Translator Disclaimer
1 May 2008 Phytophagous Insect–Microbe Mutualisms and Adaptive Evolutionary Diversification
Eric M. Janson, John O. Stireman, Michael S. Singer, Patrick Abbot
Author Affiliations +
Abstract

Adaptive diversification is a process intrinsically tied to species interactions. Yet, the influence of most types of interspecific interactions on adaptive evolutionary diversification remains poorly understood. In particular, the role of mutualistic interactions in shaping adaptive radiations has been largely unexplored, despite the ubiquity of mutualisms and increasing evidence of their ecological and evolutionary importance. Our aim here is to encourage empirical inquiry into the relationship between mutualism and evolutionary diversification, using herbivorous insects and their microbial mutualists as exemplars. Phytophagous insects have long been used to test theories of evolutionary diversification; moreover, the diversification of a number of phytophagous insect lineages has been linked to mutualisms with microbes. In this perspective, we examine microbial mutualist mediation of ecological opportunity and ecologically based divergent natural selection for their insect hosts. We also explore the conditions and mechanisms by which microbial mutualists may either facilitate or impede adaptive evolutionary diversification. These include effects on the availability of novel host plants or adaptive zones, modifying host-associated fitness trade-offs during host shifts, creating or reducing enemy-free space, and, overall, shaping the evolution of ecological (host plant) specialization. Although the conceptual framework presented here is built on phytophagous insect–microbe mutualisms, many of the processes and predictions are broadly applicable to other mutualisms in which host ecology is altered by mutualistic interactions.

Eric M. Janson, John O. Stireman, Michael S. Singer, and Patrick Abbot "Phytophagous Insect–Microbe Mutualisms and Adaptive Evolutionary Diversification," Evolution 62(5), 997-1012, (1 May 2008). https://doi.org/10.1111/j.1558-5646.2008.00348.x
Received: 6 April 2007; Accepted: 19 December 2007; Published: 1 May 2008
JOURNAL ARTICLE
16 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

Share
SHARE
KEYWORDS
Adaptive radiation
ecological speciation
natural enemies
plant–insect interactions
symbiosis
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top