{"accessLevel": "public", "bureauCode": ["010:24"], "contactPoint": {"@type": "vcard:Contact", "fn": "NPS IRMA Help", "hasEmail": "mailto:NRSS_DataStore@nps.gov"}, "description": "GIS point data of stations in which biological and sediment grab samples were collected.  Collection of benthic infauna and epifauna used a 0.04 m2 Ted Young Modified Van Veen grab. Three replicate benthic samples were collected at 23 sites to total 69 samples in Year 1.   The samples were immediately sieved over a 0.5 mm mesh screen.  The residue remaining on the screen was fixed in 3.7% formaldehyde solution in seawater, buffered with sodium borate and containing Rose Bengal to stain organisms. A fourth grab was collected for sediment analysis. Sediment for grain size analysis was wet-sieved through a 63\u03bcm-mesh sieve in distilled water with dispersant to disaggregate and separate the silt and clay fraction from the sand-sized fraction.  Silt and clay mass was determined by drying a known volume of the water-particle mixture passing through the sieve.  The sand fraction was dried and then sieved into the following size fractions: <63 \u00b5m (silt), 63-125 \u00b5m (very fine sand), 125-250 \u00b5m (fine sand), 250-500 \u00b5m (medium sand), 500-1000 \u00b5m (coarse sand), >1000 \u00b5m (very coarse sand).  Each fraction was weighed. The mass of the <4\u03c6 fraction was further analyzed using a Spectrex model PC-2000 laser particle counter (Spectrex Corporation, Redwood City, CA) Counts of particles were obtained corresponding to these additional size categories: 5\u03c6 (4-8 \u00b5m very fine silt), and 6\u03c6 (16-31 \u00b5m, medium silt), 7\u03c6 (8-16 \u00b5m, fine silt), 8 \u03c6 ( 4-8 \u00b5m, very fine silt), and 9 \u03c6 (2-4 \u00b5m, clay). Particle counts were converted to mass by multiplying the fractional volume percent in each size category by the total mass of the <4\u03c6 fraction determined during wet sieving.", "distribution": [{"@type": "dcat:Distribution", "description": "ESRI shapefile (.shp) format with CSDGM-compliant metadata", "downloadURL": "https://irma.nps.gov/DataStore/DownloadFile/647441?Reference=2278792", "format": "zip", "mediaType": "application/zip", "title": "ground_truth_locations_.zip"}], "identifier": "http://datainventory.doi.gov/id/dataset/NPS_DataStore_2278792", "issued": "2020-02-10T00:00:00Z", "keyword": ["Benthic Ecology", "GATE", "Gateway National Recreation Area", "Hurricane Sandy", "HxSandy", "NCBN", "New Jersey", "Northeast Coastal and Barrier Network", "Sandy Hook", "Seafloor", "Seafloor Mapping", "Sediment", "Sidescan Sonar", "bathymetry", "benthic habitat", "benthic habitat mapping", "marine Geology", "submerged habitat", "submerged habitat mapping"], "landingPage": "https://irma.nps.gov/DataStore/Reference/Profile/2278792", "modified": "2020-02-10T00:00:00Z", "programCode": ["010:118", "010:119"], "publisher": {"@type": "org:Organization", "name": "National Park Service"}, "spatial": "-74.14016,40.3950768,-73.77641,40.65834", "temporal": "2014-01-01/2015-01-01", "theme": ["geospatial"], "title": "Ground-truth sampling locations, 2014-2015, Gateway National Recreation Area"}