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THE MID-LATITUDE BIODIVERSITY RIDGE IN TERRESTRIAL CAVE FAUNA
Citation:
CULVER, D. C., J. J. DEHARVENG, A. BEDOS, J. J. LEWIS, M. MADDEN, J. R. REDDELL, B. SKET, P. TRONTEJIL, AND D. WHITE. THE MID-LATITUDE BIODIVERSITY RIDGE IN TERRESTRIAL CAVE FAUNA. ECOGRAPHY. Blackwell Publishing, Malden, MA, 29:120-128, (2006).
Impact/Purpose:
To utilize records of obligate cave-dwelling terrestrial invertebrates for biogeographic analysis
Description:
The world's obligate cave-dwelling fauna holds considerable promise for biogeographic analysis because it represents a large number of independent evolutionary experiments in isolation in caves and adaptation to subterranean life. We focus on seven north temperate regions of at least 2000 km2, utilizing more than 4300 records of obligate cave-dwelling terrestrial invertebrates. In North America, highest diversity was found in northeast Alabama while in Europe highest diversity was found in Ariege, France, and in southeast Slovenia. Based on these regions as well as more qualitative data from 16 other regions, we hypothesize that a ridge (ca 428 degrees-46 degrees in Europe and 34 degrees in North America) of high biodiversity occurs in temperate areas of high productivity and cave density. This may reflect a strong dependence of cave communities on long term surface productivity (as reflected in actual evapotranspiration), because the subterranean fauna relies almost entirely on resources produced outside caves. This dependence may explain the unique biodiversity pattern of terrestrial cave invertebrates.