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Transcript
Thursday, May 14, 2015 Issue Paper: Soils Resource Management Plans for Western Oregon Introduction: Soil quality is the capacity of a specific kind of soil to function, within natural or managed ecosystem boundaries, to sustain plant and animal productivity, maintain or enhance water and air quality, and support ecosystem health. Management practices can reduce soil quality through declines in two ecosystem properties: site organic matter and soil porosity. In this analysis, the BLM evaluated reductions in soil quality based on acres of detrimental soil disturbance. The BLM evaluated the acres of detrimental soil disturbance from several sources of management-induced changes, and the cumulative total of all sources, as a decrease in the innate ability of a soil to function and provide ecosystem services. Detrimental soil disturbance is the limit where the innate soil properties change and the inherent capacity to sustain growth of vegetation is reduced. Detrimental soil disturbance generally represents unacceptable levels of erosion, loss of organic matter, soil compaction, soil displacement, or some combination. Key Points: • • • The alternatives would increase the acreage of detrimental soil disturbance from timber harvest, road construction, and fuels treatments by 13 to 30 percent of current amounts during the first decade. Detrimental soil disturbance from OHV use would be highest under the No Action alternative and lower under all action alternatives, because none of the action alternatives would allocate any areas as open for OHV use. The BLM would be able to reduce the acreage of detrimental soil conditions from timber harvest, road construction, and fuels treatments through sound management practices that would limit initial compaction levels, remove existing or created compacted surfaces, and improve soil water and organic matter levels. The Resource Management Plans (RMP) for Western Oregon will determine how the BLM-administered lands in western Oregon will be managed to further the recovery of threatened and endangered species, to provide for clean water, to restore fire-adapted ecosystems, to produce a sustained yield of timber products, to coordinate management of lands surrounding the Coquille Forest with the Coquille Tribe, and to provide for recreation opportunities. For more information, please visit the BLM’s Resource Management Plans of western Oregon website at http://www.blm.gov/or/plans/rmpswesternoregon/index.php.