Distribution of South Dakota Anurans
Distribution of South Dakota Anurans
South Dakota, a state that lies in the prairie pothole region, is bisected into two nearly equal eastern and western segments by the upper Missouri River. Despite a 45% decline in wetland numbers in eastern South Dakota, more than 930,000 wetland basins remain. While concern about amphibian population declines have produced conservation initiatives in other Midwestern states, in South Dakota such programs have not been implemented and there remains a lack of basic knowledge concerning the distribution and habitat use of South Dakota frogs, toads, and salamanders. To address this lack of data on South Dakota anurans, this chapter presents distribution maps for twelve species of frogs and toads. These maps include new records from fieldwork conducted in 1997–1998, where 1,496 wetland sites throughout all forty-four counties in eastern South Dakota were surveyed. The distribution maps were constructed using historical data from the South Dakota Natural Heritage Database. The chapter also explores how breeding anurans use habitats throughout eastern South Dakota by using occurrence rates of eleven species in seven different types of wetlands.
Keywords: South Dakota, anurans, population declines, conservation, distribution, habitat use, frogs, toads, distribution maps, wetlands
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