Resource Competition and Community Structure

Front Cover
Princeton University Press, Aug 21, 1982 - Science - 296 pages

One of the central questions of ecology is why there are so many different kinds of plants and animals. Here David Tilman presents a theory of how organisms compete for resources and the way their competition promotes diversity. Developing Hutchinson's suggestion that the main cause of diversity is the feeding relations of species, this book builds a mechanistic, resource-based explanation of the structure and functioning of ecological communities. In a detailed analysis of the Park Grass Experiments at the Rothamsted Experimental Station in England, the author demonstrates that the dramatic results of these 120 years of experimentation are consistent with his theory, as are observations in many other natural communities.

The consumer-resource approach of this book is applicable to both animal and plant communities, but the majority of Professor Tilman's discussion concentrates on the structure of plant communities. All theoretical arguments are developed graphically, and formal mathematics is kept to a minimum. The final chapters of the book provide some testable speculations about resources and animal communities and explore such problems as the evolution of "super species," the differences between plant and animal community diversity patterns, and the cause of plant succession.

 

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Contents

Introduction
3
What Are Resources?
11
Competition for a Single Resource
43
Competition for Two Resources
61
Spatial Heterogeneity Resource Richness and Species Diversity
98
Resource Ratios and the Species Composition of Plant Communities
139
A Comparison with Classical Competition Theory
190
Space as a Resource Disturbance and Community Structure
205
Concluding Questions and Speculations
228
Appendix
269
References
273
Author Index
291
Subject Index
294
Copyright

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