Filters: Tags: conterminous United States (X) > Extensions: Citation (X)

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Historical Stream Fish Distribution Database for the Conterminous United States (1950-1990): IchthyMaps Fish occurrence data to support high-resolution distribution models and test various community and macroecological hypotheses have not been available at the national scale. We present IchthyMaps, a database of high-quality historical fish occurrences covering fishes of the conterminous United States. Designed on the principles of metacommunity ecology, IchthyMaps is a compilation of presence records from atlases up to 1990, at the resolution of the 1:100,000 National Hydrography Database Plus (NHDPlus) inter-confluence stream segment, readily aggregated into hierarchically coarser units (e.g. hydrologic unit code 8-digit and 12-digit watersheds). IchthyMaps contains about 606,550 presence records for 1,038 species... Categories: Data, Publication; Types: Citation; Tags: Alabama, Arizona, Arkansas, Biological Data, Biological sampling, All tags... California, Colorado, Connecticut, Conterminous United States, Deleware, District of Columbia, Ecological distribution, Florida, Freshwater fishes, Georgia, Historical data, Historical data, Idaho, Illinois, Indiana, Kansas, Kentucky, Lentic, Lotic, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, NFHP Cooperator, NHDPlusV2, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, NoVisual, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Spatial Data, Spatial distribution, Species presence, Species presence, Tennessee, Texas, USGS Science Data Catalog (SDC), United States, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, Fewer tags Forest fragmentation of the coterminous United States: assessing forest intactness through road density and spatial characteristics. Synopsis: This study attempts to build a forest fragmentation database for the conterminous United States by utilizing high-resolution NLCD data, roads, and a series of fragmentation indices that quantify forest landscape patterns. The paper outlines a methodology for assessing forest fragmentation and provides a comprehensive data set to be used as a base for further investigation at smaller scales. Conclusions: A forest fragmentation database for the conterminous United States was built to quantify forest landscape patterns nationwide. The paper outlines a methodology for assessing forest fragmentation and provides a comprehensive data set to be used as a base for further investigation at smaller scales. Thresholds/Learnings:... Categories: Publication; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Conterminous United States, Land use configuration, Landscape fragmentation, Natural cover amount, configuration, All tags... coterminous USA, forest, forest cover, forest fragmentation, fragmentation, fragmentation indices, meso-regional, national database, road density, Fewer tags