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1 January 2005 GEOGRAPHICAL VARIATION IN THE RATE OF EVOLUTION: EFFECT OF AVAILABLE ENERGY OR FLUCTUATING ENVIRONMENT?
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Abstract

In a recent paper, Wright et al. (2003) argue for the hypothesis that greater biologically available energy elevates the rate of molecular evolution. However, their results are also consistent with alternative hypotheses that invoke either environmentally driven variation in effective population sizes, or natural selection, or both. The available energy gradient cited by Wright et al. is linearly correlated with temperature fluctuations, and the observed rate heterogeneity could be a consequence of this environmental variability. The distribution of phylogenetic branch lengths alone is insufficient to distinguish between the hypotheses, and complementary approaches are suggested.

Samraat S. Pawar "GEOGRAPHICAL VARIATION IN THE RATE OF EVOLUTION: EFFECT OF AVAILABLE ENERGY OR FLUCTUATING ENVIRONMENT?," Evolution 59(1), (1 January 2005). https://doi.org/10.1554/04-125
Received: 23 February 2004; Accepted: 1 October 2004; Published: 1 January 2005
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