Christopher A Pearl
I am a Wildlife Biologist at the USGS Forest and Rangeland Ecosystem Science Center in Corvallis, OR.
I work on research and monitoring studies for a variety of aquatic and terrestrial species in the Pacific Northwest. I am particularly interested in restoration of wetland and riparian systems, herpetology, and interactions between native and invasive species.
Professional Experience
2001-Present: Wildlife Biologist, USGS Forest and Rangeland Ecosystem Science Center, Corvallis, OR
The Nature Conservancy
Faculty Research Associate, Oregon State University, Corvallis, OR
Education and Certifications
M.S., Environmental Studies, University of Oregon (1999)
B.S., Community Forestry and Horticulture, University of Vermont, Burlington, VT (1988)
Science and Products
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: 68
Characteristics of Columbia spotted frog (Rana luteiventris) oviposition sites in northeastern Oregon, USA Characteristics of Columbia spotted frog (Rana luteiventris) oviposition sites in northeastern Oregon, USA
Several western ranid frogs possess a unique strategy of breeding communally over a short temporal window and reusing oviposition sites between years. However, little is published on the characteristics of oviposition sites selected by these explosive breeders. The Columbia spotted frog (Rana luteiventris) is native to northwestern North America and is of conservation concern in the...
Authors
Christopher A. Pearl, M. J. Adams, Wendy Wente
Oregon Spotted Frog (Rana pretiosa) movement and demography at Dilman Meadow: Implications for future monitoring Oregon Spotted Frog (Rana pretiosa) movement and demography at Dilman Meadow: Implications for future monitoring
From 2001 to 2005, we studied the demography and seasonal movement of Oregon spotted frogs (Rana pretiosa) translocated into created ponds in Dilman Meadow in central Oregon. Our objectives were to inform future monitoring and management at the site, and to elucidate poorly known aspects of the species’ population ecology. Movement rates revealed complementary use of sites seasonally...
Authors
Nathan D. Chelgren, Christopher A. Pearl, Jay Bowerman, M. J. Adams
Observations of rapid colonization of constructed ponds by Western toad (Bufo boreas) in Oregon, USA Observations of rapid colonization of constructed ponds by Western toad (Bufo boreas) in Oregon, USA
No abstract available.
Authors
Christopher A. Pearl, Jay Bowerman
Taricha granulosa (Rough-skinned newt). Summer habitat and aggregation. Taricha granulosa (Rough-skinned newt). Summer habitat and aggregation.
Terrestrial behavior and habitat associations of post-metamorphic Taricha granulosa are poorly understood (Oliver and McCurdy 1974. Can. J. Zool. 52:541-545; Pimentel 1960. Amer. Midl. Nat. 63:470-496). Chandler (1918. Oregon Agric. Coll. Exper. Sta. Bull. 152:6) referenced Fall T granulosa aggregations in "cavities under stumps, logs, and stones," but does not present specific data...
Authors
Christopher A. Pearl
Taxonomic and geographic variation in oviposition by tailed frogs (Ascaphus spp) Taxonomic and geographic variation in oviposition by tailed frogs (Ascaphus spp)
Tailed frogs (Ascaphus spp.) oviposit in cryptic locations in streams of the Pacific Northwest and Rocky Mountains. This aspect of their life history has restricted our understanding of their reproductive ecology. The recent split of A. montanus in the Rocky Mountains from A. truei was based on molecular differentiation, and comparisons of their ecology are limited. Our objectives were...
Authors
Nancy E. Karraker, David S. Pilliod, M. J. Adams, Evelyn L. Bull, Paul Stephen Corn, Lowell V. Diller, Marc P. Hayes, Blake R. Hossack, Garth R. Hodgson, Erin J. Hyde, Kirk Lohman, Bradford R. Norman, Lisa M. Ollivier, Christopher A. Pearl, Charles R. Peterson
Amphibian occurrence and aquatic invaders in a changing landscape: Implications for wetland mitigation in the Willamette Valley, Oregon Amphibian occurrence and aquatic invaders in a changing landscape: Implications for wetland mitigation in the Willamette Valley, Oregon
Despite concern about the conservation status of amphibians in western North America, few field studies have documented occurrence patterns of amphibians relative to potential stressors. We surveyed wetland fauna in Oregon's Willamette Valley and used an information theoretic approach (AIC) to rank the associations between native amphibian breeding occurrence and wetland characteristics...
Authors
Christopher A. Pearl, M. J. Adams, N. Leuthold, R. Bruce Bury
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: 19
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Science and Products
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: 68
Characteristics of Columbia spotted frog (Rana luteiventris) oviposition sites in northeastern Oregon, USA Characteristics of Columbia spotted frog (Rana luteiventris) oviposition sites in northeastern Oregon, USA
Several western ranid frogs possess a unique strategy of breeding communally over a short temporal window and reusing oviposition sites between years. However, little is published on the characteristics of oviposition sites selected by these explosive breeders. The Columbia spotted frog (Rana luteiventris) is native to northwestern North America and is of conservation concern in the...
Authors
Christopher A. Pearl, M. J. Adams, Wendy Wente
Oregon Spotted Frog (Rana pretiosa) movement and demography at Dilman Meadow: Implications for future monitoring Oregon Spotted Frog (Rana pretiosa) movement and demography at Dilman Meadow: Implications for future monitoring
From 2001 to 2005, we studied the demography and seasonal movement of Oregon spotted frogs (Rana pretiosa) translocated into created ponds in Dilman Meadow in central Oregon. Our objectives were to inform future monitoring and management at the site, and to elucidate poorly known aspects of the species’ population ecology. Movement rates revealed complementary use of sites seasonally...
Authors
Nathan D. Chelgren, Christopher A. Pearl, Jay Bowerman, M. J. Adams
Observations of rapid colonization of constructed ponds by Western toad (Bufo boreas) in Oregon, USA Observations of rapid colonization of constructed ponds by Western toad (Bufo boreas) in Oregon, USA
No abstract available.
Authors
Christopher A. Pearl, Jay Bowerman
Taricha granulosa (Rough-skinned newt). Summer habitat and aggregation. Taricha granulosa (Rough-skinned newt). Summer habitat and aggregation.
Terrestrial behavior and habitat associations of post-metamorphic Taricha granulosa are poorly understood (Oliver and McCurdy 1974. Can. J. Zool. 52:541-545; Pimentel 1960. Amer. Midl. Nat. 63:470-496). Chandler (1918. Oregon Agric. Coll. Exper. Sta. Bull. 152:6) referenced Fall T granulosa aggregations in "cavities under stumps, logs, and stones," but does not present specific data...
Authors
Christopher A. Pearl
Taxonomic and geographic variation in oviposition by tailed frogs (Ascaphus spp) Taxonomic and geographic variation in oviposition by tailed frogs (Ascaphus spp)
Tailed frogs (Ascaphus spp.) oviposit in cryptic locations in streams of the Pacific Northwest and Rocky Mountains. This aspect of their life history has restricted our understanding of their reproductive ecology. The recent split of A. montanus in the Rocky Mountains from A. truei was based on molecular differentiation, and comparisons of their ecology are limited. Our objectives were...
Authors
Nancy E. Karraker, David S. Pilliod, M. J. Adams, Evelyn L. Bull, Paul Stephen Corn, Lowell V. Diller, Marc P. Hayes, Blake R. Hossack, Garth R. Hodgson, Erin J. Hyde, Kirk Lohman, Bradford R. Norman, Lisa M. Ollivier, Christopher A. Pearl, Charles R. Peterson
Amphibian occurrence and aquatic invaders in a changing landscape: Implications for wetland mitigation in the Willamette Valley, Oregon Amphibian occurrence and aquatic invaders in a changing landscape: Implications for wetland mitigation in the Willamette Valley, Oregon
Despite concern about the conservation status of amphibians in western North America, few field studies have documented occurrence patterns of amphibians relative to potential stressors. We surveyed wetland fauna in Oregon's Willamette Valley and used an information theoretic approach (AIC) to rank the associations between native amphibian breeding occurrence and wetland characteristics...
Authors
Christopher A. Pearl, M. J. Adams, N. Leuthold, R. Bruce Bury
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: 19
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