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The Continuous Plankton Recorder is a device developed by Sir Alister Hardy in 1931. Since then, his effort has been standardized and continued by the Sir Alister Hardy Foundation for Ocean Science . Research and merchant ships are equiped with a planton recording device that is towed near-surface for up...MORE
The USGS Gap Analysis Program (GAP) PAD-US is the national inventory of U.S. terrestrial and marine protected areas that are dedicated to the preservation of biological diversity and to other natural, recreation and cultural uses, managed for these purposes through legal or other effective means. Lands in PAD-US are mainly...MORE
The USGS Gap Analysis Program (GAP) Land Cover Data Set includes detailed vegetation and land use patterns for the continental United States. The data set incorporates the Ecological System classification system developed by NatureServe to represent natural and semi-natural land cover. The 590 land use classes in the data set...MORE