Field parameterization and experimental test of the neutral theory of biodiversity

J. Timothy Wootton ()
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J. Timothy Wootton: The University of Chicago

Nature, 2005, vol. 433, issue 7023, 309-312

Abstract: Abstract Ecologists would like to explain general patterns observed across multi-species communities, such as species–area1 and abundance–frequency relationships1,2,3,4, in terms of the fundamental processes of birth, death and migration underlying the dynamics of all constituent species. The unified neutral theory of biodiversity5,6 and related theories7,8 based on these fundamental population processes have successfully recreated general species-abundance patterns without accounting for either the variation among species and individuals or resource-releasing processes such as predation and disturbance, long emphasized in ecological theory9,10,11,12,13,14. If ecological communities can be described adequately without estimating variation in species and their interactions15, our understanding of ecological community organization and the predicted consequences of reduced biodiversity and environmental change would shift markedly. Here, I introduce a strong method to test the neutral theory that combines field parameterization of the underlying population dynamics with a field experiment, and apply it to a rocky intertidal community. Although the observed abundance–frequency distribution of the system follows that predicted by the neutral theory, the neutral theory predicts poorly the field experimental results, indicating an essential role for variation in species interactions.

Date: 2005
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DOI: 10.1038/nature03211

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