36 



J. P. Phelps and R. A. Lancia 



Table 1. Summary of herpetofauna capture data, Edisto River swamp, 

 South Carolina, 1992-1993. H' is the value of the Shannon-Weaver 

 diversity index. Values of H' with the same letter were not different 

 at 5% alpha level. 



Captures Species 

 (N) (s) 



H' 



Control drift fences 

 Clearcut drift fences 

 Edge drift fences 

 All drift fences 

 Control coverboards 

 Clearcut coverboards 

 All coverboards 



930 



16 



0.9161a 



1,172 



16 



0.9109a 



2,647 



17 



0.4738b 



4,749 



23 



0.7153c 



150 



9 



1.7077d 



129 



16 



1.7710e 



279 



19 



1.9832e 



heavy weighting toward one species, the southern toad {Bufo terrestris), 

 on the edge. Clearcut and control drift fence diversities were not 

 different at the 0.05 alpha level. Coverboard diversities were higher 

 than drift fence diversities (f = 18.5, d.f. = 333). Drift fences captured 

 more species (23) and individuals (4,749) than coverboards (19 and 

 279, respectively). The inclusion of the clearcut increased the richness 

 of the capture sample. Twenty-three species were captured on the site 

 in drift fences, but only 16 species were captured in the clearcut, and 

 16 in the control. Nineteen species were captured under coverboards, 

 but only 16 were captured in the clearcut, and nine in the control. 



Several species showed clear preferences for either the control 

 or the clearcut (Table 2). All types of salamanders were detected 

 more often in the control area. A total of 112 salamanders was captured 

 in pitfall traps and under coverboards. Ninety-two (82.1%) of these 

 were captured in the control area, with only 9 (8.0%) in the clearcut 

 (Table 2). Bronze frogs {Rana clamitans) were captured more frequently 

 in the control (104 control captures to 17 in the clearcut), while 

 southern leopard frogs (R. utricularia) were less common in the control 

 (33 drift fence captures compared to 52 on the edge and 51 in the 

 clearcut). Other frog species showing preferences were eastern narrow- 

 mouth toads {Gastrophryne carolinensis) and green treefrogs (Hyla 

 cinerea), which preferred the clearcut, and gray treefrogs (H. chrysoscelis), 

 which preferred the control. Southern toads, most of which were 

 juveniles, were captured most frequently in the edge pitfalls. Southern 

 toads were abundant in all three areas. The data on frog and toad 

 species were supported by the breeding chorus monitoring. 



