Filters: Tags: Distribution (X)848 results (49ms)
Distribution and mapping of the snail Cerithideopsis (Cerithidea) californica at Carpinteria Salt Marsh, California USA, June to August 2012
We collected detailed spatial data on the density and size distribution of intertidal snails as part of a broader effort to understand food webs in California estuaries. The survey area was Carpinteria Salt Marsh, California USA, which comprises 9 Ha tidal channels, 2 Ha salt flats, 17 Ha upland habitat, 6 Ha tidal pans, 52 Ha vegetated marsh, 2 Ha tidal flats. Using nearly 4,000 transects in potential snail habitat, we mapped snails throughout the estuary. Specifically, we systematically placed transects at intervals stratified within targeted habitat types: channels, pans, or marsh (or planar habitat that was mixed marsh and pan). At a quarter of the quadrats, we also estimated snail size-frequency distributions....
MooseConcentrationArea is an ESRI SDE Feature Class showing that part of the range of a species where densities are 200% higher than the surrounding area during a specific season. This information was derived from field personnel. A variety of data capture techniques were used including drawing on mylar overlays at 1:50,000 scale USGS county mapsheets and implementation of the SmartBoard Interactive Whiteboard using stand-up, real-time digitizing at various scales (Cowardin, M., M. Flenner. March 2003. Maximizing Mapping Resources. GeoWorld 16(3):32-35). Dataset was acquired from a third party distributor who obtained it from CDOW in January 2011. The authoritative data source is available on ArcGIS.com (http://www.arcgis.com/home/item.html?id=1245503b755346989c938aa250c23648)...
PronghornOverallRange is an ESRI SDE Feature Class showing Overall Range, The area which encompasses all known seasonal activity areas within the observed range of a population of pronghorn antelope. This information was derived from field personnel. A variety of data capture techniques were used including drawing on mylar overlays at 1:50,000 scale USGS county mapsheets and implementation of the SmartBoard Interactive Whiteboard using stand-up, real-time digitizing at various scales (Cowardin, M., M. Flenner. March 2003. Maximizing Mapping Resources. GeoWorld 16(3):32-35). Dataset was acquired from a third party distributor who obtained it from CDOW in January 2011. The authoritative data source is available...
GPChickenHistoricRange is an ESRI SDE Feature Class showing Colorado greater prairie chicken distribution. Maps are derived from records of lekking sites for greater prairie chickens. Leks may be classified as active, inactive or lek of unknown status. Classification is usually based on knowledge of population fluctuations and/or male attendance; leks are considered to identify important seasonal activity areas nearby. GPChickenHistoricRange is an ESRI shapefile showing areas where greater prairie chickens have been known to occur prior to 1955 (taken from Aldrich and Duvall, 1955). This information was derived from field personnel. A variety of data capture techniques were used including drawing on mylar overlays...
The source of this coverage data set is the fish biodiversity maps created for The Nature Conservancy (TNC) as part of their Hexagon Project. Professor Peter Moyle and his graduate student, Paul Randall, of the Department of Wildlife and Fisheries Conservation Biology at the University of California, Davis were hired to produce range maps for all known fish species that presently occur in California. Each coverage denotes a separate fish species (refer to the species coverage key below). The polygons are estimated to be accurate at a scale of roughly 1:1,000,000. Other California fish species distributions can be found in a gallery at: http://app.databasin.org/app/pages/galleryPage.jsp?id=099b47b7394f47b6b42764829e8a8f09
This dataset represents an archived record of annual California sea otter surveys from 1985-2014. Survey procedures involve counting animals during the "spring survey" -- generally beginning in late April or early May and usually ending in late May early June but may extend into early July, depending on weather conditions. Annual surveys are organized by survey year and within each year, three shapefiles are included: census summary of southern sea otter, extra limit counts of southern sea otter, and range extent of southern sea otter. The surveys, conducted cooperatively by scientists of the U.S. Geological Survey, California Department of Fish and Wildlife, U.S. Fish and Wildlife Service and Monterey Bay Aquarium...
Avian Influenza A Viruses of Southern China and Hong Kong: Ecological Aspects and Implications for Man.
Estimating monthly and seasonal distributions of temperature and precipitation using the new CPC long-range forecasts
Does shooting disturbance affect diving ducks wintering on large shallow lakes? A case study on Lough Neagh, Northern Ireland
Cyprinid distributions in Northeast U.S.A. lakes: Evidence of regional-scale minnow biodiversity losses
Euhrychiopsis lecontei Distribution, Abundance, and Experimental Augmentations for Eurasian Watermilfoil Control in Wisconsin Lakes
Deep-sea meiobenthos of the central Arctic Ocean : Distribution patterns and size-structure under extreme oligotrophic conditions
Characteristics of walleye pollock of the western area (Okhotsk Sea, Japan Sea northern part, Pacific waters near the southern Kuril coast)
Distribution of Aquatic Weeds in the Finger Lakes of New York State and Recommendations for their Control