G. O. Graening, Michael Slay, and Chuck Bitting. Cave Fauna of the Buffalo National River. Journal of Cave and Karst Studies, v. 68, no. 3, p. 153–163. CAVE FAUNA OF THE BUFFALO NATIONAL RIVER G. O. GRAENING The Nature Conservancy, 601 North University Avenue, Little Rock, AR 72205, USA,
[email protected] MICHAEL E. SLAY The Nature Conservancy, 601 North University Avenue, Little Rock, AR 72205, USA,
[email protected] CHUCK BITTING Buffalo National River, 402 North Walnut, Suite 136, Harrison, AR 72601, USA,
[email protected] The Buffalo National River (within Baxter, Marion, Newton, and Searcy counties, Arkansas) is completely underlain by karstic topography, and contains approximately 10% of the known caves in Arkansas. Biological inventory and assessment of 67 of the park’s subterranean habi- tats was performed from 1999 to 2006. These data were combined and analyzed with previous studies, creating a database of 2,068 total species occurrences, 301 animal taxa, and 143 total sites. Twenty species obligate to caves or ground water were found, including four new to sci- ence. The species composition was dominated by arthropods. Statistical analyses revealed that site species richness was directly proportional to cave passage length and correlated to habitat factors such as type of water resource and organics present, but not other factors, such as de- gree of public use or presence/absence of vandalism. Sites were ranked for overall biological significance using the metrics of passage length, total and obligate species richness. Fitton Cave ranked highest and is the most biologically rich cave in this National Park and second-most in all of Arkansas with 58 total and 11 obligate species.