Abstract

The Atlantic slope region of the southeastern US encompasses a broad geographic area from 38°N to 26°N latitude, ranging from central Virginia to eastern Florida. The southeastern Atlantic slope contains sixteen major rivers. They contain the York River on the northernmost border to rivers on the eastern coast of Florida. There are three freshwater ecoregions within the southeastern Atlantic slope region, divided primarily as a function of latitude and drainage basin. The rivers show great variations in their geomorphology, hydrology, chemistry, and biology. The large rivers originating in the mountains offer the greatest change in aquatic biota because each of them begins as high-gradient systems and end as low-gradient systems, during which they traverse substantially different geological formations and substrata. Although precipitation is relatively uniform throughout the region, natural discharge regimes are strongly seasonal. Rivers of the southeastern Atlantic slope have a high degree of biological distinctiveness. This chapter discusses five major rivers that together cover a considerable range in natural diversity and human impacts: James, Cape Fear, Savannah, Ogeechee, and St. Johns.

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