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Folders: ROOT > ScienceBase Catalog > Eastern Ecological Science Center > Quantitative Methods & Decision Science ( Show all descendants )

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This data set is comprised of 3 files of information collected on amphibians and vernal pool habitats at Canaan Valley National Wildlife Refuge from 2004 - 2016.
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We conducted ground-based surveys at 589 randomly selected 16-ha plots on the Yukon-Kuskokwim Delta, Alaska during 2015-2016. The plots were selected using a stratified random sampling plan in an area of 35,769 square km divided into 8 physiographic strata. The population totals from the stratified random design estimators were adjusted using detection ratios derived with a double sampling protocol (Bart and Earnst 2002) on a subset of plots in Alaska.The subset of plots used for double sampling included 17 study plots on the Yukon Delta National Wildlife Refuge (9 plots in 2001-2002 [McCaffery et al. 2012] and 8 plots in 2016), and 33 plots located on the North Slope of Alaska (Utqiaġvik [6 plots, 2014–2015], the...
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Includes data used to estimate population demographic parameters for an exemplary high-elevation amphibian species, the federally endangered Shenandoah salamander (Plethodon shenandoah). These parameters were entered into a Markov projection model which we used to forecast the future population status of the Shenandoah salamander.
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We conducted population and habitat assessments for Mountain Plovers in Texas during winters of 2019 and 2020. We used roadside surveys and distance-sampling to estimate bird density and calculate population totals for the study area, which included parts of five ecoregions (Chihuahuan Deserts, High Plains, Central Great Plains, Southern Texas Plains, Texas Blackland Prairies, and Western Gulf Coastal Plain). In 2019, we surveyed 103 transects along 3,032 km (1,884 mi) and, in 2020, we surveyed 152 transects along 4,985 km (3,098 mi). When driving along transects, we stopped every 3.2 km (2 mi) to assess habitat conditions (vegetation height, vegetation density, etc.) and land cover (National Land Cover Database...
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The data set consists of capture information on individual box turtles at Patuxent Research Refuge Laurel, MD. Location, date, morphometrics, and other information.
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The Shenanadoah Salamander (Plethodon shenandoah) is an endangered salamander found only in the mountains of Shenandoah National Park. Field surveys of the salamander were conducted from 2007-2022 using daytime cover object surveys. In order to capture the totality of P. shendandoah’s range we sampled from low to high elevation across a broad geographic range. We created a spatial generalized additive model with aspect, latitude, longitude, and elevation and heat load index (HLI) to predict salamander occupancy and create a new range map based on our extended surveys. All spatial covariates were extracted from a 15m digital elevation model layer of Shenandoah National Park. Temperature and precipitaiton data were...


    map background search result map search result map Patuxent box turtle data set 2020 Long-term effects of timber harvest on vernal pool availability and occupancy of two obligate amphibians Data for "Population Dynamics and Harvest Management of Eastern Mallards" Abiotic and biotic factors reduce viability of a high-elevation salamander in its native range Mountain Plover population and habitat assessments in Texas, 2019–2020 Breeding Shorebird Surveys on the Yukon-Kuskokwim Delta, Alaska, 2015-2016 An updated range map for Plethodon shenandoah Long-term effects of timber harvest on vernal pool availability and occupancy of two obligate amphibians Abiotic and biotic factors reduce viability of a high-elevation salamander in its native range An updated range map for Plethodon shenandoah Patuxent box turtle data set 2020 Mountain Plover population and habitat assessments in Texas, 2019–2020 Breeding Shorebird Surveys on the Yukon-Kuskokwim Delta, Alaska, 2015-2016 Data for "Population Dynamics and Harvest Management of Eastern Mallards"