A Theory of Diversity Equilibrium and Morphological Evolution

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Science  20 Apr 1979:
Vol. 204, Issue 4390, pp. 335-336
DOI: 10.1126/science.204.4390.335


If the world can only support a finite amount of biomass, species might be added over time, with a decrease in population size of an average species. Population sizes of species will decrease to the extent that stochastic events eliminate species as fast as others appear, yielding an equilibrium. A resource diversity control of niche subdivision is therefore not needed to generate an equilibrium number of species. Morphological evolution may decelerate over time for similar reasons.