Level III and IV Ecoregions of Pennsylvania and the Blue Ridge Mountains, theCentral Appalachian Ridge and Valley, and the Central Appalachians of Virginia, West Virginia, and Maryland

摘要

Environmental resources research, assessment, monitoring, and management requireappropriate spatial structures. Ecoregion frameworks are well suited to these purposes. For the study, ecoregion maps were compiled by ecological regions identified by analyzing patterns and composition of biotic and abiotic phenomena that affect or reflect differences in ecosystem quality and integrity.