Tree Dispersion, Abundance, and Diversity in a Tropical Dry Forest

  • Stephen P. Hubbell
    Associate professor in the Department of Zoology, and in the Program in Ecology and Evolutionary Biology, University of Iowa, Iowa City 52242

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タイトル別名
  • That tropical trees are clumped, not spaced, alters conceptions of the organization and dynamics.

抄録

<jats:p>Patterns of tree abundance and dispersion in a tropical deciduous (dry) forest are summarized. The generalization that tropical trees have spaced adults did not hold. All species were either clumped or randomly dispersed, with rare species more clumped than common species. Breeding system was unrelated to species abundance or dispersion, but clumping was related to mode of seed dispersal. Juvenile densities decreased approximately exponentially away from adults. Rare species gave evidence of poor reproductive performance compared with their performance when common in nearby forests. Patterns of relative species abundance in the dry forest are compared with patterns in other forests, and are explained by a simple stochastic model based on random-walk immigration and extinction set in motion by periodic community disturbance.</jats:p>

収録刊行物

  • Science

    Science 203 (4387), 1299-1309, 1979-03-30

    American Association for the Advancement of Science (AAAS)

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