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Yann Clough. Photo.

Yann Clough

Professor

Yann Clough. Photo.

Plant size affects mutualistic and antagonistic interactions and reproductive success across 21 Brassicaceae species

Author

  • Hella Schlinkert
  • Catrin Westphal
  • Yann Clough
  • Ingo Grass
  • Juliane Helmerichs
  • Teja Tscharntke

Summary, in English

Plant size has been hypothesized to be a major driver of biotic interactions. However, it is little understood how plant size affects plant mutualists vs. antagonists and the plant's resulting reproductive success. We established a common garden experiment covering an interspecific plant size gradient (from 10 to 130 cm height) across 21 annual Brassicaceae species, thereby standardizing features of habitat and surrounding landscape. We assessed flower-visiting pollinators and florivores (pollen beetle adults and larvae) and the resulting effects of all these flower-visiting insects on plant reproductive success. Besides flower characteristics (size, abundance, color), plant size had a generally positive effect on abundance and species richness of pollinators as well as on abundance of pollen beetle adults and larvae. Pollen beetles reduced seed number as well as thousand-seed weight, whereas pollinators increased seed number only. Overall, increasing plant size led to less thousand-seed weight but had no effect on seed number, indicating counterbalancing effects of herbivory and pollination. In conclusion, seed number of large plant species should benefit from locations with many pollinators and few herbivores and small plant species' seed number from locations with few pollinators and many herbivores.

Department/s

  • Centre for Environmental and Climate Science (CEC)
  • BECC: Biodiversity and Ecosystem services in a Changing Climate

Publishing year

2016-12-01

Language

English

Publication/Series

Ecosphere

Volume

7

Issue

12

Document type

Journal article

Publisher

Ecological Society of America

Topic

  • Ecology
  • Horticulture

Keywords

  • Bee (Apoidea)
  • Germany (city of Göttingen in lower saxony)
  • Herbivory
  • Meligethes aeneus
  • Multitrophic interaction
  • Pollen beetle
  • Pollination

Status

Published

ISBN/ISSN/Other

  • ISSN: 2150-8925