Chapter 3 USFWS Great Spangled Fritillary
Chapter 3 USFWS Great spangled fritillary Existing Environment ■ Introduction ■ The Physical Landscape ■ The Cultural Landscape Setting and Land Use History ■ Current Climate ■ Air Quality ■ Water Quality ■ Regional Socio-Economic Setting ■ Refuge Administration ■ Special Use Permits, including Research ■ Refuge Natural Resources ■ Refuge Biological Resources ■ Refuge Visitor Services Program ■ Archealogical and Historical Resources The Physical Landscape Introduction This chapter describes the physical, biological, and social environment of the Rappahannock River Valley refuge. We provide descriptions of the physical landscape, the regional setting and its history, and the refuge setting, including its history, current administration, programs, and specifi c refuge resources. Much of what we describe below refl ects the refuge environment as it was in 2007. Since that time, we have been writing, compiling and reviewing this document. As such, some minor changes likely occurred to local conditions or refuge programs as we continued to implement under current management. However, we do not believe those changes appreciably affect what we present below. The Physical Landscape Watershed Our project area is part of the Chesapeake Bay watershed, a drainage basin of 64,000 square miles encompassing parts of the states of Delaware, Maryland, New York, Pennsylvania, Virginia, West Virginia, and the District of Columbia. The waters of that basin fl ow into the Chesapeake Bay, the nation’s largest estuary. The watershed contains an array of habitat types, including mixed hardwood forests typical of the Appalachian Mountains, grasslands and agricultural fi elds, lakes, rivers, and streams, wetlands and shallow waters, and open water in tidal rivers and the estuary. That diversity supports more than 2,700 species of plants and animals, including Service trust resources such as endangered or threatened species, migratory birds, and anadromous fi sh (www.fws.gov/chesapeakebay/ coastpgm.htm).
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