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3 - Evolution and ecological implications of “specialized” pollinator rewards

Published online by Cambridge University Press:  05 January 2012

By
W. Scott Armbruster
Edited by
Sébastien Patiny
Sébastien Patiny
Affiliation:
Université de Mons-Hainaut, Belgium
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Summary

Introduction

The transfer of pollen between flowers by animals or abiotic agents is a critical event in the reproduction of most flowering plant species, affecting both the number and quality of offspring (seeds) produced. Most plants attract animal pollinators to their flowers by offering nectar, pollen, or edible floral parts to these mutualists. A small but significant number of angiosperm species offer other kinds of rewards, which I will call “specialized” rewards. Yet other species offer no rewards at all, instead deceiving their pollinators, eliciting visitation without any compensation whatsoever.

While the list of plants known to offer specialized pollinator rewards has been growing, we still know relatively little about the evolution of these pollinator-attraction systems or their effects on community ecology. In particular, the ecological implications of such reward systems have not been factored into thinking about pollination networks or the relationship between specialization and vulnerability to anthropogenic disturbance. This chapter reviews these issues using published data and unpublished observations to assess the evolutionary dynamics and ecological importance of pollination relationships based on specialized rewards.

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Evolution of Plant-Pollinator Relationships , pp. 44 - 67
Publisher: Cambridge University Press
Print publication year: 2011

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