Closed Depression
Scenario model
Current ecosystem state
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Management practices/drivers
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-
Transition T1A
Excessive grazing.
More details
Lack of fire. -
No transition or restoration pathway between the selected states has been described
Target ecosystem state
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Description
The Reference State for the Closed Depression site within MLRA 67B exhibits four distinct plant community phases. These plant community phases are a reflection of the natural variability and grazing management affecting the ecological functioning of the site. It is diverse, stable, and productive. Litter is properly distributed with very little movement off-site and natural plant mortality is low. It is well suited to carbon sequestration, effective water cycle, wildlife use by many species, livestock use, and is aesthetically pleasing. This state is resistant to many disturbances except excessive grazing, lack of fire, mechanical disturbance, and long-term non-use.
Submodel
Description
In the Increased Bare Ground State, all perennial plants have been greatly reduced with only remnants of the most grazing tolerant species remaining. Litter levels are extremely low, and wind erosion can be a hazard due to increased bare ground. Mineral crusting caused by raindrop impact magnifies the situation by decreasing infiltration. Bare ground is a major concern. Erosion and loss of organic matter and carbon reserves are concerns. Nutrient and water cycles and energy flow are impaired.
Submodel
Model keys
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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.