Both authors contributed equally to this paper.
Niche differentiation in Mexican birds: using point occurrences to detect ecological innovation
Article first published online: 16 JUL 2003
Volume 6, Issue 8, pages 774–782, August 2003
How to Cite
Peterson, A. T. and Holt, R. D. (2003), Niche differentiation in Mexican birds: using point occurrences to detect ecological innovation. Ecology Letters, 6: 774–782. doi: 10.1046/j.1461-0248.2003.00502.x
- Issue published online: 16 JUL 2003
- Article first published online: 16 JUL 2003
- Editor, Brian Maurer Manuscript received 12 March 2003 First decision made 18 April 2003 Manuscript accepted 13 June 2003
- Genetic algorithms;
- Mexican birds;
- niche evolution;
- predictive distributional models
The development of quantitative models of species’ distributions has largely ignored the potential for intraspecific variation in species’ niche requirements. Application of such models may nevertheless provide a rich, untapped opportunity to address the basic issue of niche conservatism vs. evolution. We illustrate this potential using genetic algorithms coupled with geographical information systems, which provide a powerful and novel approach to characterizing species’ ecological niches and geographical distributions. Our example consists of several species of Mexican birds with recognized subspecies, and associated climatic and vegetation data. Our basic protocol is to develop an ecological niche model for each subspecies, and use this model to predict distributions of other subspecies. In some cases, the ecological niche model inferred for one subspecies provides an excellent descriptor of other subspecies’ ranges, whereas in other cases the prediction is rather poor. We suggest that the latter may reveal the potential existence of evolved, intraspecific niche differentiation. We discuss alternative, non-evolutionary explanations, and point out potential implications of our results for predictive models of species’ invasions.