Cargando…

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

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 of...

Descripción completa

Detalles Bibliográficos
Autores principales: Oduor, Ayub M. O., Stift, Marc, van Kleunen, Mark
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4627727/
https://www.ncbi.nlm.nih.gov/pubmed/26517125
http://dx.doi.org/10.1371/journal.pone.0141857
_version_ 1782398319752904704
author Oduor, Ayub M. O.
Stift, Marc
van Kleunen, Mark
author_facet Oduor, Ayub M. O.
Stift, Marc
van Kleunen, Mark
author_sort Oduor, Ayub M. O.
collection PubMed
description 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.
format Online
Article
Text
id pubmed-4627727
institution National Center for Biotechnology Information
language English
publishDate 2015
publisher Public Library of Science
record_format MEDLINE/PubMed
spelling pubmed-46277272015-11-06 The Interaction between Root Herbivory and Competitive Ability of Native and Invasive-Range Populations of Brassica nigra Oduor, Ayub M. O. Stift, Marc van Kleunen, Mark PLoS One Research Article 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. Public Library of Science 2015-10-30 /pmc/articles/PMC4627727/ /pubmed/26517125 http://dx.doi.org/10.1371/journal.pone.0141857 Text en © 2015 Oduor et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Oduor, Ayub M. O.
Stift, Marc
van Kleunen, Mark
The Interaction between Root Herbivory and Competitive Ability of Native and Invasive-Range Populations of Brassica nigra
title The Interaction between Root Herbivory and Competitive Ability of Native and Invasive-Range Populations of Brassica nigra
title_full The Interaction between Root Herbivory and Competitive Ability of Native and Invasive-Range Populations of Brassica nigra
title_fullStr The Interaction between Root Herbivory and Competitive Ability of Native and Invasive-Range Populations of Brassica nigra
title_full_unstemmed The Interaction between Root Herbivory and Competitive Ability of Native and Invasive-Range Populations of Brassica nigra
title_short The Interaction between Root Herbivory and Competitive Ability of Native and Invasive-Range Populations of Brassica nigra
title_sort interaction between root herbivory and competitive ability of native and invasive-range populations of brassica nigra
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4627727/
https://www.ncbi.nlm.nih.gov/pubmed/26517125
http://dx.doi.org/10.1371/journal.pone.0141857
work_keys_str_mv AT oduorayubmo theinteractionbetweenrootherbivoryandcompetitiveabilityofnativeandinvasiverangepopulationsofbrassicanigra
AT stiftmarc theinteractionbetweenrootherbivoryandcompetitiveabilityofnativeandinvasiverangepopulationsofbrassicanigra
AT vankleunenmark theinteractionbetweenrootherbivoryandcompetitiveabilityofnativeandinvasiverangepopulationsofbrassicanigra
AT oduorayubmo interactionbetweenrootherbivoryandcompetitiveabilityofnativeandinvasiverangepopulationsofbrassicanigra
AT stiftmarc interactionbetweenrootherbivoryandcompetitiveabilityofnativeandinvasiverangepopulationsofbrassicanigra
AT vankleunenmark interactionbetweenrootherbivoryandcompetitiveabilityofnativeandinvasiverangepopulationsofbrassicanigra