竞争性物种相互作用限制了细菌土壤群落中的非生物适应性。
Competitive species interactions constrain abiotic adaptation in a bacterial soil community.
作者信息
Hall James P J, Harrison Ellie, Brockhurst Michael A
机构信息
Department of Animal and Plant Sciences University of Sheffield Western Bank Sheffield S10 2TN United Kingdom.
Department of Biology University of York Wentworth Way York YO10 5DD United Kingdom.
出版信息
Evol Lett. 2018 Sep 25;2(6):580-589. doi: 10.1002/evl3.83. eCollection 2018 Dec.
Studies of abiotic adaptation often consider single species in isolation, yet natural communities contain many coexisting species which could limit or promote abiotic adaptation. Here we show, using soil bacterial communities, that evolving in the presence of a competitor constrained abiotic adaptation. Specifically, evolved alone was fitter than evolved alongside , when was absent. Genome analyses indicated this was due to mutation of the acetate scavenger , which occurred exclusively, and almost universally, in single-species-evolved clones. disruption was associated with increased growth in soil compared with wild-type , but this benefit was abolished when was present, suggesting a role for carbon scavenging transporters in species interactions, possibly through nutrient competition. Our results show that competitive species interactions can limit the evolutionary response to abiotic selection, because the fitness benefits of abiotic adaptive mutations were negated in more complex communities.
对非生物适应性的研究通常孤立地考虑单一物种，然而自然群落包含许多共存物种，这些物种可能会限制或促进非生物适应性。在这里，我们利用土壤细菌群落表明，在有竞争者存在的情况下进化会限制非生物适应性。具体而言，当不存在[物种名称未明确，用 表示]时，单独进化的[物种名称未明确，用 表示]比与[物种名称未明确，用 表示]一起进化的更具适应性。基因组分析表明，这是由于醋酸盐清除剂[基因名称未明确，用 表示]的突变，这种突变仅在单物种进化的克隆中出现，而且几乎普遍存在。与野生型[物种名称未明确，用 表示]相比，[基因名称未明确，用 表示]的破坏与土壤中生长增加有关，但当[物种名称未明确，用 表示]存在时，这种益处就消失了，这表明碳清除转运蛋白在物种相互作用中可能发挥作用，可能是通过营养竞争。我们的结果表明，竞争性物种相互作用会限制对非生物选择的进化反应，因为在更复杂的群落中，非生物适应性突变的适应性益处被抵消了。
Zotero 插件