toiyabe population of the Columbia spotted frog (Rana luteiventris), 2004–10 Population estimates for the Toiyabe population of the Columbia spotted frog (Rana luteiventris), 2004–10

The Toiyabe population of Columbia spotted frogs (Rana luteiventris, hereafter "Toiyabe frogs") is a geographically isolated population located in central Nevada (fig. 1). The Toiyabe population is part of the Great Basin Distinct Population Segment of Columbia spotted frogs, and is a candidate for listing under the Endangered Species Act (U.S. Fish and Wildlife Service, 2011). The...
Authors
M. J. Adams, Chad Mellison, Stephanie K. Galvan
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Short-term response of Dicamptodon tenebrosus larvae to timber management in southwestern Oregon Short-term response of Dicamptodon tenebrosus larvae to timber management in southwestern Oregon

In the Pacific Northwest, previous studies have found a negative effect of timber management on the abundance of stream amphibians, but results have been variable and region specific. These studies have generally used survey methods that did not account for differences in capture probability and focused on stands that were harvested under older management practices. We examined the...
Authors
Niels Leuthold, M. J. Adams, John P. Hayes
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Using multilevel spatial models to understand salamander site occupancy patterns after wildfire 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...
Authors
Nathan Chelgren, M. J. Adams, Larissa L. Bailey, R. Bruce Bury
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Using spatiotemporal models and distance sampling to map the space use and abundance of newly metamorphosed Western Toads (Anaxyrus boreas) 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
Authors
Nathan D. Chelgren, Barbara Samora, M. J. Adams, Brome McCreary
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center
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