Dense Clay
Scenario model
Current ecosystem state
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Management practices/drivers
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- Transition T1A More details
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No transition or restoration pathway between the selected states has been described
Target ecosystem state
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Description
This state represents the natural range of variability that dominated the dynamics of this ecological site (ES). This state was dominated by cool-season grasses. In pre-European times, the primary disturbance mechanisms for this site in the reference condition included periods of below and above average precipitation, periodic fire, and herbivory by insects and large ungulates. Timing of fires and herbivory coupled with weather events dictated the dynamics that occurred within the natural range of variability. Cool-season species can decline and a corresponding increase in short, warm-season grasses would have occurred. Today, a similar state, the Native/Invaded State (State 2) can be found on areas that are properly managed with grazing and prescribed burning and sometimes on areas receiving occasional short periods of rest.
Submodel
Description
This state represents the more common range of variability that exists with the introduction of nonnative species. This state is dominated by cool-season grasses. It can be found on areas that are properly managed with prescribed grazing and sometimes on areas receiving occasional short periods of rest. Nonnative species such as cheatgrass, Japanese bromegrass, and Kentucky bluegrass can become dominant at times and influence the biotic and hydrologic ecological processes of the State. Taller cool-season species can decline and corresponding increase in short-statured grass will occur.
Submodel
Model keys
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Ecological sites
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.