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51 record(s) found.

Data Release Vernal pool inundation models
Authors: Jennifer M Cartwright; TL Morelli; Evan HC Grant
Date: 2020-06
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.
Data Release Capture-mark-recapture data for Oregon spotted frogs [Rana pretiosa] along the Deschutes River, Oregon, 2016-2019
Authors: Jennifer C Rowe; Adam Duarte; Chris A Pearl; B McCreary; P K Haggerty; Michael J Adams
Date: 2021-06-04 | Outlet: Ecosphere, v. 12, no. 6, p. e03634
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.
Data Release Data from a turtle trapping effort targeting alligator snapping turtles (Macrochelys temminckii) in the Atchafalaya Basin beginning in 2019
Authors: Brad M Glorioso; J Hardin Waddle
Date: 2021-10-25 | Outlet: ScienceBase
This dataset contains data from an ongoing trapping effort beginning in 2019 targeting alligator snapping turtles (Macrochelys temminckii) in the Atchafalaya Basin of south-central Louisiana.
Data Release Data from a 2019 occupancy survey of alligator snapping turtles, Macrochelys temminckii, in south-central Louisiana
Authors: Brad M Glorioso; J Hardin Waddle
Date: 2021-09-14 | Outlet: ScienceBase
This dataset contains data on trapping methodology, turtle captures, and environmental variables from a trapping effort targeting alligator snapping turtles (Macrochelys temminckii) in south-central Louisiana in 2019.
Data Release Chiricahua leopard frog - Arizona: influence of landscape features on landscape resistance and colonization dynamics (presence data, wind speed, air temp; hydroperiod spatial coordinates)
Authors: Erin Muths; P E Howell; Blake R Hossack; J Chandler
Outlet: Figshare
Data used in the manuscript presenting a novel spatially explicit modeling framework for narrowing the divide between these disciplines to advance understanding of the effects of landscape structure on metapopulation dynamics.
Data Release complex ecological relationships-boreal toads-disease
Authors: Erin Muths; Brittany A Mosher; Kathryn P Huyvaert; Larissa L Bailey
Outlet: Dryad
Data used in manuscript that examines several potential factors influencing disease dynamics in the boreal toad–disease system: geographic isolation of populations, amphibian community richness, elevational differences, and habitat permanence.
Data Release Chorus frog density and population growth, Cameron Pass, Colorado, 1986-2020
Authors: Erin Muths
Outlet: USGS
Data used in Bayesian formulation of an open population capture-recapture model with >30 years of data to examine intrinsic and extrinsic factors regulating two populations of adult boreal chorus frogs (Pseudacris maculata).
Data Release Effects of Snowpack, Temperature, and Disease on Demography in a Wild Population of Amphibians
Authors: Erin Muths
Outlet: USGS
Data used in an assessment of the effects of snowpack, temperature and disease on demography in boreal toads in Wyoming.
Data Release Amphibian Occupancy and Effects of Habitat Use on Pesticide Exposure in Iowa Wetlands
Authors: Don Dennerline
Outlet: USGS
Data used in manuscript applying occupancy analysis to estimate presence of four anuran species at wetlands in northern Iowa as a function of eight environmental
covariates hypothesized to affect occupancy.
Data Release Handling times: tagging vs photos, Boreal toads in WY/CO 2020
Authors: Erin Muths
Outlet: USGS
comparison of handling times - PIT (passive integrated transponder) tagging versus photography for boreal toads in Wyoming and Colorado
Data Release Survival and sublethal effects of amphibians exposed to NaCl and brines from energy production
Authors: B J Tornabene; Creagh W Breuner; Blake R Hossack
Date: 2019-06-25 | Outlet: PANGAEA Data Publisher for Earth & Environmental Science
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[I/]) and Leopard Frogs (Rana pipiens[I/]) and Barred Tiger Salamanders (Ambystoma mavortium[I/]) 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:
Data Release Corticosterone Mediates Lethal and Sublethal Effects and a Growth-Survival Tradeoff for a Larval Amphibian Exposed to Increased Salinity
Authors: B J Tornabene; Blake R Hossack; E J Crespi; Creagh W Breuner
Date: 2018-11-06 | Outlet: PANGAEA Data Publisher for Earth & Environmental Science
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:
Data Release Hatching success, survival, size and development, and behavioral data for two amphibian species exposed to NaCl and energy-related saline wastewaters
Authors: B J Tornabene; Creagh W Breuner; Blake R Hossack
Date: 2021-09-24 | Outlet: figshare
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.
Data Release Larval amphibian and site-water corticosterone, and site attributes, from wetlands affected by energy-related saline wastewaters
Authors: B J Tornabene; Blake R Hossack; E J Crespi; Creagh W Breuner
Date: 2021-09-24 | Outlet: figshare
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.
Data Release Aldosterone and corticosterone of a larval amphibian exposed to increased salinity
Authors: B J Tornabene; Creagh W Breuner; Blake R Hossack; E J Crespi
Date: 2021-09-29 | Outlet: figshare
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.
Data Release Current use pesticides in larval amphibian tissues, amphibian pathogen and wetland sediment screening data from three northeastern National Wildlife Refuges, 2013-14
Authors: K L Smalling; Adam Boehlke; L Iwanowicz; Michelle L Hladik; Keith A Loftin; R Femmer; Adrianne B Brand; Evan HC Grant
Outlet: U.S. Geological Survey Data Release
The data include concentrations of current use pesticides in tissues of larval wood frog (Lithobates sylvaticus) and spotted salamander (Ambystoma maculatum) and the presence of ranavirus in wood frogs and spotted salamanders from three northeastern National Wildlife Refuges sampled in 2013 and 2014. The data also include estrogenicity, protein phosphatase 2A inhibition and a suite of 15 major and minor elements in sediment screened using portable X-Ray Fluorescence. The data include sediment and tissue samples collected from 16 wetlands at the Patuxent Research Refuge (PRR) in central Maryland, USA, 15 wetlands at the Assabet River and Oxbow National Wildlife Refuges (EMASS) in eastern Massachusetts, USA, and nine wetlands at the Chesapeake and Ohio Canal National Historic Park (CHOH) near the border of Washington DC and Maryland, USA.
Data Release Metal concentrations in sediment and amphibian tissues from wetlands sampled across the United States
Authors: K L Smalling
Date: 2021-05-09 | Outlet: US Geological Survey data release
Data Release Occurrence of amphibians in Northern California Coastal Dune Drainages
Authors: Brian J Halstead; Patrick M Kleeman
Date: 2017-08-22 | Outlet: USGS - Science Base
Many coastal dune ecosystems have been degraded by non-native dune vegetation, but these systems might still provide valuable habitat for some taxa, including amphibians. Because restoration of degraded dune systems is occurring and likely to continue, we examined the occurrence of amphibians in drainages associated with a coastal dune ecosystem degraded by invasive plants (European Beachgrass, Ammophila arenaria, and Iceplant, Carpobrotus edulis). We found that occupancy of three amphibian species (California Red-legged Frog, Rana draytonii; sierran treefrog, Pseudacris sierra; and Rough-skinned Newt, Taricha granulosa) among 21 coastal dune drainages was high, with most coastal dune drainages occupied by all three species. Furthermore, reproduction of Sierran Treefrogs and California Red-legged Frogs was estimated to occur in approximately half and one-third of the drainages, respectively. The probability of occurrence of Rough-skinned Newts and pre-metamorphic life stages of both anurans decreased during the study, perhaps because of ongoing drought in California or precipitation-induced changes in phenology during the final year of the study. Maintaining structural cover and moist features during dune restoration will likely benefit native amphibian populations inhabiting coastal dune ecosystems.
Data Release California Red-Legged Frogs in Point Reyes coastal dune drainages (2015)
Authors: Brian J Halstead; Patrick M Kleeman
Date: 2017-05-22 | Outlet: USGS - Science Base
California Red-legged Frogs (Rana draytonii) are typically regarded as inhabitants of permanent ponds, marshes, and slow-moving streams, but their ecology in other habitats, including coastal dunes, remains obscure. To avoid and minimize potential negative effects of dune restoration activities, we studied the spatial ecology, habitat selection, and survival of California Red-legged Frogs in coastal dune drainages at Point Reyes National Seashore, California. Frogs remained in their home drainages throughout the summer, and, with some notable exceptions, most remained close to water. Home ranges of California Red-legged Frogs in dunes were generally small, and they selected areas near water with logs that served as refuge from environmental extremes and predators. California Red-legged Frogs avoided invasive dune plants, and had high survival rates in coastal dune drainages. Whether frogs will use dunes dominated by native species in the same manner as they use dunes degraded by non-native plants, and whether a more dynamic dune ecosystem will maintain the microhabitats necessary to support California Red-legged Frog populations in the future remains unknown.
Data Release Time to detection data for Point Reyes pond-breeding amphibians, 2017
Authors: Brian J Halstead; Patrick M Kleeman; Jonathan P Rose
Date: 2018-12-14 | Outlet: USGS - Science Base
Occupancy models provide a reliable method of estimating species distributions while accounting for imperfect detectability. The cost of accounting for false absences is that detection and nondetection surveys typically require repeated visits to a site or multiple-observer techniques. More efficient methods of collecting data to estimate detection probabilities would allow additional sites to be surveyed for the same amount of effort, which would support more precise estimation of covariate effects to improve inference about underlying ecological processes. Time-to-detection surveys allow the estimation of detection probability based on a single site visit by one observer, and therefore might be an efficient technique for herpetological occupancy studies. We evaluated the use of time-to-detection surveys to estimate the occupancy of pond-breeding amphibians at Point Reyes National Seashore, California, USA, including variables that affected detection rates and the probability of occurrence. We found that detection times were short enough, and occupancy was high enough, to reliably estimate the probability of occurrence of three pond-breeding amphibians at Point Reyes National Seashore, and that survey and site conditions had species-specific effects on detection rates. In particular, pond characteristics affected detection times of all commonly detected species. Probability of occurrence of Sierran Treefrogs (Hyliola sierra) and Rough-skinned Newts (Taricha granulosa) was negatively related to the detection of fish and pond area. Time-to-detection surveys can provide an efficient method for estimating detection probabilities and accounting for false absences in occupancy studies of reptiles and amphibians.