MOUNTAIN BRUSH 18-22
Scenario model
Current ecosystem state
Select a state
Management practices/drivers
Select a transition or restoration pathway
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Transition T1A
From both 1.3 and 1.4 this transition develops through improper grazing management and frequent fire. This site has crossed the threshold. It is economically impractical to return this state to State 1 with accelerated practices.
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Transition T1B
This transition develops with lack of fire and improper grazing management from a juniper invaded phase of State 1. This site has crossed the threshold. It is economically impractical to return this state to State 1 with accelerated practices.
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Transition T2A
This transition is from excessive soil loss and changes in the hydrologic cycle caused by improper grazing management and lack of fire. This state crosses the threshold and retrogresses to a new site with reduced potential. It is economically impractical to return this state to State 1 with accelerated practices.
More details -
Transition T3A
This transition is from continued lack of fire or improper grazing management. This state crosses the threshold and retrogresses to a new site with reduced potential due to significant soil loss and changes in hydrology. It is economically impractical to return this state to State 1 with accelerated practices.
More details -
No transition or restoration pathway between the selected states has been described
Target ecosystem state
Select a state
Description
The Reference Plant Community (RPC) moves through many phases depending on the natural and human cause forces that impact the community over time. State 1, described later, indicates some of these phases. The RPC is Phase 1.1. This plant community is dominated by mountain big sagebrush and mountain snowberry in the overstory with mountain brome and slender wheatgrass in the understory. Subdominant understory species include Columbia needlegrass, Idaho fescue, lupine, and arrowleaf balsamroot. Other shrubs on the site are Saskatoon serviceberry, quaking aspen, bittercherry, snowbrush ceanothus, and antelope bitterbrush. The plant species composition of Phase 1.1 is listed later under “RPC Plant Species Composition”.
Submodel
Description
This state is dominated by non-native annual plants.
Submodel
Description
The Woodland state occurs when fire is excluded from the site and western juniper is not controlled and then dominates the plant community.
Submodel
Mechanism
From both 1.3 and 1.4 this transition develops through improper grazing management and frequent fire. This site has crossed the threshold. It is economically impractical to return this state to State 1 with accelerated practices.
Mechanism
This transition develops with lack of fire and improper grazing management from a juniper invaded phase of State 1. This site has crossed the threshold. It is economically impractical to return this state to State 1 with accelerated practices.
Mechanism
This transition is from excessive soil loss and changes in the hydrologic cycle caused by improper grazing management and lack of fire. This state crosses the threshold and retrogresses to a new site with reduced potential. It is economically impractical to return this state to State 1 with accelerated practices.
Mechanism
This transition is from continued lack of fire or improper grazing management. This state crosses the threshold and retrogresses to a new site with reduced potential due to significant soil loss and changes in hydrology. It is economically impractical to return this state to State 1 with accelerated practices.
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.