Climate change and invasion by intracontinental range-expanding exotic plants: the role of biotic interactions
Författare
Summary, in English
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. 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. 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.
Avdelning/ar
Publiceringsår
2010
Språk
Engelska
Sidor
843-848
Publikation/Tidskrift/Serie
Annals of Botany
Volym
105
Issue
6
Dokumenttyp
Artikel i tidskrift
Förlag
Oxford University Press
Ämne
- Biological Sciences
Nyckelord
- Climate change
- range expansion
- exotic plant
- plant invasion
- plant
- defence
- trophic interactions
- enemy release
- EICA
- above-ground and
- below-ground interactions
- nutrient cycling
- litter decomposition
- enemy release hypothesis
- nonnative plants
- natural enemies
- herbivores
- evolution
- responses
- litter
- decomposition
- communities
- mutualisms
Status
Published
Forskningsgrupp
- Microbial Ecology
ISBN/ISSN/Övrigt
- ISSN: 0305-7364