Michael J Adams
I lead the USGS Amphibian Research and Monitoring Initiative (ARMI) and the Herpetological Research Team at the Forest and Rangeland Science Center in Corvallis, Oregon
Research in my lab focuses on amphibian conservation issues. We are currently addressing issues such as invasive species, disease, land use change, and long-term monitoring design for amphibians in North America. We use a combination of comparative surveys and manipulative experiments to understand the factors affecting amphibian distribution and abundance.
Professional Experience
1997 - Present: USGS, Forest and Rangeland Ecosystem Science Center, Supervisory Research Ecologist, Corvallis, OR
Education and Certifications
Ph.D., Wildlife Science, University of Washington, Seattle, WA (1997)
B.S., Wildlife Biology, Colorado State University, Fort Collins, CO (1992)
Science and Products
Herpetological Research Team (FRESC)
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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.
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.
Population estimates for the Toiyabe population of the Columbia spotted frog (Rana luteiventris), 2004–10
The state of amphibians in the United States
The U.S. Geological Survey Amphibian Research and Monitoring Initiative-2011 Annual Update
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
Invasive crayfish in the Pacific Northwest
Non-native species impacts on pond occupancy by an anuran
Using spatiotemporal models and distance sampling to map the space use and abundance of newly metamorphosed Western Toads (Anaxyrus boreas)
Using multilevel spatial models to understand salamander site occupancy patterns after wildfire
Non-native species impacts on pond occupancy by an anuran
Columbia spotted frog (Rana luteiventris) in southeastern Oregon: A survey of historical localities, 2009
Low prevalence of chytrid fungus (Batrachochytrium dendrobatidis) in amphibians of U.S. headwater streams
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
To request an interview, contact fresc_outreach@usgs.gov or call (541) 750-1030.
Science and Products
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Herpetological Research Team (FRESC)
The Herpetological Research Team focuses on issues related to conservation and management of amphibians and other aquatic and semi-aquatic species. Among our current studies are effects of invasive species, disease, and land use change on the dynamics of amphibian communities to inform conservation and management decision making.Filter Total Items: 13 - Data
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: 23No Result Found - Multimedia
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.
- Publications
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: 107Population 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 cluster of breeAuthorsM. J. Adams, Chad Mellison, Stephanie K. GalvanThe state of amphibians in the United States
More than 25 years ago, scientists began to identify unexplained declines in amphibian populations around the world. Much has been learned since then, but amphibian declines have not abated and the interactions among the various threats to amphibians are not clear. Amphibian decline is a problem of local, national, and international scope that can affect ecosystem function, biodiversity, and commeAuthorsE. Muths, M.J. Adams, E.H.C. Grant, D. Miller, P. S. Corn, L.C. BallThe 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 those publicatAuthorsM.J. Adams, E. Muths, E.H.C. Grant, David A. Miller, J.H. Waddle, L.C. BallShort-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 influences of cAuthorsNiels Leuthold, M. J. Adams, John P. HayesShort-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 influences of cAuthorsN. Leuthold, M.J. Adams, J. P. HayesInvasive crayfish in the Pacific Northwest
Invasive species directly threaten freshwater biodiversity, particularly in regions of high aquatic richness like the Pacific Northwest (PNW). Crayfish are among the most impactful of aquatic invasive species. Invasive crayfish are considered ecosystem engineers due to their ability to alter basic wetland properties, such as reducing vegetation and bank integrity and increasing turbidity. In areasAuthorsChristopher A. Pearl, Brome McCreary, Michael AdamsNon-native species impacts on pond occupancy by an anuran
Non‐native fish and bullfrogs (Lithobates catesbeianus) are frequently cited as contributing to the decline of ranid frogs in the western United States, so we hypothesized that non‐native species, habitat, or a combination of these relate to the probability of local extinction for northern red‐legged frogs (Rana aurora) in Oregon, USA. We also hypothesized that the probability of colonization relaAuthorsM. J. Adams, Christopher A. Pearl, Stephanie Galvan, Brome McCrearyUsing 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 WashingtoAuthorsNathan D. Chelgren, Barbara Samora, M. J. Adams, Brome McCrearyUsing 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 vaAuthorsNathan Chelgren, M. J. Adams, Larissa L. Bailey, R. Bruce BuryNon-native species impacts on pond occupancy by an anuran
Non-native fish and bullfrogs (Lithobates catesbeianus) are frequently cited as contributing to the decline of ranid frogs in the western United States, so we hypothesized that non-native species, habitat, or a combination of these relate to the probability of local extinction for northern red-legged frogs (Rana aurora) in Oregon, USA. We also hypothesized that the probability of colonization relaAuthorsMichael J. Adams, Christopher Pearl, Stephanie Galvan, Brome McCrearyColumbia spotted frog (Rana luteiventris) in southeastern Oregon: A survey of historical localities, 2009
The Columbia spotted frog (Rana luteiventris) occupies a large range in western North America and is comprised of at least three genetic units. Concern exists regarding the status of the Great Basin populations in Oregon, Idaho, and Nevada. We surveyed target and nearby alternate sites on public lands in southeastern Oregon where there was evidence that Columbia spotted frogs were historically preAuthorsChistopher A. Pearl, Stephanie K. Galvan, M. J. Adams, Brome McCrearyLow prevalence of chytrid fungus (Batrachochytrium dendrobatidis) in amphibians of U.S. headwater streams
Many declines of amphibian populations have been associated with chytridiomycosis, a disease caused by the aquatic fungus Batrachochytrium dendrobatidis (Bd). Despite the relatively high prevalence of chytridiomycosis in stream amphibians globally, most surveys in North America have focused primarily on wetland-associated species, which are frequently infected. To better understand the distributioAuthorsBlake R. Hossack, M. J. Adams, Evan H. Campbell Grant, Chistopher A. Pearl, James B. Bettaso, William J. Barichivich, Winsor H. Lowe, Kimberly True, Joy L. Ware, Paul Stephen CornNon-USGS Publications**
Adams, M.J., 1993, Summer nests of the tailed frog (Ascaphus truei) from the Oregon Coast Range: Northwestern Naturalist, v. 74, no. 1, p. 15-18.**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
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