AndreaBozzo/ceres-open-data-index huggingface dataset:
Spatial Variation in Biofouling of a Unionid Mussel (Lampsilis siliquoidea) Across the Western Basin of Lake Erie Data

Invasion of North American waters by Dreissena polymorpha and
D. rostriformis bugensis has resulted in declines in native North
American Unionoida mussels.  Dreissenid mussels biofoul unionid
mussels in large numbers and interfere with unionid movement,
acquisition of food and ability to open and close their shells.
Initial expectations for the Great Lakes were that unionids would be
extirpated where they co-occur with dreissenids, but recently adult
and juvenile unionids have been found alive in several apparent
refugia.  These unionid populations may persist due to reduced
dreissenid biofouling in these areas, and/or due to processes that
remove biofoulers.  For example, locations inaccessible to veligers
may reduce biofouling and habitats with soft substrates may allow
unionids to burrow and thus remove dreissenids.  Here, biofouling was
measured by deploying caged unionid mussels (Lampsilis siliquoidea) at
36 sites across the western basin of Lake Erie to assess spatial
variation in biofouling and to identify other areas that might promote
the persistence or recovery of native unionid mussels.  Biofouling
ranged from 0.03 – 26.33 g per mussel, reached a maximum in the
immediate vicinity of the Maumee rivermouth, and appeared to primarily
consist of dreissenid mussels.  A known mussel refugium in the
vicinity of a power plant near the Maumee rivermouth actually
exhibited very high biofouling rates, suggesting low dreissenid
colonization is unlikely to be the primary cause of unionid survival
in this refugium.  The southern nearshore area of Lake Erie, near
another refugium, also had very low biofouling. A large stretch of the
western basin appeared to have low biofouling rates and muddy
substrates, raising the possibility that these open water areas could
support remnant and returning populations of unionid mussels.

Tags: biofouling, ecological-process-monitoring, lake-erie, ohio, usgs-55f02a2ee4b0dacf699ea024
Organization: Department of the Interior
Principal Aquifers of the 48 Conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands

This map layer contains the shallowest principal aquifers of the conterminous United States, 
Hawaii, Puerto Rico, and the U.S. Virgin Islands, portrayed as polygons.  The map layer 
was developed as part of the effort to produce the maps published at 1:2,500,000 in the 
printed series "Ground Water Atlas of the United States". The published maps contain 
base and cultural features not included in these data.  This is a replacement for the July 
1998 map layer called Principal Aquifers of the 48 Conterminous United States.

Tags: alabama, aquifer, arizona, arkansas, california, colorado, connecticut, conterminous-united-states, delaware, district-of-columbia, environment, florida, geohydrology, georgia, geoscientificinformation, groundwater, hawaii, hydrogeology, idaho, illinois, indiana, inlandwaters, iowa, kansas, kentucky, louisiana, maine, maryland, massachusetts, michigan, minnesota, mississippi, missouri, montana, nebraska, nevada, new-hampshire, new-jersey, new-mexico, new-york, north-carolina, north-dakota, ohio, oklahoma, oregon, pennsylvania, puerto-rico, rhode-island, south-carolina, south-dakota, tennessee, texas, u-s-virgin-islands, united-states, usgs-551a02f7-9c31-4ab3-b6f3-0841b1f05958, utah, vermont, virginia, washington, west-virginia, wisconsin, wyoming
Organization: Department of the Interior
MGL1109bathyutm.tif: Multibeam bathymetry data collected by the U.S. Geological Survey in the Gulf of Alaska in 2011 during cruise MGL1109, 100-meter gridded data in GeoTIFF format, UTM 6 coordinates

This raster dataset represents approximately 69,060 square kilometers of Simrad EM122 multibeam-bathymetry data collected in the Gulf of Alaska during U.S. Geological Survey - Coastal and Marine Geology Program cruise MGL1109 aboard the R/V Marcus G. Langseth. The data have been reduced for position, elevation, orientation, water-column sound-speed, and refraction effects.

Tags: aleutian-basin, aleutian-trench, baranof-fan, bathymetry, bathymetry-and-elevation, bering-sea, bowers-ridge, bowie-seamount, cmhrp, coastal-and-marine-hazards-and-resources-program, continental-shelf, dutch-harbor, environment, extended-continental-shelf, geoscientificinformation, geospatial-datasets, gulf-of-alaska, kodiak-island, kodiak-seamount, marine-geophysics, multibeam-echo-sounder, multibeam-sonar, oceans, pacific-coastal-and-marine-science-center, pcmsc, physical-habitats-and-geomorphology, shirshov-ridge, surveyor-fan, u-s-geological-survey, umnak-plateau, usgs, usgs-55ef1991e4b0dacf699e9440
Organization: Department of the Interior
Airborne geophysical survey: Copper Mountain, Wyoming Parts 1 and 2

Aeromagnetic data were collected along flight lines by instruments in an
aircraft that recorded magnetic-field values and locations.  This dataset
presents latitude, longitude, altitude, and magnetic-field values.

Tags: aeromagnetic-data, aeromagnetic-surveying, airborne-surveys, copper-mountain, f56013-fremont, f56017-hot-springs, field-monitoring-stations, geophysical-surveys, geophysics, geospatial-datasets, magnetic, magnetic-field-earth, magnetic-surveys, residual-magnetic-field, total-field, united-states, usgs-55eb9fa0-ac2f-425c-ac64-29a55eae69f1, wy, wyoming
Organization: Department of the Interior
Range_Extent_15

The GIS layer "Range_extent_15" is a simple polyline representing the geographic distribution of the southern sea otter (Enhydra lutris nereis) in mainland California, based on data collected during the spring 2015 range-wide census. The USGS range-wide sea otter census has been undertaken twice a year since 1982, once in May and once in October, using consistent methodology involving both ground-based and aerial-based counts. The spring census is considered more accurate than the fall count, and provides the primary basis for gauging population trends by State and Federal management agencies. Sea otter distribution in California (the mainland range) is considered to comprise a band of potential habitat stretching along the coast of California, and bounded to the north and south by range limits defined as "the points farthest from the range center at which 5 or more otters are counted within a 10km contiguous stretch of coastline (as measured along the 10m bathymetric contour) during the two most recent spring censuses, or at which these same criteria were met in the previous year".

Tags: aerial-counts, biota, california, central-california-coast, coast, distribution, environment, oceans, range, sea-otter-census, sea-otters, shore-counts, southern-california-coast, usgs-55e61386e4b05561fa2087fa
Organization: Department of the Interior
Census_sum_15

The GIS layer "Census_sum_15" provides a standardized tool for examining spatial patterns in abundance and demographic trends of the southern sea otter (Enhydra lutris nereis), based on data collected during the spring 2015 range-wide census. The USGS range-wide sea otter census has been undertaken twice a year since 1982, once in May and once in October, using consistent methodology involving both ground-based and aerial-based counts. The spring census is considered more accurate than the fall count, and provides the primary basis for gauging population trends by State and Federal management agencies. This Shape file includes a series of summary statistics derived from the raw census data, including sea otter density (otters per square km of habitat), linear density (otters per km of coastline), relative pup abundance (ratio of pups to independent animals) and 5-year population trend (calculated as exponential rate of change). All statistics are calculated and plotted for small sections of habitat in order to illustrate local variation in these statistics across the entire mainland distribution of sea otters in California (as of 2015). Sea otter habitat is considered to extend offshore from the mean low tide line and out to the 60m isobath: this depth range includes over 99% of sea otter feeding dives, based on dive-depth data from radio tagged sea otters (Tinker et al 2006, 2007). Sea otter distribution in California (the mainland range) is considered to comprise this band of potential habitat stretching along the coast of California, and bounded to the north and south by range limits defined as "the points farthest from the range center at which 5 or more otters are counted within a 10km contiguous stretch of coastline (as measured along the 10m bathymetric contour) during the two most recent spring censuses, or at which these same criteria were met in the previous year". The polygon corresponding to the range definition was then sub-divided into onshore/offshore strips roughly 500 meters in width. The boundaries between these strips correspond to ATOS (As-The-Otter-Swims) points, which are arbitrary locations established approximately every 500 meters along a smoothed 5 fathom bathymetric contour (line) offshore of the State of California.

Tags: aerial-counts, biota, california, central-california-coast, coast, environment, habitat, oceans, sea-otter-census, shore-counts, southern-california-coast, trends, usgs-55e60f3ce4b05561fa2087e9
Organization: Department of the Interior
MGL1111bathygeo.sd: Multibeam bathymetry data collected by the U.S. Geological Survey in the Bering Sea in 2011 during cruise MGL1111, 100-meter gridded data in Fledermaus digital terrain format, geographic (latitude, longitude) coordinates

This raster dataset represents approximately 49,581 square kilometers of Simrad EM122 multibeam backscatter-intensity data collected in the Bering Sea during U.S. Geological Survey (USGS) cruise MGL1111 aboard the R/V Marcus G. Langseth. Calibrated backscatter-intensity time-series data were adjusted for range-angle, beam pattern, and power-gain distortions.

Tags: bathymetry, bathymetry-and-elevation, cmhrp, coastal-and-marine-hazards-and-resources-program, continental-shelf, environment, geoscientificinformation, geospatial-datasets, marine-geophysics, multibeam-echo-sounder, multibeam-sonar, oceans, pacific-coastal-and-marine-science-center, pcmsc, physical-habitats-and-geomorphology, seismic-methods, u-s-geological-survey, usgs, usgs-568c35d3e4b0e7594ee778a9
Organization: Department of the Interior
4-m Image of the Southern Half of the Backscatter Intensity Mosaic of the Sea Floor off Eastern Cape Cod from USGS Cruise 98015 (CAPESOUTHMOS_GEO4M_WGS84.TIF, Geographic, WGS84)

This data set includes backscatter intensity of the sea floor offshore of eastern Cape Cod, Massachusetts.  The data were collected with a multibeam sea floor mapping system during USGS survey 98015, conducted November 9 - 25, 1998.  The surveys were conducted using a Simrad EM 1000 multibeam echo sounder mounted aboard the Canadian Coast Guard vessel Frederick G. Creed.  This multibeam system utilizes 60 electronically aimed receive beams spaced at intervals of 2.5 degrees that insonify a strip of sea floor up to 7.5 times the water depth (swath width of 100 to 200 m within the survey area).  The horizontal resolution of the beam on the sea floor is approximately 10% of the water depth.  Vertical resolution is approximately 1 percent of the water depth.
With backscatter intensity, the intensity of the acoustic return from the sea floor from the multibeam system, is a function of the properties of the surficial sediments and of the bottom roughness.  Generally, a strong return (light gray tones) is associated with rock or coarse-grained sediment, and a weak return (dark gray tones) with fine-grained sediments.  However, the micro-topography, such as ripples, burrows, and benthic populations also affect the reflectivity of the sea floor.  Direct observations, using bottom photography or video, and surface samples, are needed to verify interpretations of the backscatter intensity data.  The backscatter data have a weak striping that runs parallel to the ship's track.  Some of the striping is the result of poor data return at nadir that appears as evenly-spaced thin speckled lines. Some striping is also due to critical angle effects, where the intensity of return varies as a function of the angle of incidence of the incoming sound on the seafloor (Hughes-Clark and others, 1997).

Tags: atlantic-ocean, backscatter-intensity, cape-cod, cape-cod-national-seashore-park, cmgp, coastal-and-marine-geology-program, field-activity-number-98015, frederick-g-creed, geographic-information-system, geoscientificinformation, geospatial-datasets, geotiff-image, gray-scale-image, greyscale-image, image-mosaics, imagerybasemapsearthcover, marine-geophysics, massachusetts, multibeam, multibeam-backscatter-mosaic, multibeam-echo-sounder, multibeam-sonar, north-america, oceans, sea-floor-acoustic-reflectivity, sea-floor-geology, sea-floor-mapping, simrad-em1000, surficial-geology, u-s-east-coast, u-s-geological-survey, united-states, usgs, usgs-547e16ab-2d36-449d-8090-21207e437c14, whsc, woods-hole-science-center
Organization: Department of the Interior
Ozark Plateaus seepage point dataset, southern Missouri and northern Arkansas, 1982-2006

This dataset was compiled to summarize discharge measurements from several published groundwater and surface-water studies in the Ozarks of southern Missouri and northern Arkansas. The discharge measurements were part of numerous USGS studies to assess interaction between streams and groundwater aquifers. A gaining stream is described as a surface-water stream that gains water from the groundwater aquifer and a losing stream is described as a surface-water stream that loses water to the groundwater aquifer. This product is intended to be used in surface-water and groundwater investigations assessing water quantity, quality, and availability. The product includes point data of discharge measurements digitized from previously published USGS studies.

Tags: arkansas, discharge, gaining-streams, groundwater, groundwater-resources-program, hydrogeology, inlandwaters, karst, losing-streams, missouri, ozark-aquifer-system, ozark-physiographic-province-ozarks-ozark-highlands, seepage-run, surface-water, usgs-55d61dbce4b0518e3546a64b
Organization: Department of the Interior
Areas of high-backscatter on the GLORIA sidescan sonar image (GLORIA_BRIGHT_NAD83.SHP)

This GIS overlay is a component of the U.S. Geological Survey, Woods Hole Science Center's, Gulf of Mexico GIS database. The Gulf of Mexico GIS database is intended to organize and display USGS held data and provide on-line (WWW) access to the data and/or metadata.

Tags: arcview, cmgp, coastal-and-marine-geology-program, eez, geologic-long-range-inclined-asdic, geoscientificinformation, geospatial-datasets, gloria, gulf-of-mexico-gis-database, interpretation, oceans, polyline, scientific-interpretation, sea-floor-characteristics, shapefile, sidescan-sonar-interpretation, sidescan-sonar-mosaic, u-s-exclusive-economic-zone, u-s-geological-survey, usgs, usgs-55d45045-25ac-4a51-81c2-b48688c4f0ed, vectors, whsc, woods-hole-science-center
Organization: Department of the Interior
Average annual rates of evapotranspiration, quick-flow runoff, and recharge for the CONUS, 2000-2013

This dataset includes 800m resolution long-term average estimates of the distribution of incoming precipitation and groundwater-sourced irrigation into contributions to the evapotranspiration (ET), quick-flow runoff, and effective recharge water budget components over the 2000-2013 time period, as well as annual estimates for the individual years. It also includes other data supporting the methods development that produced these maps, corresponding to the figures in the associated journal article. The estimates were developed with new empirical regressions for (1) quick-flow runoff data generated from a USGS-developed hydrograph separation program (PART) for 1434 gages as a function of surficial geology type (USGS), precipitation (PRISM), and soil hydraulic conductivity (STATSGO); and (2) long-term evapotranspiration from water balance estimates at 679 gages as a function of land cover (NLCD), precipitation (PRISM), and maximum, minimum, and mean daily temperature (PRISM), and a separate estimate for ET over open water. The recharge quantites close the water budget to sum to the total influx from precipitation. Irrigated water quantities reported in the 2005 USGS Water Use dataset are incorporated as effective additional precipitation. Estimates are included for both effective recharge, which reflects the quantity of water available to replenish the groundwater table, and total recharge, which also includes an estimate for the recharge quantity that was subsequently intercepted by riparian vegetation and converted to evapotranspiration. Methods are fully described in the associated accepted publication; this dataset will be updated with its complete citation when published.

Tags: evapotranspiration, runoff, usgs-55d37f80e4b0518e35468e50, water-budget, water-cycle, water-resources
Organization: Department of the Interior
Average annual rates of evapotranspiration, quick-flow runoff, and recharge for the CONUS, 2000-2013

This dataset includes 800m resolution long-term average estimates of the distribution of incoming precipitation and groundwater-sourced irrigation into contributions to the evapotranspiration (ET), quick-flow runoff, and effective recharge water budget components over the 2000-2013 time period, as well as annual estimates for the individual years. It also includes other data supporting the methods development that produced these maps, corresponding to the figures in the associated journal article. The estimates were developed with new empirical regressions for (1) quick-flow runoff data generated from a USGS-developed hydrograph separation program (PART) for 1434 gages as a function of surficial geology type (USGS), precipitation (PRISM), and soil hydraulic conductivity (STATSGO); and (2) long-term evapotranspiration from water balance estimates at 679 gages as a function of land cover (NLCD), precipitation (PRISM), and maximum, minimum, and mean daily temperature (PRISM), and a separate estimate for ET over open water. The recharge quantites close the water budget to sum to the total influx from precipitation. Irrigated water quantities reported in the 2005 USGS Water Use dataset are incorporated as effective additional precipitation. Estimates are included for both effective recharge, which reflects the quantity of water available to replenish the groundwater table, and total recharge, which also includes an estimate for the recharge quantity that was subsequently intercepted by riparian vegetation and converted to evapotranspiration. Methods are fully described in the associated accepted publication; this dataset will be updated with its complete citation when published.

Tags: evapotranspiration, runoff, usgs-55d3730fe4b0518e35468e1e, water-budget, water-cycle, water-resources
Organization: Department of the Interior
Multibeam bathymetry and acoustic backscatter data from the Alaskan region, Extended Continental Shelf Project, 2011 field season: Gulf of Alaska and Bering Sea

This publication releases swath bathymetry and backscatter datasets derived from multibeam bathymetric data acquired by the U.S. Geological Survey (USGS) on the R/V Marcus G. Langseth legs MGL1108 (transit) and MGL1109 in the Gulf of Alaska, and MGL1111 in the Bering Sea. These data were acquired with a Kongsberg Simrad EM-122 multibeam echosounder and Seafloor Information System (SIS) acquisition software. 
The MGL1108 data were combined with the MGL1109 data during processing and are presented as MGL1109.
This data set includes 100-m bathymetry grids generated from processed bathymetry soundings, 100-m backscatter grids generated from coregistered processed backscatter values, extracted center beam bathymetry soundings, and associated metadata. The Gulf of Alaska lines extend from 48.27° N to 57.71° N, 137.81° W to 152.38° W in the northeastern Pacific, including portions of the distal Surveyor and Baranof fan systems, Kodiak-Bowie seamounts, and Aleutian trench near Kodiak Island, AK. The Bering Sea lines extend from 54.04° N to 58.88° N, 166.56° W to 174.04° E, including portions of the Umnak Plateau northwest of Dutch Harbor, AK, central Aleutian Basin, distal eastern flank of Shirshov Ridge, and north face of Bowers Ridge.
These surveys were designed primarily for acquisition of multichannel seismic-reflection imaging and ocean-bottom seismometer OBS velocity analysis in support of Extended Continental Shelf (ECS) maritime zone definition. The USGS activities in mapping the ECS are coordinated through the interagency ECS Task Force, comprising representatives from the U.S. Department of State, the USGS, the National Oceanographic and Atmospheric Administration (NOAA), and several other governmental agencies. Further information on the U.S. Extended Continental Shelf (ECS) Project and its activities is posted at https://www.state.gov/e/oes/ocns/opa/ecs/index.htm.

Tags: aleutian-basin, aleutian-trench, backscatter-intensity, baranof-fan, bathymetry, bathymetry-and-elevation, bathymetry-measurement, bering-sea, bowers-ridge, bowie-seamount, cmhrp, coastal-and-marine-hazards-and-resources-program, continental-shelf, dutch-harbor, environment, extended-continental-shelf, geoscientificinformation, geospatial-datasets, gulf-of-alaska, image-mosaics, kodiak-island, kodiak-seamount, marine-geophysics, multibeam-echo-sounder, multibeam-sonar, oceans, pacific-coastal-and-marine-science-center, pcmsc, physical-habitats-and-geomorphology, sea-floor-acoustic-reflectivity, sea-floor-characteristics, seismic-methods, seismic-reflection-methods, shirshov-ridge, substrate, surveyor-fan, u-s-geological-survey, umnak-plateau, usgs, usgs-55d23737e4b0518e35468abd
Organization: Department of the Interior