Stress causes interspecific facilitation within a compost community,Ecology Letters

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Stress causes interspecific facilitation within a compost community
Ecology Letters ( IF 7.6 ) Pub Date : 2021-07-14 , DOI: 10.1111/ele.13847
Elze Hesse ₁ , Siobhan O'Brien _{1,

2} , Adela M Luján _{1,

3} , Dirk Sanders ₁ , Florian Bayer ₁ , Eleanor M van Veen ₄ , Dave J Hodgson ₅ , Angus Buckling ₁

Affiliation

Ecological theory predicts interactions between species to become more positive under abiotic stress, while competition should prevail in more benign environments. However, experimental tests of this stress gradient hypothesis in natural microbial communities are lacking. We test this hypothesis by measuring interactions between 10 different members of a bacterial community inhabiting potting compost in the presence or absence of toxic copper stress. We found that copper stress caused significant net changes in species interaction signs, shifting the net balance towards more positive interactions. This pattern was at least in part driven by copper-sensitive isolates – that produced relatively small amounts of metal-detoxifying siderophores – benefitting from the presence of other species that produce extracellular detoxifying agents. As well as providing support for the stress gradient hypothesis, our results highlight the importance of community-wide public goods in shaping microbial community composition.

中文翻译：

压力导致堆肥社区内的种间促进作用

生态理论预测，在非生物胁迫下，物种之间的相互作用会变得更加积极，而竞争应该在更加良性的环境中盛行。然而，缺乏对天然微生物群落中这种压力梯度假设的实验测试。我们通过在存在或不存在有毒铜胁迫的情况下测量居住在盆栽堆肥中的细菌群落的 10 个不同成员之间的相互作用来测试这一假设。我们发现铜压力导致物种相互作用迹象的显着净变化，将净平衡转向更积极的相互作用。这种模式至少部分是由铜敏感分离物驱动的——产生相对少量的金属解毒铁载体——受益于其他产生细胞外解毒剂的物种的存在。

更新日期：2021-09-09

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