Filters: Tags: Conterminous (X) > Types: OGC WMS Layer (X)

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Aquatic Ecoregions of the Conterminous United States Ecoregions are based on perceived patterns of a combination of causal and integrative factors including land use, land surface form, potential natural vegetation, and soils (Omernik, 1987). Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Aquatic, Conterminous, Ecoregion, Ecoregions, Omernik, All tags... Omernik's, US, USA, United States, Fewer tags WBD HU12 Pour Points derived from NHDPlus Pour points derived from NHDPlus V2.1 flow direction rasters and the NHDPlus V2.1 WBD HU12 snapshot. Three sets of pour points are provided: From (fpp) and to (tpp) points that identify the location where raster flow leaves the HU12 polygon, and a third "vector pour point" (vpp) selected "upstream" for use in detecting flow confluences near the raster pour point locations. This dataset is PROVISIONAL and SUBJECT TO REVISION. Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Hydrographically linked data, NHD, National Hydrography Dataset, North America, Point Event, All tags... Pour point, United States, conterminous, elevation, hydro linked data, inlandWaters, surface water (non-marine), watershed management, Fewer tags The Relative Impacts of Climate and Land-use Change on Conterminous United States Bird Species from 2001 to 2075 Species distribution models often use climate data to assess contemporary and/or future ranges for animal or plant species. Land use and land cover (LULC) data are important predictor variables for determining species range, yet are rarely used when modeling future distributions. In this study, maximum entropy modeling was used to construct species distribution maps for 50 North American bird species to determine relative contributions of climate and LULC for contemporary (2001) and future (2075) time periods. Results indicate species-specific response to climate and LULC variables; however, both climate and LULC variables clearly are important for modeling both contemporary and potential future species ranges.... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CONUS, CONUS, Change, Climate, Climatology, All tags... Conterminous, Conterminous United States, Ecology, FORE-SCE, Future, IPCC, Intergovernmental Panel on Climate Change, Land Cover, Land Use, Land Use Change, Lower 48, Model, Projection, Range, SDM, SRES, Scenario, Special Report on Emissions Scenarios, Species Distribution Model, USGS, USGS Science Data Catalog (SDC), United States, bird, Fewer tags Bailey's Ecoregions of the Conterminous United States This multi-tiered, broad-scale, hierarchical system of ecoregions is based on numerous environmental variables at each level. The first two tiers are based on climate, followed by climate and physiograpghy, and finally topography and soils. This data was used to provide a general description of the ecosystem geography. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Bailey, Bailey's, Division, Domain, Ecoregion, All tags... Ecoregions, Province, Section, US, USA, United States, conterminous, Fewer tags