Meadow
Scenario model
Current ecosystem state
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Management practices/drivers
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- Transition T1A More details
- Transition T2A 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
Approximately 90 to 95 percent of the vegetation produced on this site comes from plants producing forage suitable for grazing or browsing. Due to the high availability of soil moisture, which results in early green up and high productivity, this site is subject to deterioration by overgrazing and trampling. Deterioration is indicated by a decrease in western wheatgrass, tufted hairgrass, brome spp., and bluegrass with an increase in mat muhly, sedges, rushes, and forbs.
Submodel
Description
The current potential state is similar in structure and function to the reference state, however invasive and non-natives species are present in all community phases. The current potential state is generally dominated by perennial grasses. Kentucky bluegrass can become a dominant in this plant community. The current potential state is less resilient than the reference state due to the presence of non-native/invasive species in the plant community. Annual herbaceous weedy plants have increased, but occur in small patches. Invasive species present can include knapweeds, Canada thistle, and curly dock.
Submodel
Description
This state results from seeding introduced perennial grasses. Some of the potential grass found may include the following: meadow foxtail, orchardgrass, meadow barley, timothy and smooth brome. Native perennial grasses, forbs and shrubs may be included in the seed mix. This state behave similar community dynamics to the current potential state community. Other vegetation treatments may be necessary to get to this state, they include mowing, disking, prescribed burning and other techniques which manipulate the plant community. The seeded state could persist for long periods of time with proper management. Native grasses and forbs may reestablish over time from nearby seed sources.
Submodel
Mechanism
The native understory in the reference state has been invade by non-native species. Plant may include thistles, knotweeds, dandelion, and povertyweed. Some invasive plants can become established in undisturbed and healthy native plant communities. Possible events that can cause this transition include improper domestic livestock, severe surface disturbances, fire, and/or extended droughts.
Mechanism
This transition is triggered by management decisions and actions. This transition, to a state that has been seeded with introduced perennial grasses. High energy inputs are needed for this transition. Brush will need to be removed with vegetation treatment techniques (I.e. chemical, mechanical, or fire) and introduced species that are adapted to the area and adapted to management needs have been seeded and become established. Water diversion maybe used to enhance or alter this site hydrological regime.
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.