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This map layer shows Omernik's Level III ecoregions, derived from a 1:7,500,000 map created by J.M. Omernik in 1987 and from refinements of Omernik's framework that were made for other projects. Ecoregions describe areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. Omernik's ecoregions are based on the premise that a hierarchy of ecological regions can be identified through the analysis of the patterns and the composition of both living and nonliving phenomena, such as geology, physiography, vegetation, climate, soils, land use, wildlife, and hydrology, that affect or reflect differences in ecosystem quality and integrity. All the characteristics are considered...
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This map layer is commonly called Bailey’s ecoregions and shows ecosystems of regional extent in the United States, Puerto Rico, and the U.S. Virgin Islands. Four levels of detail are included to show a hierarchy of ecosystems. The largest ecosystems are domains, which are groups of related climates and which are differentiated based on precipitation and temperature. Divisions represent the climates within domains and are differentiated based on precipitation levels and patterns as well as temperature. Divisions are subdivided into provinces, which are differentiated based on vegetation or other natural land covers. The finest level of detail is described by subregions, called sections, which are subdivisions of...
The Northern Colorado Plateau Network (NCPN) is one of 32 National Park Service (NPS) inventory and monitoring networks nationwide that are implementing vital signs monitoring in order to assess the condition of park ecosystems and develop a stronger scientific basis for stewardship and management of natural resources across the National Park System. The network approach facilitates collaboration and information sharing, and will provide parks with a minimum infrastructure for initiating natural resource monitoring that can be built upon in the future. The NCPN consists of 16 parks with diverse cultural and natural resources distributed across four states and three physiographic regions. Ecosystems include desert...


    map background search result map search result map Omernik's Level III Ecoregions of the Continental United States Bailey’s Ecoregions and Subregions of the United States, Puerto Rico, and the U.S. Virgin Islands Bailey’s Ecoregions and Subregions of the United States, Puerto Rico, and the U.S. Virgin Islands Omernik's Level III Ecoregions of the Continental United States