. The Canadian field-naturalist. Natural history. 184 The Canadian Field-Naturalist Vol. 108. Figure 3. Distribution of Emydoidea blandingii in Kejimkujik National Park, Nova Scotia. Solid circles indicate sitings of different individual turtles (n=l 19) between 1952-1991; numbers indicate the numbers of turtles observed in three areas of concentration. the species and is considered a relict from a warmer climatic period (Bleakney 1958a). Although nothing is known of the history of the species in Nova Scotia, a comparison of past and pre- sent distributions of Emydoidea blandingii elsewhere sh
. The Canadian field-naturalist. Natural history. 184 The Canadian Field-Naturalist Vol. 108. Figure 3. Distribution of Emydoidea blandingii in Kejimkujik National Park, Nova Scotia. Solid circles indicate sitings of different individual turtles (n=l 19) between 1952-1991; numbers indicate the numbers of turtles observed in three areas of concentration. the species and is considered a relict from a warmer climatic period (Bleakney 1958a). Although nothing is known of the history of the species in Nova Scotia, a comparison of past and pre- sent distributions of Emydoidea blandingii elsewhere shows a considerable change in the range of the turtle (Figure 2). Fossil specimens have been found in Kansas (Pleistocene) (Preston 1971), Nebraska (Miocene) (Hutchison 1981), Mississippi (Pleistocene) (Jackson and Kaye 1974), and Oklahoma and Missouri (late Pliocene to Pleistocene) (Preston and McCoy 1971). Archeological evidence of Blanding's exists from Ontario and Quebec (Bleakney 1958b), Maine (French 1986), Michigan (Adler 1968), Illinois, New York, Wisconsin, and Missouri (Preston and McCoy 1971). The fossil evi- dence, which occurs to the south and west of the pre- sent centre of distribution, suggests that the species moved from west to east in the geologic past. This movement may have resulted from habitat disappear- ance (Jackson and Kaye 1974), or changing climatic conditions (Preston 1971). Archeological findings that suggest subsequent extinctions have occurred in some peripheral areas. This pattern may have resulted from the use of the Atlantic Coastal Plain as a glacial refuge, with post-glacial dispersal occurring north, east, and west from this area (Bleakney 1958a). Alternatively, the plains may have served as the glacial refuge, with post-glacial dispersal occurring along a "steppe corridor" (Schmidt 1938) to the east (Preston and McCoy 1971; Porter 1972). The. Please note that these images are extracted from scanned page images that may have been d
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