U.S. ecological site groups
Overview
This catalog features ecosystem dynamics of the United States by ecoregion. Ecoregions are subdivided into classes known as ecological site groups, and separate models of ecosystem dynamics are developed for each class. Models are used to characterize ecosystem dynamics occurring at the site (land unit) scale, with an emphasis on natural and semi-natural ecosystems. Models may be a generalization of those developed by the Natural Resources Conservation Service and its partners for individual ecological sites.
Availability
View Summary Reports and MapsNext steps
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1
Select a Major Land Resource Area
To learn more about a particular ecological site group, first select a Major Land Resource Area using the list, map, photos, briefcase, or quick search option located on this page. -
2
Select an ecological site group
Next, select an ecological site group associated with the Major Land Resource Area of interest. Keys, descriptions, and images are available to help determine an appropriate ecological site group. -
3
Explore the ecological site group description
Finally, learn more about the selected ecological site group and its characteristic dynamics by browsing the ecological site group description and exploring alternative state and transition model formats.
Major Land Resource Area list
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Major Land Resource Area map
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Briefcase
Add ecological site groups and Major Land Resource Areas to your briefcase by clicking on the briefcase () icon wherever it occurs. Drag and drop items to reorder. Cookies are used to store briefcase items between browsing sessions. Because of this, the number of items that can be added to your briefcase is limited, and briefcase items added on one device and browser cannot be accessed from another device or browser. Users who do not wish to place cookies on their devices should not use the briefcase tool. Briefcase cookies serve no other purpose than described here and are deleted whenever browsing history is cleared.
Ecological site groups
Major Land Resource Areas
The Ecosystem Dynamics Interpretive Tool is an information system framework developed by the USDA-ARS Jornada Experimental Range, USDA Natural Resources Conservation Service, and New Mexico State University.