lation, chronic poverty, and fuel shortages in the Third World create unrelenting pressures to exploit all available local resources. These pressures certainly will become more overwhelming in the future.

Our urban centers can be viewed as bellwethers of our global environmental fate. Our success at meeting the challenges of protecting biological diversity in urban areas is a good measure of our commitment to protect functioning ecosystems worldwide. If we cannot act as responsible stewards in our own backyards, the long-term prospects for biological diversity in the rest of this planet are grim indeed.

REFERENCES

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Heath, J. 1981. Threatened Rhopalocera (Butterflies) in Europe. Council of Europe, Strasbourg, France. 157 pp.


Matthiae, P.E., and F.Stearns. 1981. Mammals in forest islands in southeastern Wisconsin. Pp. 55–66 in R.L.Burgess and D.M.Sharpe, eds. Forest Island Dynamics in Man-dominated Landscapes. Springer-Verlag, New York.


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Wilcox, B.A. 1984. In situ conservation of genetic resources: Determinants of minimum area requirements. Pp. 639–647 in J.A.McNeeley and K.R.Miller, eds. National Parks, Conservation, and Development: The Role of Protected Areas in Sustaining Society. Proceedings of the World Congress on National Parks, Bali, Indonesia, 11–22 October 1982. Smithsonian Institution Press, Washington, D.C.

Wilcox, B.A., and D.D.Murphy. 1985. Conservation strategy: The effects of fragmentation on extinction. Am. Nat. 125(6):879–887.



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