Limy
Scenario model
Current ecosystem state
Select a state
Management practices/drivers
Select a transition or restoration pathway
- Transition T1A More details
- Restoration pathway R2A More details
-
No transition or restoration pathway between the selected states has been described
Target ecosystem state
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Description
This state represents the most ecologically stable conditions in terms of resistance to erosion. Moreover, this state has the highest potential for productivity and plant diversity.
Submodel
Mechanism
Loss of grass cover due to overgrazing and the associated reduced competition by grasses may facilitate woody encroachment.3
Key indicators of approach to transition:
* Decrease or change in composition or distribution of grass cover, such as dominance by blue grama.
* Increase in size and frequency of bare patches.
* Increase in amount of rabbitbrush, horsebrush, or juniper/piñon seedlings.
Mechanism
Brush control is necessary to reduce the competitive influence of shrubs. Some positive results have been reported in controlling rabbitbrush with herbicides. Root plowing and other mechanical control methods that sever the plant below the sprouting zone may reduce horsebrush and rabbitbrush densities. Horsebrush and rabbitbrush are fire-adapted species and can quickly increase or occupy a site following fire. Mechanical, chemical, or a combination can be effective in reducing piñon/juniper densities. Prescribed grazing will help ensure adequate rest following brush control and will assist in the establishment and maintenance of grass cover.
Model keys
Briefcase
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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.