Aquisalids Herbland
Scenario model
Current ecosystem state
Select a state
Management practices/drivers
Select a transition or restoration pathway
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Transition T1A
The Reference State (1) transitions to the Weed Invaded State (2) by gradual invasion and replacement of native species by introduced plant species.
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Transition T1B
The Reference State (1) transitions to the Grazed and Browsed State (3) with the introduction of livestock forage species by either purposeful introduction or incidental spread from neighboring areas.
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Restoration pathway R2A
The Weed Invaded State (2) may be restored to the Reference State (1) by excluding all ungulates with a suitably designed fence. Weed control must be done initially and continued in the long term. Missing native plant species must then be reintroduced.
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Restoration pathway R2B
Careful grazing management to favor desired forage species, along with weed control, can restore the Weed Invaded State (2) to the Grazed and Browsed State (3).
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Restoration pathway R3A
Permanent exclusion of livestock and feral ungulates, intensive and long-term weed control, and replanting of native plant species can be applied to restore the Grazed and Browsed State (3) to a facsimile of the Reference State (1).
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Transition T3A
Grazing and browsing intensity and duration that exceeds the modest production of preferred forage species causes a transition from the Grazed and Browsed State (3) to the Weed Invaded State (2).
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No transition or restoration pathway between the selected states has been described
Target ecosystem state
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State 1
Reference State
Description
The Reference State (1) consists of one community phase. Some of this ecological site is of marginal value as grazing land. Disturbance by introduced ungulates results in replacement of native plant species by introduced species, causing a transition to the Grazed and Browsed State (3). Gradual invasion by introduced species results in a transition to the Weed Invaded State (2).
Submodel
Description
The Weed Invaded State (2) consists of one community phase. It differs from the Reference State (1) by containing few to no native plant species because invasion by introduced plant species. It contains few species that are valuable as livestock forage.
Submodel
Mechanism
The Reference State (1) transitions to the Weed Invaded State (2) by gradual invasion and replacement of native species by introduced plant species.
Mechanism
The Reference State (1) transitions to the Grazed and Browsed State (3) with the introduction of livestock forage species by either purposeful introduction or incidental spread from neighboring areas.
Mechanism
The Weed Invaded State (2) may be restored to the Reference State (1) by excluding all ungulates with a suitably designed fence. Weed control must be done initially and continued in the long term. Missing native plant species must then be reintroduced.
Mechanism
Careful grazing management to favor desired forage species, along with weed control, can restore the Weed Invaded State (2) to the Grazed and Browsed State (3).
Mechanism
Permanent exclusion of livestock and feral ungulates, intensive and long-term weed control, and replanting of native plant species can be applied to restore the Grazed and Browsed State (3) to a facsimile of the Reference State (1).
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.