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18 record(s) found.

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 Data realease for manuscript: A statistical forecasting approach to metapopulation viability analysis
Authors: P E Howell; Blake R Hossack; Erin Muths; Brent H Sigafus; A Chenevert-Steffler; R B Chandler
Date: 2020 | Outlet: Ecological Applications 2020: e02038
Data release and code for Ecological Applications paper: A statistical forecasting approach to metapopulation viability analysis
Data Release Data from time-constrained visual encounter surveys and acoustic surveys in the Atchafalaya Basin conducted from 2008 through 2016
Authors: B M Glorioso; J Hardin Waddle
Date: 2020-08-13
This dataset contains data from time-constrained visual encounter surveys conducted in the Atchafalaya River Basin in south central Louisiana from February 2008 through July 2016. In addition, it contains vocalization data collected concurrently with the visual encounter surveys and data on presence of tadpoles and larvae. All participants in surveys are included in the dataset. Information for each site, each sample, and each observation is included.
Data Release Data from a 2015 trapping survey targeting the Gulf Coast Waterdog, Necturus beyeri, in Saint Tammany Parish, Louisiana
Authors: B M Glorioso; J Hardin Waddle
Date: 2020-06-05
This dataset provides the data associated with a 2015 project to examine factors affecting the occupancy of Gulf Coast Waterdogs along Bayou Lacombe, Saint Tammany Parish, Louisiana. Data include site locations and distance from headwaters, water data (pH, turbidity, salinity, and depth), and capture data from trap checks. For Necturus beyeri captures, the datatset provides the sex of captures and length and mass measurements. The dataset states whether eggs were visible in females, whether each animal was swabbed for disease and whether tissue was clipped for genetics.
Data Release Oregon spotted frog (Rana pretiosa) monitoring data for metademographic analysis 2010-2018, Oregon: U.S. Geological Survey Data Release
Authors: J C Rowe,; Adam Duarte; J T Peterson; C A Pearl; B McCreary; S Galvan; M J Adams
Date: 2020-05-05 | Outlet: ScienceBase
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.
Data Release Amphibian Occupancy and Effects of Habitat Use on Pesticide Exposure in Iowa Wetlands
Authors: J E Swanson,; Erin Muths; C L Pierce,; M W Vandever,; K L Smalling
Date: 2018-03-09 | Outlet: US Geological Survey Data Release
Amphibians living in agricultural areas encounter many challenges. Two factors affecting individuals in these landscapes are habitat loss and pesticides. This thesis focuses on amphibians using agricultural wetlands in Iowa, where row crops such as corn and soybeans dominate the landscape. The goal of of the first study was to determine the influences of site characteristics on amphibian presence and success. Occupancy analysis was used to estimate proportion of area occupied by four species as a function of eight covariates hypothesized to affect occupancy: fish abundance, salamander abundance, invertebrate density, vegetative cover, wetland area, water atrazine concentration, surrounding crop land use, and overall wetland health score. We surveyed 27 wetlands in 2015 and 2016. Occupancy analysis results indicate almost all covariates were supported in our model sets although their estimated effects were weak. Direction of predicted effects of covariates on amphibians varied by species and life stage. Results show that wetland site occupancy for species in our study ranged from 0.23 to 0.95. Although we did not find strong evidence that the environmental factors we measured influenced amphibian occupancy, we provide insight on amphibian use of a modified agricultural landscape. The goal of the second study was to understand where and when frogs are most susceptible to pesticide exposure and how that exposure relates to accumulation. We hypothesized habitat use would influence a frog’s exposure to pesticides. We radio tracked 72 Northern Leopard Frogs (Lithobates pipiens) in agricultural wetlands and assessed their survival. We used Passive Sampling Devices (PSDs) to test for differences in pesticide exposure among grassland, wetland, and agricultural habitats. We found that pesticide concentration analyzed from PSDs varied among habitat types (P < 0.01) with concentration greatest in agricultural habitats. Amphibians frequently used wetland habitats early in our study, and transitioned into grassland habitats later in the summer, using agricultural fields rarely. Number and concentration of pesticides were greatest in tissues collected in May, but few pesticides were detected in individuals captured in August (P < 0.01 and P < 0.01, respectively). Our results indicate risk of pesticide accumulation is highest in aquatic habitats earlier in the year.
Data Release Data from a turtle trapping effort at a release site of head-started alligator snapping turtles, Macrochelys temminckii, in southwest Louisiana in 2018
Authors: B M Glorioso; C D Battaglia; J Streeter; J Hardin Waddle
Date: 2020-05-01
This dataset contains initial data from head-started alligator snapping turtles released by Louisiana Department of Wildlife and Fisheries (LDWF) from November 2015 to October 2016. In addition, it contains data from a five-day trapping effort at each of seven release sites by the United States Geological Survey (USGS) from late June to early October 2018. Trapping was completed using hoop nets of three sizes. We recaptured eight head-started alligator snapping turtles as well as four individuals native to the creek.
Data Release Data release for manuscript IP-083575, Robert Fire Montana Tailed Frog Data_2001-2015
Authors: Blake R Hossack
Date: 2015
Data release for manuscript summarizing responses of Rocky Mountain Tailed Frogs to the 2003 Robert Fire in Glacier National Park.
Data Release Annotated bibliography of grazing effects on amphibians and their habitats
Authors: J C Rowe; C A Pearl; M J Adams; B McCreary
Date: 2020-03-04 | Outlet: Science Base
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.
Data Release Cascades frog (Rana cascadae) historical site surveys in the Oregon Cascade Range, 2018-2019
Authors: M J Adams; C A Pearl; B McCreary; J C Rowe
Date: 2019-10-11 | Outlet: Science Base
We used visual surveys to document the presence of all life stages of Cascades frog (Rana cascadae) at historically occupied sites. We surveyed 67 sites 1-2 times between May and August of 2018 and 2019. This effort was a continuation of 2001-2004 surveys conducted at the same site pool. This dataset includes counts of amphibians, reptiles, and fish observed during each site survey, as well as habitat covariates.
Data Release Foothill yellow-legged frog (Rana boylii) surveys in Oregon 2019
Authors: M J Adams; C A Pearl; J C Rowe; B McCreary; M Laramie; David S Pilliod
Date: 2019-11-01 | Outlet: Science Base
We used visual surveys and environmental DNA (eDNA) sampling to document the presence of all life stages of foothill yellow-legged frogs (Rana boylii) at historically occupied sites. We visited 52 stream reaches (sites) on federal and private lands between June and September of 2019. This dataset includes counts of amphibians, crayfish, and fish observed during each site survey, as well as habitat and water sampling covariates.
Data Release Oregon spotted frog (Rana pretiosa) telemetry and habitat use at Klamath Marsh National Wildlife Refuge in Oregon, USA
Authors: C A Pearl; J C Rowe; B McCreary; M J Adams
Date: 2019-12-13 | Outlet: Science Base
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.
Data Release Telemetry and habitat data for Oregon spotted frogs (Rana pretiosa) in Oregon, USA
Authors: C A Pearl; B McCreary; J C Rowe; M J Adams
Date: 2018-09-27 | Outlet: Science Base
We used radio-telemetry to study late-season movement and habitat use by the Oregon spotted frog (Rana pretiosa) at 9 sites from 4 populations along the Cascade Mountains in Oregon. This dataset includes individual frog morphometrics, location data, and habitat use during each tracking event that occurred roughly weekly between September and January of 2011, 2012, and 2016.
Data Release Long-term amphibian monitoring data from the Willamette Valley, Oregon (2004-2015): U.S. Geological Survey data release
Authors: M J Adams; C A Pearl; B McCreary; S Galvan; J C Rowe; Adam Duarte; J T Peterson
Date: 2019-03-28 | Outlet: ScienceBase
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.
Data Release Oregon spotted frog (Rana pretiosa) observations in Oregon, 2016-2019: U.S. Geological Survey data release
Authors: M J Adams; C A Pearl; B McCreary; J C Rowe
Date: 2020-03-05 | Outlet: ScienceBase
This dataset contains information from surveys conducted 2016-2018 by USGS as part of an ongoing Oregon spotted frog (Rana pretiosa) monitoring effort in Oregon. USGS research activities in 2016, 2017, and 2018 were divided into six study design categories: breeding (egg mass counts), mid-level (visual encounter surveys for occupancy monitoring), apex (mark-recapture), telemetry, trapping, and water quality (skin microbiome swabbing). Data consist of Oregon spotted frog observations aggregated by date, location, life stage, sex, and project. These data were compiled from multiple studies employing different survey methods, thus we caution users that counts are not directly comparable among projects.
Data Release Oregon Spotted Frog (Rana pretiosa) Monitoring at Jack Creek 2015-2018 (final): U.S. Geological Survey data release
Authors: M J Adams; C A Pearl; B McCreary; S Galvan; J C Rowe
Date: 2019-02-11 | Outlet: ScienceBase
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. Note that due to updates in access permissions, surveyed area within each site varies over time. Thus, counts are not comparable among year, as surveyed area was not held constant.
Data Release Terrestrial salamander captures after the 2003 Clark Fire, Willamette National Forest, OR: U.S. Geological Survey data release
Authors: N D Chelgren; M J Adams; B McCreary; C A Pearl; J C Rowe
Date: 2019-05-21 | Outlet: ScienceBase
Data are the result of fixed-area, time-constrained searches for terrestrial salamanders within and nearby a wildfire-affected area of the Willamette National Forest, OR. The spatial extent of the study was within one kilometer of the border of the Clark fire that burned an area of 2,009 ha in 2003. Site surveys occurred during March and April, 2005. An important feature of the data is that 100m2 sub-plots (nested within plots) were repeatedly searched for terrestrial salamanders independently up to nine times so that variation in the probability of capture could be estimated and accounted for concurrent with estimates of occupancy probability.
Data Release Columbia Spotted Frog (Rana luteiventris) Breeding at Grazing Exclosures in Eastern Oregon 2002-2010 and 2013: U.S. Geological Survey data release
Authors: M J Adams; C A Pearl; B McCreary; S Galvan; J C Rowe
Date: 2018-02-01 | Outlet: ScienceBase
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 standardized survey protocols and included annual oviposition surveys and vegetation surveys. These data allowed for quantification of CSF breeding as related to vegetation within and outside of grazing exclosures at each site.