Using Tiered Assessments to Focus Land Use Plans and Management Investments on the Highest Priorities

摘要

As broad-scale cumulative effects become increasingly evident across certain landscapes,science points to the need for broader understanding of ecosystem processes,functions,and interrelationships upon which to base our management strategies.The resultant shift to ecosystem-based management has led to landscape assessments much larger in geographic scope than traditional planning efforts.Broad-scale assessments not only provide context for establishing relative priorities within large geographic areas but also provide for stepping down their science findings through finer-scaled assessments that inform equivalent levels of planning and decision making.A systematic step-down process,such as one that was formalized for an innovative regional ecosystem project,allows managers to put local needs into broader perspective,ensuring more efficient investment of limited funding and personnel.This article provides a novel overview of the benefits of a step-down analysis and decision-making approach,describing a tiered assessment strategy linked to existing federal land use planning and decision hierarchies.Two particular assessment tools are summarized-one for mid-scale,or subbasin,assessments(400,000 to 1,000,000 hectares)and one for fine-scale,or watershed,assessments(5,000 to 50,000 hectares)-followed by an example of the use of tiered assessments to focus subsequent management attention.