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Stephanie K Galvan

I am an Ecologist and Science Data Coordinator at the USGS Forest and Rangeland Ecosystem Science Center

Education and Certifications

  • M.S., Zoology, North Carolina State University (2000)

  • B.S., Zoology, North Carolina State University (1997)

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: 14

Estimation of metademographic rates and landscape connectivity for a conservation-reliant anuran

ContextAmphibian conservation efforts commonly assume populations are tied to waterbodies that collectively function as a metapopulation. This assumption is rarely evaluated, and there is a need to understand the degree of connectivity among patches to appropriately define, manage, and conserve biological populations.ObjectivesOur objectives were to quantify local persistence, colonization, and re
Authors
Adam Duarte, James Peterson, Christopher Pearl, Jennifer Christine Rowe, Brome McCreary, Stephanie Galvan, Michael J. Adams
By
Ecosystems Mission Area, Cooperative Research Units, Forest and Rangeland Ecosystem Science Center

Disentangling effects of invasive species and habitat while accounting for observer error in a long-term amphibian study

The invasive American bullfrog (Lithobates catesbeianus) and a variety of non‐native sport fish commonly co‐occur in lowland lentic habitats of the western United States. Both invasive taxa are implicated in declines of native amphibians in this region, but few long‐term studies of communities exist. Further, field studies of invasive–native interactions are complicated by confounding habitat modi
Authors
Jennifer Rowe, Adam Duarte, Christopher Pearl, Brome McCreary, Stephanie Galvan, James T. Peterson, Michael J. Adams
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Effect of cattle exclosures on Columbia Spotted Frog abundance

Livestock grazing is an important land use in the western USA and can have positive or negative effects on amphibians. Columbia Spotted Frog (Rana luteiventris) often use ponds that provide water for cattle. We conducted a long-term manipulative study on US Forest Service land in northeastern Oregon to determine the effects of full and partial exclosures that limited cattle access to ponds used by
Authors
M. J. Adams, Christopher Pearl, Thierry Chambert, Brome McCreary, Stephanie Galvan, Jennifer Rowe
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Short-term occupancy and abundance dynamics of the Oregon spotted frog (Rana pretiosa) across its core range

The Oregon spotted frog (Rana pretiosa) occupies only a fraction of its original range and is listed as Threatened under the Endangered Species Act. We surveyed 93 sites in a rotating frame design (2010–13) in the Klamath and Deschutes Basins, Oregon, which encompass most of the species’ core extant range. Oregon spotted frogs are declining in abundance and probability of site occupancy. We did no
Authors
M. J. Adams, Christopher A. Pearl, Brome McCreary, Stephanie Galvan
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

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 cluster of bree
Authors
M. J. Adams, Chad Mellison, Stephanie K. Galvan
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Non-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 rela
Authors
M. J. Adams, Christopher A. Pearl, Stephanie Galvan, Brome McCreary
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Non-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 rela
Authors
Michael J. Adams, Christopher Pearl, Stephanie Galvan, Brome McCreary
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Columbia 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 pre
Authors
Chistopher A. Pearl, Stephanie K. Galvan, M. J. Adams, Brome McCreary
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Using occupancy models to understand the distribution of an amphibian pathogen, Batrachochytrium dendrobatidis

Batrachochytrium dendrobatidis is a fungal pathogen that is receiving attention around the world for its role in amphibian declines. Study of its occurrence patterns is hampered by false negatives: the failure to detect the pathogen when it is present. Occupancy models are a useful but currently underutilized tool for analyzing detection data when the probability of detecting a species is <1. We u
Authors
M. J. Adams, Nathan Chelgren, David M. Reinitz, Rebecca A. Cole, L.J. Rachowicz, Stephanie Galvan, Brome McCreary, Christopher A. Pearl, Larissa L. Bailey, Jamie B. Bettaso, Evelyn L. Bull, Matthias Leu
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center, National Wildlife Health Center

Short-term effect of cattle exclosures on Columbia Spotted Frog (Rana luteiventris) populations and habitat in northeastern Oregon

Livestock grazing is a common land use across the western United States, but concerns have been raised regarding its potential to affect amphibian populations. We studied the short-term effects of full and partial livestock grazing exclosures on Rana luteiventris (Columbia Spotted Frog) populations using a controlled manipulative field experiment with pre- and posttreatment data (2002–2006). Despi
Authors
M. J. Adams, Christopher Pearl, Brome McCreary, Stephanie Galvan, Stephanie J. Wessell, Wendy Wente, Chauncey W. Anderson, Allison B. Kuehl
By
Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

Occurrence of Batrachochytrium dendrobatidis in amphibian populations in Denmark

[No abstract available]
Authors
R. Scalera, M.J. Adams, S.K. Galvan
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Batrachochytrium dendrobatidis in Amphibian populations in Italy

[No abstract available]
Authors
M.J. Adams, S. Galvan, R. Scalera, C. Grieco, R. Sindaco
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center
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Image of the contents of a repeat photo stake folder.

Developing a USGS Legacy Data Inventory to Preserve and Release Historical USGS Data

Legacy data (n) - Information stored in an old or obsolete format or computer system that is, therefore, difficult to access or process. (Business Dictionary, 2016) For over 135 years, the U.S. Geological Survey has collected diverse information about the natural world and how it interacts with society. Much of this legacy information is one-of-a-kind and in danger of being lost forever through d
By
Core Science Systems Mission Area, Science Analytics and Synthesis (SAS) Program, Community for Data Integration (CDI), Earth Resources Observation and Science (EROS) Center , Fort Collins Science Center, Great Lakes Science Center
link

Developing a USGS Legacy Data Inventory to Preserve and Release Historical USGS Data

Legacy data (n) - Information stored in an old or obsolete format or computer system that is, therefore, difficult to access or process. (Business Dictionary, 2016) For over 135 years, the U.S. Geological Survey has collected diverse information about the natural world and how it interacts with society. Much of this legacy information is one-of-a-kind and in danger of being lost forever through d
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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.

North Coast and Cascades Network consolidated amphibian database (1984-2005)

This data set is an amalgamation of twenty-nine original data sets, which represent amphibian surveys in the seven national parks comprising the North Coast and Cascades Network (NCCN) of the National Park Service. The data were collected from 1984-2005, and include the localities of 19 species of amphibians at various life stages, 18 native to the Pacific Northwest and one invasive species.
By
Forest and Rangeland Ecosystem Science Center

Oregon spotted frog (Rana pretiosa) monitoring data for metademographic analysis 2010-2018, Oregon

This dataset contains information from surveys conducted 2010-2018 by USGS as part of a long-term Oregon spotted frog monitoring effort in the central Oregon range. Data consist of site, survey, habitat, and species detection covariates, as well as inter-site distance measurements.
By
Forest and Rangeland Ecosystem Science Center

Long-term amphibian monitoring data from the Willamette Valley, Oregon (2004-2015)

This dataset contains information from surveys conducted 2004-2015 by USGS as part of a long-term amphibian monitoring effort in the Willamette Valley, Oregon. Data consist of site, survey, habitat, and species detection covariates.
By
Forest and Rangeland Ecosystem Science Center

Oregon Spotted Frog (Rana pretiosa) Monitoring at Jack Creek 2015-2018 (final)

This dataset contains information from mark-recapture and egg mass surveys conducted 2015-2018 by USGS as part of an ongoing Oregon spotted frog (Rana pretiosa) monitoring effort at Jack Creek, Klamath County, Oregon. Data consist of spotted frog counts (handled by surveyors) aggregated by date, location, life stage, and sex, as well as data on environmental conditions at the time each survey. Not
By
Forest and Rangeland Ecosystem Science Center

Vegetation data from Columbia spotted frog (Rana luteiventris) exclosure study in eastern Oregon

We studied the short-term effects of full and partial livestock grazing exclosures on Columbia Spotted Frog (CSF; Rana luteiventris) populations using a controlled manipulative field experiment with pre- and post-treatment data. This dataset includes vegetation data collected 2002-2010 and 2013 at 94 lakes and ponds in and around the Blue Mountains in eastern Oregon. Data collection followed stand
By
Forest and Rangeland Ecosystem Science Center
Image: Measuring a Frog in the Cascades
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