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2004 The Society for the Study of Evolution. All rights reserved. INTERNATIONAL JOURNAL OF ORGANIC EVOLUTION
 

Summary: 2599
2004 The Society for the Study of Evolution. All rights reserved.
EVOLUTION
INTERNATIONAL JOURNAL OF ORGANIC EVOLUTION
PUBLISHED BY
THE SOCIETY FOR THE STUDY OF EVOLUTION
Vol. 58 December 2004 No. 12
Evolution, 58(12), 2004, pp. 2599­2612
EVOLUTION OF NICHE WIDTH AND ADAPTIVE DIVERSIFICATION
MARTIN ACKERMANN1,2,3,4 AND MICHAEL DOEBELI4,5,6
1Division of Biological Sciences, University of California, San Diego, California 92093
2E-mail: MKAckerm@ucsd.edu
5Departments of Zoology and Mathematics, University of British Columbia, Vancouver, V6T1Z4 Canada
6E-mail: doebeli@zoology.ubc.ca
Abstract. Theoretical models suggest that resource competition can lead to the adaptive splitting of consumer pop-
ulations into diverging lineages, that is, to adaptive diversification. In general, diversification is likely if consumers
use only a narrow range of resources and thus have a small niche width. Here we use analytical and numerical methods
to study the consequences for diversification if the niche width itself evolves. We found that the evolutionary outcome
depends on the inherent costs or benefits of widening the niche. If widening the niche did not have costs in terms of
overall resource uptake, then the consumer evolved a niche that was wide enough for disruptive selection on the niche

  

Source: Ackermann, Martin - Institut für Integrative Biologie, Eidgenössische Technische Hochschule Zürich (ETHZ)
Doebeli, Michael - Departments of Zoology & Mathematics, University of British Columbia

 

Collections: Biology and Medicine