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Climate change and invasion by intracontinental range-expanding exotic plants: the role of biotic interactions

Morriën, W.E. and Engelkes, T. and Macel, M. and Meisner, A. and Van der Putten, W.H. (2010) Climate change and invasion by intracontinental range-expanding exotic plants: the role of biotic interactions. Annals of Botany, 105, 843-848. ISSN 0305-7364.

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Official URL: http://dx.doi.org/10.1093/aob/mcq064

Abstract

Background and Aims: In this Botanical Briefing we describe how the interactions between plants and their biotic environment can change during range-expansion within a continent and how this may influence plant invasiveness. Scope: We address how mechanisms explaining intercontinental plant invasions by exotics (such as release from enemies) may also apply to climate-warming-induced range-expanding exotics within the same continent. We focus on above-ground and below-ground interactions of plants, enemies and symbionts, on plant defences, and on nutrient cycling. Conclusions: Range-expansion by plants may result in above-ground and below-ground enemy release. This enemy release can be due to the higher dispersal capacity of plants than of natural enemies. Moreover, lower-latitudinal plants can have higher defence levels than plants from temperate regions, making them better defended against herbivory. In a world that contains fewer enemies, exotic plants will experience less selection pressure to maintain high levels of defensive secondary metabolites. Range-expanders potentially affect ecosystem processes, such as nutrient cycling. These features are quite comparable with what is known of intercontinental invasive exotic plants. However, intracontinental range-expanding plants will have ongoing gene-flow between the newly established populations and the populations in the native range. This is a major difference from intercontinental invasive exotic plants, which become more severely disconnected from their source populations.

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:6412
Deposited On:01 Jul 2010 02:00
Last Modified:04 Sep 2014 10:03

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