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Frank D'Erchia

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The conventional approach to maintaining biological diversity generally has been to proceed species by species and threat by threat. We suggest that piecemeal approaches are not adequate by themselves to address the accelerating extinction crisis and, furthermore, they contribute to an unpredictable ecological and economic environment. Here, we describe a methodology called Gap Analysis, which identifies the gaps in representation of biological diversity (biodiversity) in areas managed exclusively or primarily for the long-term maintenance of populations of native species and natural ecosystems (hereinafter referred to as biodiversity management areas). Once identified, gaps are filled through new reserve acquisitions...
A program as large and complex as the WLCI requires significant coordination and management, as well as the integration of what is learned from science with the decision-making and program-evaluation processes. For the WLCI, coordination and integration are accomplished through the WLCI Coordination Team, which is composed of one member each from the USGS, BLM, FWS, Wyoming Game and Fish Department, and Wyoming Department of Agriculture. There is also a USGS member on the Science and Technical Advisory Committee. Under the direction of the WLCI Executive Committee, the Coordination Team manages the fiscal and logistical operations necessary to meet the goals and objectives of the WLCI. The Coordination Team also...
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This metadata catalog was developed to provide potential users of Environmental Management Technical Center (EMTC) spatial data with information about available spatial data and how these data files were developed. However, since new data files are continually in progress, this catalog may not contain information about some of the more recently developed spatial data files. Catalog updates will be provided on a quarterly basis. The data listed in this manual primarily cover the Long Term Resource Monitoring Program study area. The study area is contained within the floodplain of the Upper Mississippi River System (UMRS), including the Illinois River and navigable tributaries between Minneapolis, Minnesota, and Cairo,...
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The Environmental Management Technical Center hosted the first Upper Midwest Gap Analysis Workshop to initiate the coordination and implementation of Gap Analysis in the states of Minnesota, Michigan, and Wisconsin. Presently, Gap Analysis projects are being completed on a state-by-state basis, depending on level of interest and need by each state. Because Gap Analysis provides a standardized method and format, as state projects are completed the data can be edge-matched with adjacent states to reveal actual patterns of biodiversity at scales relevant to both the magnitude of present-day changes and the multiple levels of biological organization. Gap Analysis products are being used by state and local governments,...
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The Environmental Management Technical Center's (EMTC) Fiscal Year 1992 effort to develop a systemic spatial data base of land cover/land use within the Upper Mississippi River System (UMRS) has been completed. The UMRS spans eight degrees of latitude and includes the Upper Mississippi River from Minneapolis, Minnesota, to Cairo, Illinois (130 km), and the navigable reaches of the Illinois (526 km), the Kaskaskia (19 km), the Black (2 km), the St. Croix (40 km), and the Minnesota Rivers (42 km). Systemically, the aerial extent of the study area includes 1,137,035 ha (2,809,575 a) as defined by the floodplain of these river reaches. The EMTC acquired and processed 1989 Landsat Thematic Mapper (TM) satellite imagery...
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