Filters: Tags: Ecosystem (X) > partyWithName: U.S. EPA Office of Research & Development (ORD) - National Health and Environmental Effects Research Laboratory (NHEERL) (X)

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Level IV Ecoregions of the Conterminous United States Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. They are designed to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. These general purpose regions are critical for structuring and implementing ecosystem management strategies across federal agencies, state agencies, and nongovernment organizations that are responsible for different types of resources within the same geographical areas. The approach used to compile this map is based on the premise that ecological regions can be identified through the analysis of patterns of biotic and abiotic phenomena, including... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Biology, Conservation, Ecology, Ecosystem, Land, All tags... Natural Resources, United States, biota, boundaries, environment, location, Fewer tags SRLCC Level III Ecoregions (Omernik) There are 3 downloadable products in this item. The map package contains the footprint of the Southern Rockies Landscape Conservation Cooperative, showing level III ecoregions as defined by James Omernik (see metadata for citations). From metadata: "Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. They are designed to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. A Roman numeral hierarchical scheme has been adopted for different levels for ecological regions." Level I is the coursest division and level IV is the finest. The GIF file shows the SRLCC footprint... Categories: Data; Types: ArcGIS Map Package; Tags: Biology, Conservation, Ecology, Ecosystem, Land, All tags... Natural Resources, Fewer tags SRLCC Level IV Ecoregions (Omernik) The footprint of the Southern Rockies Landscape Conservation Cooperative, showing level IV ecoregions, as defined by James Omernik (see metadata for citations). The Excel table shows each ecoregion's area (in square meters and acres) and its percent of the total area. From metadata: "Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. They are designed to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. A Roman numeral hierarchical scheme has been adopted for different levels for ecological regions." Level I is the coursest division and level IV is the finest. ... Categories: Data; Types: ArcGIS Map Package; Tags: Biology, Conservation, Ecology, Ecosystem, Environment, All tags... Land, Natural Resources, Fewer tags