Resource-dependent attenuation of species interactions during bacterial succession.
Resource-dependent attenuation of species interactions during bacterial succession.
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DOI：
10.1038/ismej.2016.11
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发表时间：
2016-09
期刊：
影响因子：
--
通讯作者：
Bell T
中科院分区：
文献类型：
--
作者：
Rivett DW;Scheuerl T;Culbert CT;Mombrikotb SB;Johnstone E;Barraclough TG;Bell T
细菌群落对于许多经济和生态上重要的过程至关重要。细菌群落组成在决定生态系统功能中的作用关键取决于细菌类群之间的相互作用。一些研究表明，尽管在群落中负相互作用占主导地位，但在适当的进化或生态条件下，细菌能够显示出积极的相互作用。我们感兴趣的是种间的相互作用如何随着时间的推移，在低资源供应率的自然设置。我们组装水生细菌群落的缩影和测定的生产力（呼吸和生长）和基质降解，同时跟踪社区组成。结果表明，虽然细菌群落在定植和适应新的生物和非生物因素的早期阶段表现出强烈的负相互作用，但这种拮抗作用随着时间的推移而下降，趋向于更中性的状态。这与从使用不稳定的基板在早期的继承到使用柠檬酸盐基板后来的继承，确认资源动态的关键作用，在连接种间相互作用与生态系统功能的转变。
Bacterial communities are vital for many economically and ecologically important processes. The role of bacterial community composition in determining ecosystem functioning depends critically on interactions among bacterial taxa. Several studies have shown that, despite a predominance of negative interactions in communities, bacteria are able to display positive interactions given the appropriate evolutionary or ecological conditions. We were interested in how interspecific interactions develop over time in a naturalistic setting of low resource supply rates. We assembled aquatic bacterial communities in microcosms and assayed the productivity (respiration and growth) and substrate degradation while tracking community composition. The results demonstrated that while bacterial communities displayed strongly negative interactions during the early phase of colonisation and acclimatisation to novel biotic and abiotic factors, this antagonism declined over time towards a more neutral state. This was associated with a shift from use of labile substrates in early succession to use of recalcitrant substrates later in succession, confirming a crucial role of resource dynamics in linking interspecific interactions with ecosystem functioning.