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Herbivores mediate different competitive and facilitative responses of native and invader populations of Brassica nigra

Herbivores mediate different competitive and facilitative responses of native and invader populations of Brassica nigra

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ODUOR, Ayub M. O., Sharon Y. STRAUSS, Yedra GARCIA, Modesto Berbel CASCALES, Jose M. GOMEZ, 2013. Herbivores mediate different competitive and facilitative responses of native and invader populations of Brassica nigra. In: Ecology. 94(10), pp. 2288-2298. ISSN 0012-9658. eISSN 1939-9170. Available under: doi: 10.1890/12-2021.1

@article{Oduor2013Herbi-25630, title={Herbivores mediate different competitive and facilitative responses of native and invader populations of Brassica nigra}, year={2013}, doi={10.1890/12-2021.1}, number={10}, volume={94}, issn={0012-9658}, journal={Ecology}, pages={2288--2298}, author={Oduor, Ayub M. O. and Strauss, Sharon Y. and Garcia, Yedra and Cascales, Modesto Berbel and Gomez, Jose M.} }

Herbivores mediate different competitive and facilitative responses of native and invader populations of Brassica nigra Ecology ; 94 (2013), 10. - S. 2288–2298 deposit-license Cascales, Modesto Berbel Oduor, Ayub M. O. Differences in plant and herbivore community assemblages between exotic and<br />native ranges may select for different levels of plant traits in invasive and native populations of plant species. Little is currently known of how herbivores may mediate competitive and facilitative interactions between invasive and native populations of plant species and their plant neighbors. Here, we conducted a common-garden field experiment to test whether invasive and native populations of Brassica nigra differ in phenotypic expressions of growth (biomass and plant height) and reproductive (seed yield) traits under different plant neighbor treatments and ambient vs. reduced level of insect herbivore damage on the B. nigra plants. We found significant interactive effects of plant neighbor treatments, level of insect herbivore damage on B. nigra plants, and invasive status of B. nigra on the phenotypic trait expressions.<br />Plant neighbor treatments had minimal effects on phenotypic trait expressions by invasive populations of B. nigra under either level of insect herbivore damage. In contrast, for native populations of B. nigra, ambient level of insect herbivore damage resulted in plant neighbors facilitating expression of the traits above, while reduced damage resulted in plant neighbors competitively suppressing trait expression. Our results suggest that insect herbivores and plant neighbors interactively shape expression of plant traits in native and exotic ranges of invasive plants. Such interactions could potentially lead to different selection pressures on traits that determine antiherbivore defenses and plant–plant interactions. Strauss, Sharon Y. 2013 eng 2014-01-15T10:43:35Z Gomez, Jose M. Strauss, Sharon Y. Gomez, Jose M. Cascales, Modesto Berbel 2014-01-15T10:43:35Z Garcia, Yedra Garcia, Yedra Oduor, Ayub M. O.

Dateiabrufe seit 01.10.2014 (Informationen über die Zugriffsstatistik)

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