VellendDrummondTomimatsu2010

Référence

Vellend, M., Drummond, E.B.M. and Tomimatsu, H. (2010) Effects of genotype identity and diversity on the invasiveness and invasibility of plant populations. Oecologia, 162(2):371-381. (Scopus )

Résumé

Genetic diversity within species is a potentially important, but poorly studied, determinant of plant community dynamics. Here we report experiments testing the influence of genotype identity and genotypic diversity both on the invasibility of a foundation, matrix-forming species (Kentucky bluegrass, Poa pratensis), and on the invasiveness of a colonizing species (dandelion, Taraxacum officinale). Genotypes of Kentucky bluegrass in monoculture showed significant variation in productivity and resistance to dandelion invasion, but the productivity and invasion resistance of genotypic mixtures were not significantly different from those of genotypic monocultures. Indirect evidence suggested temporal shifts in the genotypic composition of mixtures. Dandelion genotypes in monoculture showed striking and significant variation in productivity and seed production, but there was no significant tendency for these variables in mixtures to deviate from null expectations based on monocultures. However, productivity and seed production of dandelion mixtures were consistently greater than those of the two least productive genotypes, and statistically indistinguishable from those of the three most productive genotypes, suggesting the possibility of greater invasiveness of genotypically diverse populations in the long run due to dominance by highly productive genotypes. In both experiments, the identity of genotypes was far more important than genetic diversity per se. © Springer-Verlag 2009.

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@ARTICLE { VellendDrummondTomimatsu2010,
    AUTHOR = { Vellend, M. and Drummond, E.B.M. and Tomimatsu, H. },
    TITLE = { Effects of genotype identity and diversity on the invasiveness and invasibility of plant populations },
    JOURNAL = { Oecologia },
    YEAR = { 2010 },
    VOLUME = { 162 },
    PAGES = { 371-381 },
    NUMBER = { 2 },
    ABSTRACT = { Genetic diversity within species is a potentially important, but poorly studied, determinant of plant community dynamics. Here we report experiments testing the influence of genotype identity and genotypic diversity both on the invasibility of a foundation, matrix-forming species (Kentucky bluegrass, Poa pratensis), and on the invasiveness of a colonizing species (dandelion, Taraxacum officinale). Genotypes of Kentucky bluegrass in monoculture showed significant variation in productivity and resistance to dandelion invasion, but the productivity and invasion resistance of genotypic mixtures were not significantly different from those of genotypic monocultures. Indirect evidence suggested temporal shifts in the genotypic composition of mixtures. Dandelion genotypes in monoculture showed striking and significant variation in productivity and seed production, but there was no significant tendency for these variables in mixtures to deviate from null expectations based on monocultures. However, productivity and seed production of dandelion mixtures were consistently greater than those of the two least productive genotypes, and statistically indistinguishable from those of the three most productive genotypes, suggesting the possibility of greater invasiveness of genotypically diverse populations in the long run due to dominance by highly productive genotypes. In both experiments, the identity of genotypes was far more important than genetic diversity per se. © Springer-Verlag 2009. },
    COMMENT = { Cited By (since 1996): 1 Export Date: 11 March 2011 Source: Scopus CODEN: OECOB doi: 10.1007/s00442-009-1480-0 },
    ISSN = { 00298549 (ISSN) },
    KEYWORDS = { Community genetics, Competition, Genetic diversity, Invasion, Species interactions, genetic variation, genotype, invasive species, monocotyledon, monoculture, plant community, seed production, article, dandelion, genetic variability, genetics, genotype, growth, development and aging, plant seed, Poa, population dynamics, Genetic Variation, Genotype, Poa, Population Dynamics, Seeds, Taraxacum, Poa, Poa pratensis, Taraxacum officinale },
    OWNER = { Luc },
    TIMESTAMP = { 2011.03.11 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-74449084541&partnerID=40&md5=902b4a4fa3a31db6d35af1578560cdfb },
}

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