Extinction in Subdivided Habitats

作者: JAMES F. QUINN , ALAN HASTINGS

DOI: 10.1111/J.1523-1739.1987.TB00033.X

关键词:

摘要: : The effect of the spatial structure populations on extinction rates is a central question in conservation biology, ecology, and evolution. We show that subdivision mean time to independently varying habitat patches depends upon relationship between probabilities area Models by demographic stochasticity alone predict should decrease extinction. If environmental incorporated into model, may increase Empirical species persistence times estimated from island bio-geography studies no systematic degree subdivision. However, always increases probability survival over sufficiently short interval. These results suggest ecologically relevant timescales, number independent sub-populations frequently act overall rare species. To these considerations be applied endangered species, maintaining sufficient numbers nature reserves likely crucial effective strategies. Resumen: El efecto de la estructura espacial las poblaciones en tasas extincion es una interrogante fundamental conservacion, ecologia y evolucion. Este trabajo muestra que el sobre tiempo promedio extincion, habitats fragmentados varian independientemente, depende relacion entre probabilidad extension del habitat. Los modelos basados exclusivamente demografia estocastica, predicen debe reducir extincion. Si se incorporan eventos aleatorias ambiente (medio estocastico) modelo, puede inmentar Las estimaciones empiricas persistencia especies, provenientes los estudios biogeografia islas, demuestran sistematica con grado No obstante, siempre aumenta sobrevivencia un periodo suficientemente corto. Estos resultados sugieren escalas ecologicamente pertinentes, varias subpoblaciones independientes frecuentemente producir reduccion especies raras. Sera para efectividad estrategias estas consideraciones apliquen raras peligro extinction, manteniendo numero suficiente reservas naturales.

参考文章(38)
J.F. Lynch, C.S. Robbins, R.F. Whitcomb, P.A. Opler, [Rebuttal to article by J.M. Diamond] Island biogeography and conservation: Strategy and limitations Science. ,vol. 193, pp. 1030- 1032 ,(1976)
O H Frankel, GENETIC CONSERVATION: OUR EVOLUTIONARY RESPONSIBILITY Genetics. ,vol. 78, pp. 53- 65 ,(1974) , 10.1093/GENETICS/78.1.53
Robert H. MacArthur, Edward Osborne Wilson, The Theory of Island Biogeography ,(1967)
Nira Richter-Dyn, Narendra S. Goel, On the extinction of a colonizing species Theoretical Population Biology. ,vol. 3, pp. 406- 433 ,(1972) , 10.1016/0040-5809(72)90014-7
J. M. Diamond, Avifaunal equilibria and species turnover rates on the channel islands of california. Proceedings of the National Academy of Sciences of the United States of America. ,vol. 64, pp. 57- 63 ,(1969) , 10.1073/PNAS.64.1.57
Daniel Simberloff, Lawrence G. Abele, Refuge Design and Island Biogeographic Theory: Effects of Fragmentation The American Naturalist. ,vol. 120, pp. 41- 50 ,(1982) , 10.1086/283968
Ingvar N. Nilsson, Sven G. Nilsson, Turnover of vascular plant species on small islands in lake Möckeln, South Sweden 1976–1980 Oecologia. ,vol. 53, pp. 128- 133 ,(1982) , 10.1007/BF00377147
Bruce A. Wilcox, Dennis D. Murphy, Conservation Strategy: The Effects of Fragmentation on Extinction The American Naturalist. ,vol. 125, pp. 879- 887 ,(1985) , 10.1086/284386
John Terborgh, Blair Winter, A method for siting parks and reserves with special reference to Columbia and Ecuador Biological Conservation. ,vol. 27, pp. 45- 58 ,(1983) , 10.1016/0006-3207(83)90005-8