Little evidence for release from herbivores as a driver of plant invasiveness from a multi-species herbivore-removal experiment

Dawson, Wayne; Bottini, Annamaria; Fischer, Markus; van Kleunen, Mark; Knop, Eva (2014). Little evidence for release from herbivores as a driver of plant invasiveness from a multi-species herbivore-removal experiment. Oikos, 123(12), pp. 1509-1518. Blackwell 10.1111/oik.01485

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Enemy release is frequently posed as a main driver of invasiveness of alien species. However, an experimental multi-species test examining performance and herbivory of invasive alien, non-invasive alien and native plant species in the presence and absence of natural enemies is lacking. In a common garden experiment in Switzerland, we manipulated exposure of seven alien invasive, eight alien non-invasive and fourteen native species from six taxonomic groups to natural enemies (invertebrate herbivores), by applying a pesticide treatment under two different nutrient levels. We assessed biomass production, herbivore damage and the major herbivore taxa on plants. Across all species, plants gained significantly greater biomass under pesticide treatment. However, invasive, non-invasive and native species did not differ in their biomass response to pesticide treatment at either nutrient level. The proportion of leaves damaged on invasive species was significantly lower compared to native species, but not when compared to non-invasive species. However, the difference was lost when plant size was accounted for. There were no differences between invasive, non-invasive and native species in herbivore abundance. Our study offers little support for invertebrate herbivore release as a driver of plant invasiveness, but suggests that future enemy release studies should account for differences in plant size among species.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant Ecology
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Dawson, Wayne; Fischer, Markus and van Kleunen, Mark

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0030-1299

Publisher:

Blackwell

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

23 Dec 2014 13:41

Last Modified:

08 Sep 2015 11:30

Publisher DOI:

10.1111/oik.01485

BORIS DOI:

10.7892/boris.61292

URI:

https://boris.unibe.ch/id/eprint/61292

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