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Herptofaunal species richness responses to forest landscape structure in ArkansasAuthor(s): Craig Loehle; T. Bently Wigley; Paul A. Shipman; Stanley F. Fox; Scott Rutzmoser; Ronald E. Thill; M. Anthony Melchiors
Source: Forest Ecologyand Management 209 (2005) 293-308
Publication Series: Miscellaneous Publication
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DescriptionSpecies accumulation curves were used to study reiationships between herpetofaunal richness and habitat characteristics on four watersheds in Arkansas that differed markedly with respect to management intensity. Selected habitat characteristics were estimated for stands containing the sample points and within buffers with radii of 250. 500 m, and 1 km surrounding the sample polnts. Ricllness of all three herpetofaunal groups (amphibians, reptiles, and all herpetofauna) was greater in hardwood forests than in pine or mixed pine-hardwood. For all three groups, the youngest forest age class had the most species. For amphibians and total herpetofauna, richness declined as stand ages increased. Reptiles had the highest richness at sample points with the lowest class of stand basal area (BA), whereas amphibians were richest at points having the highest BA. In contrast to expectations, there was no effect of distance from water on richness of any taxa; however, we may have had incomplete data on the spatial dktribution of small ponds outside the sample plots because they were not recorded in the GIs data. Results for distance to roads were ambiguous. but with more separation of compared curves as more plots were sampled. a positive influence of road proximity was suggested. There was a positive effect of buffer age diversity at the 75i) m scale for all three herpetofaunal groups. but less so at scales >250 m except for amphibians, which also showed a positive cffect at the 1 km scale. The two most intensively managed watersheds had higher species richness than the two less intensively managed watersheds for reptiles, amphibians, and both groups combined. In this study landscape, where urban lnd agricultural influences were minimal. we did not observe negative impacts of forest management and associated.
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CitationLoehle, Craig; Wigley, T. Bently; Shipman, Paul A.; Fox, Stanley F.; Rutzmoser, Scott; Thill, Ronald E.; Melchiors, M. Anthony. 2005. Herptofaunal species richness responses to forest landscape structure in Arkansas. Forest Ecologyand Management 209 (2005) 293-308
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