US Fish and Wildlife Service Cooperative Fish and Wildlife Research Unit' College of Forestry, Wildlife, and Range Sciences University of Idaho Moscow,ID 83843, U.S.A. BLAIR CSUTI College of Forestry, Wildlife, and Range Sciences University of Idaho Moscow, ID 83843, U.S.A. J. E. ESTES Geography Remote Sensing Unit University of California Santa Barbara, CA 93106, U.S.A. H. ANDERSON Idaho Department of Water Resources Statehouse Boise, ID 83720, U.S.A. Crumpacker et al. ( 1988) presented a case for using the representation of potential natural vegetation (PNV) types (Kuchler 1964) on federal and Indian lands to identrfy unprotected natural ecosystems. We agree that a systems-levelstrategy is the most practical way to preserve biological diversity (Scott et al. 1987). The current emphasis on the recovery of endangered species and communities focuses limited conservation funding on a few of Earth's 30,000,000 species. The rate of habitat loss, especially in the tropics, has driven the extinction rate to unprecedented levels. The cost of reacting to these increasingly numerous crises already exceeds the global conservation budget. A number of authors (Ehrlich & Ehrlich 1981; Hutto et al. 1987; Scott et al. 1988; Norton 1988) have pointed out that saving groups of species in self-maintainingecosystems offers
Conservation Biology – Wiley
Published: Mar 1, 1989
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