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Biogeographic Kinetics: Estimation of Relaxation Times for Avifaunas of Southwest Pacific Islands

Diamond, Jared M.

Proceedings of the National Academy of Sciences - PNAS, 1972-11, Vol.69 (11), p.3199-3203 [Periódico revisado por pares]

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Título:
Biogeographic Kinetics: Estimation of Relaxation Times for Avifaunas of Southwest Pacific Islands
Autor: Diamond, Jared M.
Assuntos: Biological Sciences: Zoology ; Birds ; Endemic species ; Extinct species ; Fauna ; Land bridges ; Relaxation time ; Sea level ; Species diversity ; Species extinction ; Tropical rain forests
É parte de: Proceedings of the National Academy of Sciences - PNAS, 1972-11, Vol.69 (11), p.3199-3203
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: When species diversity S on an island is displaced from the equilibrium value by injection or removal of species, S relaxes to equilibrium by an imbalance between immigration and extinction rates. Estimates of exponential relaxation times, tr, for avifaunas of New Guinea satellite islands are calculated from analysis of four ``experiments of nature'': recolonization of exploded volcanoes, contraction in island area due to rising sea level, severing of land bridges, and disappearance of land-bridge relict species. tris in the range 3,000-18,000 years for avifaunas of islands of 50-3000 square miles (130-7800 km2), and increases with island area. Immigration coefficients decrease and extinction coefficients increase with increasing S. The results may be relevant to the design of rainforest preserves.
Editor: United States: National Academy of Sciences of the United States of America
Idioma: Inglês

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