CSR ecological strategies and plant mating systems: outcrossing increases with competitiveness but stress-tolerance is related to mixed mating
CSR ecological strategies and plant mating systems: outcrossing increases with competitiveness but stress-tolerance is related to mixed mating
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DOI：
10.1111/oik.02328
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发表时间：
2016-09
期刊：
影响因子：
3.4
通讯作者：
F. Munoz;C. Violle;P. Cheptou
中科院分区：
文献类型：
--
作者：
F. Munoz;C. Violle;P. Cheptou
许多植物性状影响植物受精和繁殖的成功。这些特征共同代表了具有进化意义的生态综合症。然而，虽然已经提出交配系统和殖民能力之间的关联，但交配系统和物种在生态演替中的位置之间是否存在更广泛的关系尚未得到广泛研究。 Grime 的企业社会责任理论强调，生态演替可能涉及从殖民策略到竞争策略或耐压策略的变化。竞争力和压力耐受力的不同维度如何与交配系统共存尚未被考虑。我们设计了一种比较方法来评估 1996 年草本和木本物种的交配系统、生命形式和企业社会责任策略之间的联系。我们发现企业社会责任策略与交配系统密切相关。粗鲁物种（早期演替中的殖民者）大多是自交者，而更具竞争力的物种通常是异交者。另一方面，混合交配系统具有更强的生理应激耐受性。通常认为异型杂交对于除殖民者之外的大多数生活史策略都是有利的，但我们认为，在种群稀疏且传粉者稀有的压力环境中，繁殖保证可以抵消这种影响。因此，我们的结果强调，竞争和非生物胁迫并不是对交配系统进化的同等选择压力。最后，我们发现植物的寿命可以传达有关交配系统变异的额外信息，支持其在交配系统进化中的作用。这些发现鼓励进一步研究生态策略作为性状综合症的进化作用，并表明植物性状大型数据库的出现将有助于解决有关此类综合症的主要进化假设。
A number of plant traits influence the success of fertilization and reproduction in plants. Collectively these traits represent ecological syndromes that are of evolutionary significance. However, while an association between mating system and colonizing ability has been proposed, the existence of a broader relationship between mating system and a species’ position in ecological succession has not been extensively investigated. Grime’s CSR theory stresses that an ecological succession can involve changes from colonizing to either competitive or stress-tolerant strategies. How distinct dimensions of competitiveness and stress tolerance covary with mating systems has still not been considered. We designed a comparative approach to evaluate the link between mating system, life form and CSR strategies for 1996 herbaceous and woody species. We found that CSR strategies are significantly related to mating systems. Ruderal species – colonizers in early succession – were mostly selfers while more competitive species were more often outcrossers. On the other hand, greater physiological stress tolerance was associated with mixed mating systems. Outcrossing is classically expected to be advantageous for most life history strategies other than colonizers, but we suggest that reproductive assurance can counterbalance this effect in stressful environments where populations are sparse and pollinators are rare. Therefore, our results emphasize that competition and abiotic stresses are not equivalent selective pressures on the evolution of mating systems. Finally, we found plant life span to convey additional information on mating system variation, supporting its role for mating system evolution. These findings encourage further investigation of the evolutionary role of ecological strategies as syndromes of traits and suggest that the emergence of large databases of plant traits will help address the major evolutionary hypotheses on such syndromes.