Stephanie K Galvan

Science and Products

• 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: 14

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  TypeArticleBookBook ChapterConference PaperNewsletterOtherReportThesis

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  Year20232022202120202019201820172016201520142013201220112010200920082007200620052004200320022001200019991998199719961995

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  May 23, 2020

  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

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  Ecosystems Mission Area, Cooperative Research Units, Forest and Rangeland Ecosystem Science Center

  April 2, 2019

  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

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  Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

  February 26, 2018

  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

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  Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

  November 4, 2014

  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

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  Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

  February 13, 2013

  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

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  Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

  September 9, 2011

  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

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  Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

  January 1, 2011

  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

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  Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

  October 2, 2010

  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

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  Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

  January 1, 2010

  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

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  Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center, National Wildlife Health Center

  January 1, 2009

  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

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  Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

  January 1, 2008

  Occurrence of Batrachochytrium dendrobatidis in amphibian populations in Denmark

  [No abstract available]

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  Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

  January 1, 2008

  Batrachochytrium dendrobatidis in Amphibian populations in Italy

  [No abstract available]

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  Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center
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  March 3, 2016

  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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  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

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  March 3, 2016

  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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• 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.

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  October 20, 2020

  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.

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  Forest and Rangeland Ecosystem Science Center

  August 18, 2020

  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.

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  Forest and Rangeland Ecosystem Science Center

  March 28, 2019

  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.

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  Forest and Rangeland Ecosystem Science Center

  February 11, 2019

  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

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  Forest and Rangeland Ecosystem Science Center

  February 8, 2018

  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

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  Forest and Rangeland Ecosystem Science Center
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