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Comma-separated values (.csv) file containing data related to amphibian sampling across the United States between 2016 and 2021. Data files contain mercury concentrations in amphibian and dragonfly tissues, mercury concentrations in sediment, as well as amphibian morphometrics, and habitat and climate characteristics where the samples were collected.

Climate data allow people to examine species distributions and possible distributions. This script takes ERA5-Land climate estimates (https://www.ecmwf.int/en/forecasts/datasets/reanalysis-datasets/era5) for precipitation and lake temperature and processes them to create summary climate layers for use with biological organisms in lakes. This code could be modified to use a different subset of years.

These BioLake raster data provide global estimates (~10.0 x 12.4 km resolution) of twelve bioclimatic variables based on estimated lake temperature. Eleven of these twelve variables (BioLake01 - BioLake11) are estimated for each of three lake strata: lake mix (surface) layer, lake bottom, and total lake water column. These eleven variables correspond to CHELSA (Climatologies at high resolution for the earth's land surface areas) bioclimatic variables BIO1 - BIO11, except that these BioLake variables are based on lake water temperature and CHELSA BIO1 - BIO11 variables are based on air temperature. CHELSA BIO is also calculated a finer spatial resolution (~1 x 1 km). The twelfth variable (BioLake20; months with non-zero ice cover) does not correspond to any CHELSA bioclimatic variable. The data are supplied as a multi-layer raster (.grd) file in the World Mollweide projection, accompanied by a header file (.gri) with layer names.

For BioLake layer download, see https://doi.org/10.5066/P96QLN5Y

These BioLake raster data provide global estimates (~10.0 x 12.4 km resolution) of twelve bioclimatic variables based on estimated lake temperature. Eleven of these twelve variables (BioLake01 - BioLake11) are estimated for each of three lake strata: lake mix (surface) layer, lake bottom, and total lake water column. These eleven variables correspond to CHELSA (Climatologies at high resolution for the earth's land surface areas) bioclimatic variables BIO1 - BIO11, except that these BioLake variables are based on lake water temperature and CHELSA BIO1 - BIO11 variables are based on air temperature. CHELSA BIO is also calculated a finer spatial resolution (~1 x 1 km). The twelfth variable (BioLake20; months with non-zero ice cover) does not correspond to any CHELSA bioclimatic variable. The data are supplied as a multi-layer raster (.grd) file in the World Mollweide projection, accompanied by a header file (.gri) with layer names.

This Data Release represents geospatial and tabular data for a study investigating linkages between local terrain and wetland hydroperiod and was supported by the U.S. Geological Survey (USGS) Amphibian Research and Monitoring Initiative (ARMI). This dataset contains wetland water level data from Saint Marks National Wildlife Refuge (SMNWR). Data include records of water level and water temperature measurements from select wetlands beginning in July 2010 and ending in 2019. Not all wetlands span this entire period as different phases of studies resulted in different time periods of data collection. Instrumentation included a staff gage and a non-vented continuous logging pressure transducer that logged data at 1-hour intervals. The dataset consists of 4 separate items:
1. water level monitoring site Locations (tabular data)
2. wetland perimeters (GIS vector data)
3. water level and water temperature data for 59 select wetlands (tabular data)
4. revision history text file that describes the changes from the original release to version 2.0.

This website provides an application for exploring modeling results from a U.S. Geological Survey (USGS) project titled Mapping Climate Change Resistant Vernal Pools in the Northeastern U.S. The purpose of this project was to improve understanding of the factors that control inundation patterns in vernal pools of the northeastern United States, so as to identify pools that might function as hydrologic refugia under climate change.

Altered flow regimes can contribute to dissociation between life history strategies and environmental conditions, leading to reduced persistence reported for many wildlife populations inhabiting regulated rivers. The Oregon spotted frog Rana pretiosa is a threatened species occurring in floodplains, ponds, and wetlands in the Pacific Northwest with a core range in Oregon, USA. All life stages of R. pretiosa are reliant on aquatic habitats, and inundation patterns across the phenological timeline can have implications for population success. We conducted capture–mark–recapture (CMR) sampling of adult and subadult R. pretiosa at three sites along the Deschutes River downstream from two dams that regulate flows. We related the seasonal extent of inundated habitat at each site to monthly survival probabilities using a robust design CMR model. We also developed matrix projection models to simulate population dynamics into the future under current river flows. Monthly survival was strongly associated with the extent and variability of inundated habitat, suggesting some within-season fluctuations at higher water levels could be beneficial. Seasonal survival was lowest in the winter for all three sites, owing to limited water availability and the greater number of months within this season relative to other seasons. Population growth for the two river-connected sites was most strongly linked to adult survival, whereas population growth at the river-disconnected site was most strongly tied to survival in juvenile stages. This research identifies population effects of seasonally limited water and highlights conservation potential of enhancing survival of particularly influential life stages.

We investigated the influence of brines and NaCl alone at commensurate concentrations on three larval amphibian species that occur in areas with energy-related brine contamination. The dataset contains size information (mass in grams, snout-vent length in millimeters) of larval Boreal Chorus Frogs (Pseudacris maculata) and Leopard Frogs (Rana pipiens) and Barred Tiger Salamanders (Ambystoma mavortium) taken during 96-h lethal-concentration-50 experiments. Larvae were generally exposed to concentrations of brine or NaCl ranging from 0–8,000 mg/L increasing by 1,000 mg/L increments. Other associated dataset: https://doi.pangaea.de/10.1594/PANGAEA.913836

We investigated the influence of increased salinity on survival, growth, water content, and Corticosterone responses of larval Northern Leopard Frogs (Rana pipiens) by exposing them to environmentally-relevant salinity treatments for 24 days. We also inhibited Corticosterone for half of the replicates using mifepristone to determine if Corticosterone mediates effects of salinity and tradeoffs between traits. Other associated datasets:
https://doi.pangaea.de/10.1594/PANGAEA.919212
https://doi.pangaea.de/10.1594/PANGAEA.919211
https://doi.pangaea.de/10.1594/PANGAEA.919209

We investigated the relative effects of NaCl and energy-related saline wastewaters on hatching success, survival, size and development, and behaviors of northern leopard frogs ([i]Rana pipiens[/i]) and boreal chorus frogs ([i]Pseudacris maculata[/i]). Eggs were exposed and responses were tracked through hatching for 24 days. Five datasets are included. (1) Includes hatching and survival data for leopard frog eggs and larvae. (2) Includes hatching and survival data for chorus frog eggs and larvae. (3) Includes behavioral responses of both species monitored daily from day 9–24. (4) Includes morphology measurements from larval leopard frogs taken at the end of the experiment on day 24. (5) Includes morphology measurements from larval leopard frogs taken at the end of the experiment on day 24.

We investigated the influence of salinity from energy-related saline wastewaters on CORT of three larval amphibians (Tiger salamanders, Leopard frogs, and Chorus frogs) in Montana and North Dakota where wastewater contamination is pervasive. We measured baseline and stress-induced CORT (pg/h) of amphibians exposed to a gradient of wastewaters using a novel, noninvasive technique. We also measured background corticosterone in site water in 2017 and 2018, and evaluated variance within and among wetlands in 2019. Three datasets are included. (1) Includes corticosterone and morphology measurements from larval amphibians taken in 2017 and 2018. (2) Includes background corticosterone measurements and attributes from sites in 2017–2019. (3) Includes background corticosterone measurements for 5 points along the perimeter of 6 sites in 2019 to evaluate variance within and among wetlands.

We exposed larval leopard frogs to increased salinity and RU486 (a glucocorticoid receptor antagonist) and tested their influence on waterborne corticosterone (baseline and stress-induced) and aldosterone and relationships between the two adrenal steroid hormones.

To relate water levels in our study wetlands to temperature, precipitation, wetland water depth, and amphibian calling activity, we installed one pressure logger in the deepest spot we could find in each wetland. Soon after thawing conditions allowed, we drove a plastic pipe (anchor pipe) into the sediments at the deepest location and secured another pipe to it that contained one pressure logger (Onset Computer Corporation Model U20-001-04 [Bourne, MA, USA]) suspended approximately 2.5 cm above the sediments. We installed additional individual pressure loggers in the upper part of the logger pipes (in air) at select locations to measure barometric pressure for calibrating the submerged loggers’ readings. We measured pressure once per hour and used software supplied by the logger manufacturers to upload and convert data to depth at the end of each season.

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.

Jarchow, C.J., and Sigafus, B.H., 2019, Surface water data for isolated stock ponds in southern Arizona, USA and northern Sonora, Mexico: U.S. Geological Survey data release, https://doi.org/10.5066/P95ZFPT1.

Data release for water quality information from the Goose Lake Study Site, northeastern Montana.

Data release for data collected from Prairie Pothole wetlands.

Data release for acoustic monitoring of amphibians at 3 mine sites.

Livestock grazing is one of the most common land uses in the western United States, where multiple amphibians of conservation concern use habitats that are grazed. Despite the common intersection of grazing and sensitive amphibian species, there are very few reviews of research related to the issue. USGS researchers compiled and summarized literature pertaining to livestock grazing effects on amphibians and their habitats, with an emphasis on wetland-breeding species in the western United States. Users of the annotated bibliography can utilize an integrated search tool with user-defined criteria to query records and output results. This tool aids users in synthesizing research related to a range of specific questions and should assist land managers in evaluating and implementing grazing while maintaining habitat for wetland amphibians.

We used radio-telemetry to study late-season movement and habitat use by Oregon spotted frogs (Rana pretiosa) at Klamath Marsh National Wildlife Refuge in Oregon. This data release includes frog location and habitat use data, as well as visualizations of telemetry data. Tracking events occurred roughly weekly between August and December of 2017.

The data was gathered to determine the effects of cattle grazing on wetland water quality in the Klamath National Wildlife Refuge in Oregon. Surface water samples from sites representing a range of grazing histories were collected between June and October in 2017 and 2018. Samples were analyzed for nutrients (ammonia, nitrate plus nitrite, nitrite and orthophosphate), total coliforms, E. coli, enterococci and estrogenicity by US Geological Survey laboratories. Basic water quality parameters such as temperature, pH, turbidity and specific conductance were also collected in the field during each site visit. Quality assurance samples (blanks and replicates) as well as method information is also included in the data release.