| Genotypic diversity effects on the performance of Taraxacum officinale populations increase with time and environmental favorability. | |
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MedLine Citation:
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PMID: 22348004 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Within-population genetic diversity influences many ecological processes, but few studies have examined how environmental conditions may impact these short-term diversity effects. Over four growing seasons, we followed experimental populations of a clonal, ubiquitous weed, Taraxacum officinale, with different numbers of genotypes in relatively favorable fallow field and unfavorable mowed lawn environmental treatments. Population performance (measured as total leaf area, seed production or biomass) clearly and consistently increased with diversity, and this effect became stronger over the course of the experiment. Diversity effects were stronger, and with different underlying mechanisms, in the fallow field versus the mowed lawn. Large genotypes dominated in the fallow field driving overyielding (via positive selection effects), whereas in the mowed lawn, where performance was limited by regular disturbance, there was evidence for complementarity among genotypes (with one compact genotype in particular performing better in mixture than monoculture). Hence, we predict stronger genotypic diversity effects in environments where intense intraspecific competition enhances genotypic differences. Our four-year field experiment plus seedling establishment trials indicate that genotypic diversity effects have far-reaching and context-dependent consequences across generations. |
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Authors:
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Emily B M Drummond; Mark Vellend |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2012-02-10 |
Journal Detail:
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Title: PloS one Volume: 7 ISSN: 1932-6203 ISO Abbreviation: PLoS ONE Publication Date: 2012 |
Date Detail:
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Created Date: 2012-02-20 Completed Date: 2012-07-31 Revised Date: 2013-05-20 |
Medline Journal Info:
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Nlm Unique ID: 101285081 Medline TA: PLoS One Country: United States |
Other Details:
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Languages: eng Pagination: e30314 Citation Subset: IM |
Affiliation:
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Department of Botany, Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, Canada. ebmd@interchange.ubc.ca |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Environment* Genetic Variation* Genetics, Population Genotype Seedling Taraxacum / genetics*, growth & development |
| Comments/Corrections | |
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