Population genetic diversity influences colonization success
Population genetic diversity influences colonization success
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DOI：
10.1111/j.1365-294x.2010.04550.x
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发表时间：
2010-03-01
影响因子：
4.9
通讯作者：
Whitney, K. D.
中科院分区：
文献类型：
--
作者：
Crawford, K. M.;Whitney, K. D.
人们已经对可能使一个物种成为成功殖民者的个体水平特征进行了大量思考。然而，这些特征已被证明是殖民成功的弱预测。在这里，我们测试是否人口水平的特点，特别是遗传多样性和人口密度，可以影响殖民化能力的短期生态时间尺度，独立的长期影响适应潜力。在实验操作的杂草草本植物拟南芥种群内，我们发现，遗传多样性的增加增加了殖民化的成功率，衡量人口水平的出苗率，生物量生产，开花时间和繁殖。加性和非加性效应有助于这些反应，表明个体基因型（取样效应）和基因型之间的积极相互作用（互补性）有助于增加殖民成功。与此相反，植物密度的操纵殖民成功没有影响。相对遗传丰富的种群殖民新栖息地的能力提高，如果是一种普遍现象，可能对预测和控制生物入侵具有重要意义。
Much thought has been given to the individual-level traits that may make a species a successful colonizer. However, these traits have proven to be weak predictors of colonization success. Here, we test whether population-level characteristics, specifically genetic diversity and population density, can influence colonization ability on a short-term ecological timescale, independent of longer-term effects on adaptive potential. Within experimentally manipulated populations of the weedy herb Arabidopsis thaliana, we found that increased genetic diversity increased colonization success measured as population-level seedling emergence rates, biomass production, flowering duration, and reproduction. Additive and non-additive effects contributed to these responses, suggesting that both individual genotypes (sampling effect) and positive interactions among genotypes (complementarity) contributed to increased colonization success. In contrast, manipulation of plant density had no effect on colonization success. The heightened ability of relatively genetically rich populations to colonize novel habitats, if a general phenomenon, may have important implications for predicting and controlling biological invasions.