English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The evolution of increased competitive ability (EICA) hypothesis predicts that escape from intense herbivore damage may enable invasive plants to evolve higher competitive ability in the invasive range. Below-ground root herbivory can have a strong impact on plant performance, and invasive plants often compete with multiple species simultaneously, but experimental approaches in which EICA predictions are tested with root herbivores and in a community setting are rare. Here, we used  Brassica nigra  plants from eight invasive- and seven native-range populations to test whether the invasive-range plants have evolved increased competitive ability when competing with  Achillea millefolium  and with a community (both with and without  A .  millefolium ). Further, we tested whether competitive interactions depend on root herbivory on  B .  nigra  by the specialist  Delia radicum . Without the community, competition with  A .  millefolium  reduced biomass of invasive- but not of native-range  B .  nigra . With the community, invasive-range  B .  nigra  suffered less than native-range  B .  nigra . Although the overall effect of root herbivory was not significant, it reduced the negative effect of the presence of the community. The community produced significantly less biomass when competing with  B .  nigra , irrespective of the range of origin, and independent of the presence of  A .  millefolium . Taken together, these results offer no clear support for the EICA hypothesis. While native-range  B .  nigra  plants appear to be better in dealing with a single competitor, the invasive-range plants appear to be better in dealing with a more realistic multi-species community. Possibly, this ability of tolerating multiple competitors simultaneously has contributed to the invasion success of  B .  nigra  in North America.

The Interaction between Root Herbivory and Competitive Ability of Native and Invasive-Range Populations of Brassica nigra