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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...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2015
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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 |
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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
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title_full | The Interaction between Root Herbivory and Competitive Ability of Native and Invasive-Range Populations of Brassica nigra
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title_fullStr | The Interaction between Root Herbivory and Competitive Ability of Native and Invasive-Range Populations of Brassica nigra
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title_full_unstemmed | The Interaction between Root Herbivory and Competitive Ability of Native and Invasive-Range Populations of Brassica nigra
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title_short | The Interaction between Root Herbivory and Competitive Ability of Native and Invasive-Range Populations of Brassica nigra
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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 |
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