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Food selection by herbivores and neighbourhood effects in the evolution of plant defences
Stockholm University, Faculty of Science, Department of Zoology.ORCID iD: 0000-0002-8103-1591
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2012 (English)In: Annales Zoologici Fennici, ISSN 0003-455X, Vol. 49, no 1-2, 45-57 p.Article in journal (Refereed) Published
Abstract [en]

A number of studies have reported how neighbouring plants may influence herbivory on palatable or unpalatable plants. Such neighbourhood effects can have important evolutionary consequences as they may either promote the evolutionary stability of plant defences or, alternatively, select against the fixation of plant defences and instead promote a stable polymorphism of palatable and unpalatable plants. These consequences depend on whether the difference in herbivore damage between unpalatable and palatable plants is smaller or, alternatively, greater when the neighbours are unpalatable instead of palatable. Such relations can arise when the neighbourhood effects are non-parallel among palatable and unpalatable plants. We outline two basic situations of non-parallel neighbourhood effects and illustrate how they can come about. A detailed dissection of these interactions reveals that there are several qualitatively distinct mechanisms that promote either evolutionary stability of plant defences or alternatively polymorphism. Our classification of mechanisms can be used to clarify and explain observations obtained in the field of plant herbivore interactions and predator prey interactions, both at the population and the community level.

Place, publisher, year, edition, pages
2012. Vol. 49, no 1-2, 45-57 p.
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URN: urn:nbn:se:su:diva-80279ISI: 000303355600005OAI: diva2:556542


Available from: 2012-09-25 Created: 2012-09-17 Last updated: 2014-10-13Bibliographically approved

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Bergvall, Ulrika A.Leimar, Olof
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