Population Diversity: Its Extent and Extinction

Author:

Hughes Jennifer B.1,Daily Gretchen C.1,Ehrlich Paul R.1

Affiliation:

1. Department of Biological Sciences, Stanford University, Stanford, CA 94305–5020, USA.

Abstract

Genetically distinct populations are an important component of biodiversity. This work estimates the number of populations per area of a sample of species from literature on population differentiation and the average range area of a species from a sample of distribution maps. This yields an estimate of about 220 populations per species, or 1.1 to 6.6 billion populations globally. Assuming that population extinction is a linear function of habitat loss, approximately 1800 populations per hour (16 million annually) are being destroyed in tropical forests alone.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference33 articles.

1. J. H. Lawton and R. M. May Eds. Extinction Rates (Oxford Univ. Press Oxford UK 1995)

2. E. O. Wilson The Diversity of Life (Harvard Univ. Press Cambridge MA 1992).

3. G. C. Daily Ed. Nature's Services: Societal Dependence on Natural Ecosystems (Island Press Washington DC 1997).

4. N. Myers The Primary Source (Norton New York 1984); P. R. Ehrlich and A. H. Ehrlich Ambio 21 219 (1992).

5. We necessarily assume that the number of populations per unit area and the range size of a species are independent.

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