Environmental variation has stronger effects than plant genotype on competition among plant species
dc.contributor.author | Johnson, Marc T. J. | en_US |
dc.contributor.author | Zhou, Alice Y. | en_US |
dc.contributor.author | Hunter, Mark D. | en_US |
dc.date.accessioned | 2010-06-01T21:34:46Z | |
dc.date.available | 2010-06-01T21:34:46Z | |
dc.date.issued | 2008-09 | en_US |
dc.identifier.citation | Johnson, Marc T. J.; Zhou, Alice Y.; Hunter, Mark D. (2008). "Environmental variation has stronger effects than plant genotype on competition among plant species." Journal of Ecology 96(5): 947-955. <http://hdl.handle.net/2027.42/74631> | en_US |
dc.identifier.issn | 0022-0477 | en_US |
dc.identifier.issn | 1365-2745 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/74631 | |
dc.description.abstract | 1. Competition is a key factor affecting the performance and co-existence of species. Most ecological research on competition treats species’ populations as phenotypically homogenous. However, plant populations typically contain genetic variation for multiple traits and have the potential to rapidly adapt to changing environments. 2. Recent theoretical and empirical research suggests that such variation and evolution may affect the ecological outcome of competitive interactions. We conducted a series of experiments to test the hypothesis whether genetic variation for competitive traits in a native plant ( Oenothera biennis ) affects the performance and diversity of competing plant species. 3. In greenhouse and field experiments, the presence of O. biennis reduced the performance and diversity of neighbouring plant species. 4. In greenhouse experiments, we detected heritable variation in O. biennis for above-ground and below-ground growth, and O. biennis varied genetically in response to competition, indicating the potential for adaptive evolution in response to selection by competitors. 5. Variation among O. biennis genotypes also affected the performance of neighbouring plants in the greenhouse, whereby genetic variation in O. biennis shoot : root ratio explained up to 41% of the variation in the performance of an exotic grass ( Bromus inermis ). 6. Despite effects of O. biennis genotype on B. inermis in the greenhouse, variable soil fertility had a much stronger effect on the grass's performance, and there were no effects of O. biennis genotype on neighbouring plants in the field. 7. Synthesis . Our results show that interspecific competition affected the biomass and diversity of plants, but heritable variation in competitive ability of O. biennis is not expected to affect short-term ecological dynamics in this system. Nevertheless, O. biennis has the potential to influence co-existence over longer timescales by adapting to competitors. | en_US |
dc.format.extent | 408543 bytes | |
dc.format.extent | 3109 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | Blackwell Publishing Ltd | en_US |
dc.rights | Journal compilation © 2008 British Ecological Society | en_US |
dc.subject.other | Character Divergence | en_US |
dc.subject.other | Co-evolution | en_US |
dc.subject.other | Co-existence | en_US |
dc.subject.other | Community Genetics | en_US |
dc.subject.other | Genetic Correlation | en_US |
dc.subject.other | Plant Ecology | en_US |
dc.subject.other | Species Diversity | en_US |
dc.title | Environmental variation has stronger effects than plant genotype on competition among plant species | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Ecology and Evolutionary Biology | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Ecology and Evolutionary Biology and Natural Resources and Environment, University of Michigan, Ann Arbor, MI 48109-1048, USA | en_US |
dc.contributor.affiliationother | Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, M5S 3B2, Canada; | en_US |
dc.contributor.affiliationother | Department of Biology, Duke University, Durham, NC 27708-0338, USA; | en_US |
dc.contributor.affiliationother | School of Medicine, University of Pennsylvania, Philadelphia, PA 19104-6087, USA; and | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/74631/1/j.1365-2745.2008.01410.x.pdf | |
dc.identifier.doi | 10.1111/j.1365-2745.2008.01410.x | en_US |
dc.identifier.source | Journal of Ecology | en_US |
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dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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