Quartzitic Footslopes And Terraces
Scenario model
Current ecosystem state
Select a state
Management practices/drivers
Select a transition or restoration pathway
- Transition T1A More details
- Transition T1B More details
- Restoration pathway R2A More details
- Transition T2A More details
- Restoration pathway R3A More details
- Restoration pathway R3B More details
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No transition or restoration pathway between the selected states has been described
Target ecosystem state
Select a state
Description
The reference state is a combination of several vegetation communities within the Central Appalachian Dry Oak-Pine Forest, and the Northeastern Interior Dry-Mesic Oak Forest as defined by NatureServe (NatureServe 2009). These forests are mostly closed-canopy but can include patches of more open woodlands and grasslands. The coarse, acidic, well drained soils, will host a variable mixture of dry-site oak and pine species. Heath shrubs are common in the understory. The reference communities listed below have been documented on this or similar ecological sites and are associated with the Northern Blue Ridge. Due to the heterogeneity and the broadness of this provisional ecological unit, they are not intended to cover every situation or the full range of conditions and species for this site. There are no transition pathways designated between the two communities in the reference state because the differences in vegetation are more controlled by landscape position than management or disturbance.
Submodel
Submodel
Mechanism
Logging, but no agricultural conversion. Trees are allowed to stump sprout, soil is minimally disturbed, seed bank remains. Fire suppression allows fire sensitive species like tuliptree and red maple to out compete oak seedlings in the understory. Proximity to more highly disturbed areas provides source of nonnative invasive species to gain a foothold in the understory.
Mechanism
Logging followed by agricultural or settlement conversion, followed by abandonment. Soil surface is disturbed by tillage or clearing of tree stumps and vegetation. Field is then abandoned. If surrounding forests are still intact, they can provide native seed sources. If surrounding areas are developed or in agriculture, then nonnative species may become dominant.
Mechanism
Control of understory to allow oak seedling recruitment. Prescribed fire will further advance the growth of oaks over fire sensitive species. Control of nonnative invasive species to allow regrowth of native species.
Mechanism
Logging followed by agricultural or settlement conversion, followed by abandonment. Soil surface is disturbed by tillage or clearing of tree stumps and vegetation. Field is then abandoned. If surrounding forests are still intact, they can provide native seed sources. If surrounding areas are developed or in agriculture, then nonnative species may become dominant.
Mechanism
Return to the reference or post logged minimally managed state may require a very long term series of costly management options and stages. Many species may need to be planted or seeded to restore the system. If using acorns, direct seeding must be done fairly heavily. Herbivory can be a problem as well as competition from faster growing species. Depending on the existing seed bank and the proximity of a mature forest from which to recruit seeds, ruderal forests may regain a mixed forest stand. Nevertheless, sites that have been cleared and tilled have significant soil disturbance which may include compaction, erosion, loss of native soil structure, loss of soil organic matter, disruption of soil microorganisms, all which affect the soil’s nutrient availability and water holding capacity (Duiker and Myers, 2005). These characteristics favor recolonization by plant species that have wind dispersed seeds (verses those that propagate through underground roots called rhizomes, or which have heavy seeds that stay near the parent tree), are shade intolerant, have rapid to moderate growth rates, and drought tolerance. These communities are distinctly different from the reference forest state (Dyer, 2010).
Mechanism
Return to the reference or post logged minimally managed state may require a very long term series of costly management options and stages. Many species may need to be planted or seeded to restore the system. If using acorns, direct seeding must be done fairly heavily. Herbivory can be a problem as well as competition from faster growing species. Depending on the existing seed bank and the proximity of a mature forest from which to recruit seeds, ruderal forests may regain a mixed forest stand. Nevertheless, sites that have been cleared and tilled have significant soil disturbance which may include compaction, erosion, loss of native soil structure, loss of soil organic matter, disruption of soil microorganisms, all which affect the soil’s nutrient availability and water holding capacity (Duiker and Myers, 2005). These characteristics favor recolonization by plant species that have wind dispersed seeds (verses those that propagate through underground roots called rhizomes, or which have heavy seeds that stay near the parent tree), are shade intolerant, have rapid to moderate growth rates, and drought tolerance. These communities are distinctly different from the reference forest state (Dyer, 2010).
Model keys
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Ecological sites
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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.