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Impact of invertebrate herbivory in grasslands depends on plant species diversity

Title data

Stein, Claudia ; Unsicker, Sybille B. ; Kahmen, Ansgar ; Wagner, Markus ; Audorff, Volker ; Auge, Harald ; Prati, Daniel ; Weisser, Wolfgang W.:
Impact of invertebrate herbivory in grasslands depends on plant species diversity.
In: Ecology. Vol. 91 (2010) Issue 6 . - pp. 1639-1650.
ISSN 0012-9658
DOI: https://doi.org/10.1890/09-0600.1

Abstract in another language

Invertebrate herbivores are ubiquitous in most terrestrial ecosystems, and theory predicts that their impact on plant community biomass should depend on diversity and productivity of the associated plant communities. To elucidate general patterns in the relationship between invertebrate herbivory, plant diversity, and productivity, we carried out a long-term herbivore exclusion experiment at multiple grassland sites in a mountainous landscape of central Germany. Over a period of five years, we used above- and belowground insecticides as well as a molluscicide to manipulate invertebrate herbivory at 14 grassland sites, covering a wide range of plant species diversity (13–38 species/m2) and aboveground plant productivity (272–1125 g•m−2•yr−1), where plant species richness and productivity of the sites were not significantly correlated.Herbivore exclusion had significant effects on the plant communities: it decreased plant species richness and evenness, and it altered plant community composition. In particular, exclusion of belowground herbivores promoted grasses at the expense of herbs. In contrast to our expectation, herbivore effects on plant community biomass were not influenced by productivity. However, effect size of invertebrate herbivores was negatively correlated with plant diversity of the grasslands: the effect of herbivory on biomass tended to be negative at sites of high diversity and positive at sites of low diversity. In general, the effects of aboveground herbivores were relatively small as compared to belowground herbivores, which were important drivers of plant community composition. Our study is the first to show that variation in the effects of invertebrate herbivory on plant communities across a landscape is significantly influenced by plant species richness.This paper has been presented as the Editors' Choice in SCIENCE, Volume 329, Number 5989, Issue of 16 July 2010: "Driving Diversity Underground"

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER56839
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Biogeography
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 05 Jun 2015 06:18
Last Modified: 05 Jun 2015 06:18
URI: https://eref.uni-bayreuth.de/id/eprint/14684