Department of Biology ( G O 16) University of California at San Diego L Jolla, CA 92093, USA. a In a review of the question of habitat subdivision for the conservation of a target species, Quinn and Hastings (Conservation Biology 1:198-208) review the SLOSS (Single Large Or Several Small) controversy and add a new view of their own. By likening reserve design to production line engineering and species to failure-prone components, they conclude that redundancy is the best policy in planning reliably for the persistence of a species. Following models of stochastic population growth developed by Leigh ( 1981), they derive a formula that specifies that the number of equally sized subdivided habitat patches be equal to the square root of the numeric carrying capacity of the target species. For example, given sufficient habitat to support 1000 individuals, it would be best to divide this habitat into 32 small patches of 32 individuals each. For black rhinos, down to about 8000 individuals, this works out to 90 reserves of 90 rhinos each. Thus, they push the old controversy of SLOSS to a more extreme dichotomy, SLOPP (Single Large Or Plentifully Patchy). While they do caution that their square
Conservation Biology – Wiley
Published: Sep 1, 1988
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