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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Walter J Sadinski Skye C Corbett Geology, Minerals, Energy, and Geophysics Science Center U.S. Geological Survey Brian Collins Elizabeth J Horton Natural Hazards Tag Types Theme (8) Place (8) USGS Scientific Topic Keyword (1) Harvest Set (1) Tag Schemes None (8) ISO 19115 Topic Category (7) Geographic Names Information System (GNIS) (1) USGS Thesaurus (1) View Results as: JSON ATOM CSV

Yosemite Toad (Anaxyrus canorus) project datasets; climate, disease, predation, and hatching success data These data are associated with an article published in Global Ecology and Conservation (https://doi.org/10.1016/j.gecco.2020.e01173) that describes climate's cascading effects on disease, predation, and hatching sucess in the Yosemite toad (Anaxyrus canorus). The Yosemite toad currently is federally listed as threatened under the U.S. Endanered Species Act based upon reported population declines and vulnerability to climate and other global-change factors. The species occurs only in California’s central Sierra Nevada at medium to sub-alpine elevations. Lands throughout its range largely are protected from development, but climate and other global-change factors potentially can limit populations. Categories: Data; Tags: Inyo National Forest, Saprolegnia diclina, Sierra Nevada, Sierra Nevada, Tioga Pass, CA, All tags... UV-B, Yosemite National Park, biota, disease, embryo mortality, freezing, predatory flatworms, sub-alpine wetlands, Fewer tags Egg-mass depths for Anaxyrus canorus and Pseudacris regilla at various breeding sites near Tioga Pass, California, USA, in 1996, 1998, 1999, and 2000 We produced this data set as part of a larger, integrated study to assess the statuses of populations of Anaxyrus canorus and the causes of observed effects on fitness at field sites, primarily in Yosemite National Park near Tioga Pass, from 1996 to 2001. To assess and document the depths to the tops of individual A. canorus and Pseudacris regilla egg masses and to the sediments, we measured water depths at masses of both species. We used a meter stick to measure the depth (nearest mm) where female A. canorus deposited individual egg masses, and the distance from the water’s surface to the tops of those masses, at several breeding sites across 1996, 1998, 1999, and 2000. We did the same for egg masses of P. regilla... Categories: Data; Tags: Inyo National Forest, Saprolegnia diclina, Sierra Nevada, Sierra Nevada, Tioga Pass, California, All tags... UV-B, Yosemite National Park, biota, disease, embryo mortality, freezing, predatory flatworms, sub-alpine wetlands, Fewer tags Effects of exposure to ambient UV-B on embryos of Anaxyrus canorus and Pseudacris regilla at various breeding sites near Tioga Pass, California, USA, in 1996 and 1998 We produced this data set as part of a larger, integrated study to assess the statuses of populations of Anaxyrus canorus and the causes of observed effects on fitness at field sites, primarily in Yosemite National Park near Tioga Pass, from 1996 to 2001. ENCLOSURES We used field enclosures to test the hypothesis that exposure to ambient UV-B caused embryo mortality in 1996 and 1998. We covered the top of each enclosure with one or two types of thin plastic sheeting. One type was transparent to the solar spectrum. The other type filtered UV-B below 314 nm (UV-B<314) but was otherwise transparent to solar radiation. Laying both types together over the top of an enclosure did not alter the transmission characteristics... Categories: Data; Tags: Inyo National Forest, Saprolegnia diclina, Sierra Nevada, Sierra Nevada, Tioga Pass, CA, All tags... UV-B, Yosemite National Park, biota, disease, embryo mortality, freezing, predatory flatworms, sub-alpine wetlands, Fewer tags Embryo mortality for Anaxyrus canorus and Pseudacris regilla at various breeding sites near Tioga Pass, California, USA, from 1996 to 2001 We produced this data set as part of a larger, integrated study to assess the statuses of populations of Anaxyrus canorus and the causes of observed effects on fitness at field sites, primarily in Yosemite National Park near Tioga Pass, from 1996 to 2001. We assessed the extent of annual mortality among embryos of A. canorus and Pseudacris regilla variously among breeding sites and years by measuring hatching success in as many individual egg masses as possible, given logistical constraints, at sites we surveyed annually from 1996 to 2000. We visually evaluated each individual embryo in an egg mass in situ while kneeling alongside it immediately before, at, or very soon after hatching (when individual capsules remained... Categories: Data; Tags: Inyo National Forest, Saprolegnia diclina, Sierra Nevada, Sierra Nevada, Tiogo Pass, California, All tags... UV-B, Yosemite National Park, biota, disease, embryo mortality, freezing, predatory flatworms, sub-alpine wetlands, Fewer tags Developmental stage at Anaxyrus canorus embryos died at various breeding sites We produced this data set as part of a larger, integrated study to assess the statuses of populations of Anaxyrus canorus and the causes of observed effects on fitness at field sites, primarily in Yosemite National Park near Tioga Pass, from 1996 to 2001. We assessed the three general categories (early, mid, and late) for the developmental stage at which embryos of A. canorus died among various breeding sites from 1999 to 2001. We visually evaluated each individual embryo in an egg mass in situ while kneeling alongside it immediately before, at, or very soon after hatching (when individual capsules remained from hatched embryos and when any remnants of dead embryos typically still were visible). We did not assess... Categories: Data; Tags: Inyo National Forest, Saprolegnia diclina, Sierra Nevada, Sierra Nevada, Tioga Pass, CA, All tags... UV-B, Yosemite National Park, biota, disease, embryo mortality, freezing, predatory flatworms, sub-alpine wetlands, Fewer tags Embryo mortality relative to the abundance category of the water mold, Saprolegnia diclina, and an unidentified predatory flatworm (Turbellaria spp.) for egg masses of Anaxyrus canorus at various breeding sites near Tioga Pass, California, USA, in 2001 We produced this data set as part of a larger, integrated study to assess the statuses of populations of Anaxyrus canorus and the causes of observed effects on fitness at field sites, primarily in Yosemite National Park near Tioga Pass, from 1996 to 2001. To assess embryo mortality, we visually evaluated each individual embryo in an egg mass in situ while kneeling alongside it immediately before, at, or very soon after hatching (when individual capsules remained from hatched embryos and when any remnants of dead embryos typically still were visible). We did not assess mortality in any egg masses that had deteriorated too far to evaluate embryos. In 2001, a limited number of field personnel caused us to estimate... Categories: Data; Tags: Inyo National Forest, Saprolegnia diclina, Sierra Nevada, Sierra Nevadas, Tioga Pass, CA, All tags... UV-B, Yosemite National Park, biota, disease, embryo mortality, freezing, predatory flatworms, sub-alpine wetlands, Fewer tags Mortality resulting from two field experiments regarding freezing potential for embryos of Anaxyrus canorus at various breeding sites near Tioga Pass, California, USA, in 1999 and 2000 and for one laboratory experiment in 2000 at the Sierra Nevada Aquatic Research Laboratory in Mammoth Lakes, California, USA We produced this data set as part of a larger, integrated study to assess the statuses of populations of Anaxyrus canorus and the causes of observed effects on fitness at field sites, primarily in Yosemite National Park near Tioga Pass, from 1996 to 2001. We conducted a field experiment in 1999 to test for effects of enclosing embryos of A. canorus and moving them to slightly deeper water, thereby reducing the potential for exposure to ice and freezing temperatures, on hatching success at five breeding sites. We split freshly laid egg masses approximately into halves. We left one indiscriminately chosen half of each mass where it was deposited originally (replicates of which were scattered among the shallow waters)... Categories: Data; Tags: Inyo National Forest, Saprolegnia diclina, Sierra Nevada, Sierra Nevada, Tioga Pass, CA, All tags... UV-B, Yosemite National Park, biota, disease, embryo mortality, freezing, predatory flatworms, sub-alpine wetlands, Fewer tags Field, remote sensing, and modeling data used for Collins et al., Rockfall Kinematics from Massive Rock Cliffs: Outlier Boulders and Flyrock Resulting from the 2020 Whitney Portal, California Rockfalls This data release includes information used to support the manuscript "Rockfall kinematics from massive rock cliffs: outlier boulders and flyrock from Whitney Portal, California rockfalls". The included datasets and supplement include data that was collected and processed to investigate the kinematics of boulder trajectories and impacts to both other boulders and to existing trees on the talus slope beneath the source area cliffs. This data release includes four folders and one .csv file: 1) GIS Data – shapefile (.shp) of runout zone boundary, 2) RockyFor3d Model Data - .asc and .csv files necessary as input for RockyFor3d model, 3) Terrestrial Lidar- .txt file containing the XYZRGB point cloud collected post rockfall... Categories: Data; Tags: California, GMEGSC, Geology, Minerals, Energy, and Geophysics Science Center, Geomorphology, Inyo National Forest, All tags... LHP, Landslide Hazards Program, Remote Sensing, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), United States, Whitney Portal, geomorphology, lidar, rockfall, topography, Fewer tags