1,160 Works

Data release for persistence of historical population structure in an endangered species despite near-complete biome conversion in Californias San Joaquin Desert

Jonathan Q. Richmond, Dustin A. Wood, Michael F. Westphal, Amy G. Vandergast, Robert N Fisher &
The recency of large-scale land conversion in Californias San Joaquin Desert raises the probability that the regions numerous endemic species still retain genetic signatures of historical population connectivity. If so, genomic data can serve as a guidance tool for conserving lands that once supported habitat for gene movement. We studied the genetic structuring of the endangered blunt-nosed leopard lizard Gambelia sila, a San Joaquin Desert endemic, to (1) test whether patterns of population admixture could...

Whole-Rock Major-Major-Element Chemistry Data for Granitic Rocks on the Kern Plateau, Southern Sierra Nevada, California

Michael F. Diggles & Diane Clemens-Knott
In the summers of 1982 through 1985, the U.S. Geological Survey conducted geologic studies Bureau of Land Management Wilderness Study Areas on the Kern Plateau as well as the U.S. Forest Service South Sierra Wilderness and South Sierra Roadless Area. These study areas are underlain mostly by granitic rocks of the Sierra Nevada batholith. In support of geologic mapping and mineral-resource assessment, 74 samples were analyzed for major-element oxides (SiO2, Al2O3, Fe Total, MgO, CaO,...

Water level measurements collected in West Falmouth Harbor, MA, 2016: U.S. Geological Survey data release

Christopher R Sherwood, Steven E Suttles, Sandra M. Brosnahan & Ellyn T Montgomery
Water-level gauges were deployed at two sites in West Falmouth Harbor between May and October 2016. Two sequential deployments were required to provide measurements for the entire period. One gauge was mounted under the town-owned West Falmouth boat dock and the other on the private Associates dock near the mouth of the Harbor. Each gauge supported two pressure sensors mounted in a stilling well to damp wave motions. The stilling wells were 4-inch diameter PVC...

Data Release for the influence of data characteristics on detecting wetland/stream surface-water connections in the Delmarva Peninsula, Maryland and Delaware

Melanie K. Vanderhoof & Megan Lang
The datasets were generated for the Upper Choptank River Watershed in Maryland and Delaware. Depressions and the total stream network were derived from a lidar DEM collected during AprilJune 2003 (vertical accuracy root mean square error (RMSE) = 14.3 cm) and MarchApril 2006 (vertical accuracy RMSE = 18.5 cm) for Maryland (1 m resolution) and April 2007 (vertical accuracy RMSE = 18.5 cm) for Delaware (3 m resolution)). Three Landsat images were used to create...

Bathymetry, backscatter intensity, and geomorphology of the sea floor of the Hudson Canyon and adjacent slope and rise

Brian Buczkowski, William Danforth, David C. Twichell & Peter A. Rona
A multibeam survey was carried out in 2002 to map the bathymetry and backscatter intensity of the sea floor of the Hudson Canyon and adjacent slope and rise. The Canyon begins on the outer continental shelf off the eastern coast of the United States at about 100-meter (m) water depth and extends offshore southeastward across the continental slope and rise. The survey covered an area approximately 205 kilometers (km) in the offshore direction, extending from...

Evapotranspiration units and potential areas of groundwater discharge delineated July 2024, 2009 in the upper Humboldt River Basin, northeastern Nevada

J. LaRue Smith, Toby L. Welborn & Rose L Medina
This USGS data release represents the evapotranspiration units and potential areas of groundwater discharge geospatial data from the following publication: Plume, R.W., and Smith, J.L., 2013, Properties of basin-fill deposits, a 19712000 water budget, and surface-water-groundwater interactions in the upper Humboldt River basin, northeastern Nevada: U.S. Geological Survey Scientific Investigations Report 2013-5077, 38 p., http://pubs.usgs.gov/sir/2013/5077/. The data set consists of 2 separate items: 1. evapotranspiration units 2. potential areas of groundwater discharge

Switchgrass biofuel potential ensemble map for eastern Nebraska

Yingxin Gu & Bruce K. Wylie
Switchgrass (Panicum virgatum) has been evaluated as one potential source for cellulosic biofuel feedstocks. Planting switchgrass in marginal croplands and waterway buffers can reduce soil erosion, improve water quality, and improve regional ecosystem services (i.e., it serves as a potential carbon sink). In this study, we integrated marginal croplands, highly erodible cropland buffers, and future crop expansion information to develop a switchgrass biofuel potential ensemble map for current and future croplands in eastern Nebraska.

A comparison of four pore water sampling methods for mixed metals and dissolved organic carbon, and implications for toxicity evaluations-Data

Danielle M Cleveland
These replicate data support the findings described in the publication, "A comparison of four pore water sampling methods for mixed metals and dissolved organic carbon, and implications for sediment toxicity evaluations" by Danielle Cleveland, William G. Brumbaugh, and Donald D. MacDonald (Environmental Toxicology and Chemistry 2017). The data represent comparison of four commonly-applied techniques for obtaining pore water samples for the quantification of nickel, copper, zinc, arsenic, cadmium, lead and dissolved organic carbon (DOC), including...

California spotted owl fledgling counts, climate, and landscape habitat at territories on the Lassen National Forest, CA 1991-2010

Brian S. Cade
This is a comma separated values (csv) file used to conduct the logistic quantile regression analyses in R provided by Cade et al. (2017. Logistic quantile regression provides improved estimates for bounded avian counts: A case study of California spotted owl fledgling production. The Auk: Ornithological Advances. In press). The data set consists of records of California spotted owl fledgling counts on 88 territories on the Lassen National Forest, CA from 1991-2010. Climatic conditions for...

Data for Comparison of Size, Terminal Fall Velocity, and Density of Bighead, Silver, and Grass Carp Eggs for use in Drift Modeling

Amy E. George, Tatiana Garcia & Duane C Chapman
Invasive Asian carps established in the United States spawn in turbulent water of rivers and their eggs and early larvae develop while drifting in the current. The eggs are slightly denser than water and are held in suspension by water turbulence. The eggs are believed to perish if they settle before hatching. It is thus possible to use egg drift modeling to assess the capability of a river to support survival of Asian carp eggs....

Data Associated with Uranium Background Concentrations at Homestake Mining Company Superfund Site near Milan, New Mexico, July 2016 through October 2016

Kent D. Becher, Johanna M.T. Blake, Philip T. Harte, Jonathan V. Thomas & Victoria G. Stengel
To help characterize the groundwater system at Homestake Mining Company Superfund Site near Milan, New Mexico, the U.S. Geological Survey collected borehole geophysical and groundwater-quality data in cooperation with the U.S. Environmental Protection Agency during JulyOctober 2016. The following borehole geophysical data were collected from wells at or near the Homestake Mining Company Superfund Site: induction, fluid resistivity, natural gamma, spectral gamma, fluid temperature, caliper, casing collar locator, optical televiewer, and electromagnetic flow meter logging...

Reproductive strategy, spawning induction, spawning temperatures and early life history of captive sicklefin chub Macrhybopsis meeki-Data

Janice L. Alber & Mark L. Wildhaber
Macrhybopsis reproduction and propagule traits were studied in the laboratory using two temperature regimes and three hormone treatments and which methods produced the most spawns. Only sicklefin chub (M. meeki) spawned successfully although sturgeon chub (M. gelida) released unfertilized eggs. All temperature and hormone treatments produced M. meeki spawns, but two treatments had similar success rates at 44 and 43%, consisting of a constant daily temperature with no hormone added, or daily temperature fluctuations with...

Experimental analysis of Elliptio complanata transcriptional response to salt stress

Laura Robertson, Heather S Galbraith, Deborah Iwanowicz, Carrie J Blakeslee & Robert Scott Cornman
To identify potential biomarkers of salt stress in the freshwater mussel Elliptio complanata, we examined transcriptional responses of the common mussel Elliptio complanata to controlled NaCl exposures. The data set is a table of counts, with the rows being the transcripts detected in the samples in the experiment and the columns identifying the samples. Four mussles were exposed to normal freshwater and four mussels were exposed to high salinity (two ppt), for a period of...

Vertical Land Change in Select Counties of Kentucky, Minnesota, and Wisconsin

Dean B Gesch, Sandra K Poppenga & B.B. Worstell
The Vertical Land Change project is an assessment of the impacts of surface mining in Perry County, Kentucky, the Mesabi Iron Range in northeastern Minnesota, and the west central part of Wisconsin. This project builds and expands upon previous vertical land change efforts (Gesch, 2006) by conducting research into the issues surrounding the integration of 3D data products with 2D remote sensing imagery products to improve monitoring, assessment, and projection of land change by including...

Tree Species Preferences of Foraging Songbirds During Spring Migration in Floodplain Forests of the Upper Mississippi River: data

Eileen M Kirsch & Mike J Wellik
We evaluated bird foraging preferences for tree species during spring migration 2010-2013. We used the point center-quarter method to assess relative availability (tree importance values, IV) of tree species and tallied bird foraging observations on tree species as well as recording the phenophase of used trees on five 40 ha plots of contiguous floodplain forest between La Crosse, Wisconsin, and New Albin, Iowa, from 15 April through 1 June 2010-2013. We quantified bird preferences by...

Hormone, pesticide, pharmaceutical and other organic compound data for select water and bed sediment samples collected in Chesapeake Bay watershed in parts of Maryland, Pennsylvania, Virginia, and West Virginia, 2006-2014

Patrick J Phillips, Tia-Marie Scott, K. Smalling & D. Kolpin
These data represent water and bed sediment samples analyzed for a variety of organic compounds. The samples were collected in streams and rivers in the Chesapeake Bay watershed from 2006-2014. Water samples were collected from 61 sites and analyzed for hormones (SH2434 method; Tables 1A and 1B), pharmaceuticals (SH2080 method; Tables 2A and 2B), wastewater indicators (SH1433 method; Tables 3A and 3B), and antibiotics (LCAB method; Tables 4A and 4B). Select water samples were analyzed...

GIS shapefiles for Kilauea's episode 61g lava flow, Pu`u `O`o eruption: May 2016 to May 2017

Tim R. Orr, Michael Zoeller, Matthew Patrick & Liliana DeSmither
This dataset contains shapefiles and associated metadata for Kīlauea volcano's Puu Ōō episode 61g lava flow from May 24, 2016 through May 31, 2017. Episode 61g began with a breakout from the east flank of Puu Ōō on May 24, 2016. Lava reached the Pacific Ocean at Kamokuna on July 26, 2017, and began building a lava delta that extended seaward from the original coastline. This lava delta collapsed into the ocean on December 31,...

Local Radiocarbon Reservoir Age (ΔR) Variability from the Nearshore and Open-Ocean Environments of the Florida Keys Reef Tract During the Holocene and Associated U-Series and Radiocarbon Data

Lauren T Toth, Hai Cheng, R. Lawrence Edwards, Erica Ashe & Julie N Richey
Holocene-aged corals from reef cores collected throughout the Florida Keys reef tract (FKRT; Fig. 1) were dated using a combination of U-series and radiocarbon techniques to quantify the millennial-scale variability in the local radiocarbon reservoir age (ΔR) of the shallow water environments of south Florida. ΔR provides a measure of the deviation of local radiocarbon concentrations of marine environments from the global average and can be used as a tracer of oceanic circulation and local...

7Q10 records and basin characteristics for 224 basins in South Carolina, Georgia, and Alabama (2015)

Scott C. Worland, William H. Farmer & Julie E Kiang
This data release provides the data and R scripts used for the 2017 submitted publication titled "Improving predictions of hydrological low-flow indices in ungaged basins using machine learning". There are two .csv files and 14 R-scripts included below. The lowflow_sc_ga_al_gagesII_2015.csv datafile contains the annual minimum seven-day mean streamflow with an annual exceedance probability of 90% (7Q10) for 224 basins in South Carolina, Georgia, and Alabama. The datafile also contains 231 basin characteristics from the Gages...

Demersal fish assemblages on seamounts and other rugged features in the northeastern Caribbean

Andrea Quattrini, Amanda W Demopoulos, Randal Singer, Adela Roa-Varon & J.D. Chaytor
Recent investigations of demersal fish communities in deep (less than 50 m) rugged habitats have considerably increased our knowledge of the factors that influence the assemblage structure of fishes across mesophotic to deep-sea depths. Although habitat types influence deepwater fish distribution, whether different rugged seafloor features provide functionally equivalent habitat for fishes is poorly understood. In the northeastern Caribbean, numerous rugged seafloor features (e.g., seamounts, banks, canyons) punctuate insular margins, and thus create a remarkable...

Lake Erie, Western Basin Aquatic Vegetation

Jenny L Hanson
Observations and subtle shifts of vegetation communities in western Lake Erie have USGS researchers concerned about the potential for Grass Carp to alter these vegetation communities. Broad-scale surveys of vegetation using remote sensing and GIS mapping, coupled with on-the-ground samples in key locations will permit assessment of the effect Grass Carp may have already had on aquatic vegetation communities and establish baseline conditions for assessing future effects. Existing aerial imagery was used with object-based image...

Use of alternating and pulsed direct current electrified fields for zebra mussel control : data

James A Luoma, Jan Dean, Todd J Severson, Jeremy K Wise & Matthew T Barbour
Alternatives to chemicals for controlling dreissenid mussels are desirable for environmental compatibility, but few alternatives exist. Previous studies have evaluated the use of electrified fields for stunning and/or killing planktonic life stages of dreissenid mussels, however, the available literature on the use of electrified fields to control adult dreissenid mussels is limited. We evaluated the effects of sinusoidal alternating current (AC) and square- wave pulse direct current (PDC) exposure on the survival of zebra mussels...

Monarch threats data

Wayne E Thogmartin
Data are population size estimates for monarch butterflies overwintering in Mexico as well as 76 potential stressors and 3 correlates. These stressors include disease, pesticide, herbicide, temperature, precipitation, and habitat loss measured for Mexican overwintering area and Southern, North Central, and Northeastern breeding areas.

Data release for Qualitative data-model comparison of Last Glacial Maximum simulations with an ice sheet model

Jay R Alder & Steven W Hostetler
The data release consists of a single NetCDF file with results from a suite of ice sheet model simulations. We ran with Community Ice Sheet Model (CISM2) with input from models used in the Palaeoclimate Modelling Intercomparison 3 (PMIP3). The NetCDF file contains output from model year 5000 for a limited number of variables to keep the file size reasonably small. This subset of variables are the ones we focus our analysis and paper on.

Shoreline change analysis of coastal and estuarine shorelines in Barnegat and Great Bays, NJ: 1839 to 2012

Kathryn Smith & Joseph F Terrano
Shoreline erosion is a significant issue for many coastal states, and as coastal populations continue to grow, these data will become increasingly important for managing coastal habitats and communities. The data presented here include compiled vectorized shorelines and transects with shoreline change rates for both estuarine and open-ocean shorelines in Barnegat and Great Bays, New Jersey. Shoreline change was calculated from digital vector shorelines acquired from historical topographic sheets, aerial photography, and/or lidar. Shoreline change...

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