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22 record(s) found.

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 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.
Data Release Shasta Salamanders Surveys for the Shasta-Trinity National Forest (ver. 2.0, July 2020)
Authors: Brian J Halstead; Patrick M Kleeman
Date: 2019-11-26 | Outlet: USGS - Science Base
The Shasta salamander (Hydromantes shastae) has been petitioned for listing under the Endangered Species Act. The greatest threat to the species is likely habitat loss that will be caused by the increase in elevation of Shasta Lake that will occur with proposed increases in the height of Shasta Dam to increase water storage capacity and maintain cold water for Chinook salmon (Oncorhynchus tshawytscha). Another potential threat is the fungus Batrachochytrium salamandrivorans, which has not yet been detected in North America but is lethal to related salamanders (Hydromantes strinatii) in Europe (Martel et al. 2014). In addition to these threats, recent genetic evidence suggests that the species as originally petitioned consists of three distinct species: H. shastae, H. samweli, and H. wintu (Bingham et al. 2018). Herein, we treat the species complex as a single entity because of difficulty distinguishing among the different species in the field. Recent work has increased knowledge about the habitat types within which Shasta salamanders can be found to include volcanic rock outcrops and areas of mature forest with scattered rocks, but no outcrops (Nauman and Olson 2004). To our knowledge, however, surveys to date have not accounted for the possibility of false absences, though Nauman and Olson (2004) used reference sites to ensure that Shasta salamanders were available on the surface to be detected. Systematic surveys that quantify and account for detection probabilities are needed to distinguish between true and false absences and their results would contribute information about habitat suitability and the distribution of the species. This information is vital to estimate what portion of the species complex would be lost to inundation when the elevation of Shasta Lake is raised and to identify potential refugia or recipient sites for translocations.
Data Release Site and Survey Data for Amphibian Surveys in Yosemite National Park, 2018
Authors: Brian J Halstead; Patrick M Kleeman
Date: 2020-11-19 | Outlet: USGS - Science Base
These data represent occupancy surveys conducted in long-term monitoring sites in Yosemite National Park in 2018 for three anurans, the Yosemite Toad (Anaxyrus canorus), the Sierran Treefrog (Pseudacris sierra), and the Sierra Nevada Yellow-legged Frog (Rana sierrae). The data include independent double-observer surveys and time-to-detection data to calculate detection probabilities and account for false negatives, or the failure to detect a species at a site where it occurs.
Data Release Site and Survey Data for Dixie Valley Toads in Churchill County, Nevada, 2019
Authors: Brian J Halstead; Patrick M Kleeman
Date: 2020-11-19 | Outlet: USGS - Science Base
These data include site- and survey-specific information for occupancy surveys of Dixie Valley Toads (Anaxyrus williamsi) collected in the Dixie Valley, Churchill County, Nevada, in May 2019. The data include both multiple surveys of the same sites and time-to-detection information to quantify detection probabilities and account for imperfect detection in assessments of Dixie Valley Toad occupancy.
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 North Coast and Cascades Network consolidated amphibian database (1984-2005)
Authors: S Galvan; M J Adams; B Samora; S E Stonum; P J Happe; R S Glesne; A Rawhouser
Date: 2020-10-20
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
Data Release Data from visual encounter and acoustic monitoring surveys targeting amphibians and reptiles in Big Thicket National Preserve in southeast Texas from August 2010 to September 2018
Authors: B M Glorioso; J Hardin Waddle
Date: 2020-08-07
This dataset contains data from visual encounter and acoustic surveys in Big Thicket National Preserve in Texas from August 2010 to September 2018. This dataset also includes salinity measurements from nine salinity loggers deployed in the study area.
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 Bd and Bsal Prevalence in Gulf Coast waterdogs captured from St. Tammany Parish, Louisiana, in 2015
Authors: B M Glorioso; J Hardin Waddle
Date: 2017-06-22
The dataset includes information on all 76 Gulf Coast waterdogs captured including sex and size information along with the results of the tests for the two fungal pathogens.
Data Release Data from a national survey for the amphibian chytrid fungus Batrachochytrium salamandrivorans
Authors: J Hardin Waddle; D A Grear; B M Glorioso; A R Backlin; William J Barichivich; A B Brand; Daniel L Calhoun; Jill Fleming; A Dietrich; Patrick M Kleeman; M A Cruz
Date: 2019-05-22
This dataset provides the results of a national survey of the conterminous U.S. for the salamander chytrid fungus Batrachochytrium salamandrivorans (Bsal) conducted by the U.S. Geological Survey Amphibian Research and Monitoring Initiative from May 2014 to August 2017. Sites were sampled by capturing amphibians by hand or by traps or nets that were then swabbed individually using methods that prevent sample contamination. All swabs were then analyzed using a real-time TaqMan PCR for detection of B. salamandrivorans on the extracted DNA. The data consist of locality information and data on the individual sampled, as well as the result of the test for B. salamandrivorans. No cases of B. salamandrivorans were detected in this study.
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 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 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.