Plant genotypic diversity increases population size of a herbivorous insect
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- Shunsuke Utsumi
- Department of General Systems Studies, University of Tokyo, Komaba, Meguro, Tokyo 153-8902, Japan
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- Yoshino Ando
- Center for Ecological Research, Kyoto University, Otsu, Shiga 520-2113, Japan
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- Timothy P. Craig
- Department of Biology, University of Minnesota Duluth, Duluth, MN 55812, USA
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- Takayuki Ohgushi
- Center for Ecological Research, Kyoto University, Otsu, Shiga 520-2113, Japan
書誌事項
- 公開日
- 2011-03-04
- 資源種別
- journal article
- 権利情報
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- https://royalsociety.org/journals/ethics-policies/data-sharing-mining/
- DOI
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- 10.1098/rspb.2011.0239
- 公開者
- The Royal Society
この論文をさがす
説明
<jats:p> It is critical to incorporate the process of population dynamics into community genetics studies to identify the mechanisms of the linkage between host plant genetics and associated communities. We studied the effects of plant genotypic diversity of tall goldenrod <jats:italic>Solidago altissima</jats:italic> on the population dynamics of the aphid <jats:italic>Uroleucon nigrotuberculatum</jats:italic> . We found genotypic variation in plant resistance to the aphid in our experiments. To determine the impact of plant genotypic diversity on aphid population dynamics, we compared aphid densities under conditions of three treatments: single-genotype plots, mixed-genotype plots and mixed-genotype-with-cages plots. In the latter treatment plants were individually caged to prevent natural enemy attack and aphid movement among plants. The synergistic effects of genotypes on population size were demonstrated by the greater aphid population size in the mixed-genotype treatment than expected from additive effects alone. Two non-exclusive hypotheses are proposed to explain this pattern. First, there is a source–sink relationship among plant genotypes: aphids move from plant genotypes where their reproduction is high to genotypes where their reproduction is low. Second, natural enemy mortality is reduced in mixed plots in a matrix of diverse plant genotypes. </jats:p>
収録刊行物
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- Proceedings of the Royal Society B: Biological Sciences
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Proceedings of the Royal Society B: Biological Sciences 278 (1721), 3108-3115, 2011-03-04
The Royal Society
