Lake microbial communities are resilient after a whole-ecosystem disturbance.
Lake microbial communities are resilient after a whole-ecosystem disturbance.
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DOI：
10.1038/ismej.2012.56
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发表时间：
2012-12
期刊：
影响因子：
--
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中科院分区：
文献类型：
--
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干扰是生态系统中强大的结构化力量。要问环境微生物群落是否有能力恢复后，一个大的干扰事件，我们进行了整个生态系统的操作，在此期间，我们施加了强烈的干扰淡水微生物群落人工混合在夏季热分层高峰期的温带湖泊。我们采用环境传感器和水化学分析来评估湖泊的物理和化学响应，条形码16S核糖体RNA基因焦磷酸测序和自动核糖体基因间间隔区分析（ARISA）来评估细菌群落的响应。人工混合在混合结束后的七周内将平均湖水温度从14 °C提高到20 °C，并将微生物暴露在非常不同的环境条件下，包括增加的下层氧和增加的上层二氧化碳浓度。虽然整个生态系统的条件仍然改变（从6到20 °C的低层温度升高），细菌群落恢复到其操作前的状态，一些环境条件，如氧气浓度，恢复。恢复到干扰前的社区组成和多样性，观察7（上层）和11（下层）天后混合。我们的研究结果表明，一些微生物群落有能力恢复后，一个重大的干扰。
Disturbances act as powerful structuring forces on ecosystems. To ask whether environmental microbial communities have capacity to recover after a large disturbance event, we conducted a whole-ecosystem manipulation, during which we imposed an intense disturbance on freshwater microbial communities by artificially mixing a temperate lake during peak summer thermal stratification. We employed environmental sensors and water chemistry analyses to evaluate the physical and chemical responses of the lake, and bar-coded 16S ribosomal RNA gene pyrosequencing and automated ribosomal intergenic spacer analysis (ARISA) to assess the bacterial community responses. The artificial mixing increased mean lake temperature from 14 to 20 °C for seven weeks after mixing ended, and exposed the microorganisms to very different environmental conditions, including increased hypolimnion oxygen and increased epilimnion carbon dioxide concentrations. Though overall ecosystem conditions remained altered (with hypolimnion temperatures elevated from 6 to 20 °C), bacterial communities returned to their pre-manipulation state as some environmental conditions, such as oxygen concentration, recovered. Recovery to pre-disturbance community composition and diversity was observed within 7 (epilimnion) and 11 (hypolimnion) days after mixing. Our results suggest that some microbial communities have capacity to recover after a major disturbance.
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DOI：
10.1073/pnas.0807920105
发表时间：
2008-11-18
影响因子：
11.1
作者：
Fierer, Noah;Hamady, Micah;Knight, Rob
通讯作者：
Knight, Rob
影响因子：
5.9
作者：
FAITH, DP
通讯作者：
FAITH, DP
影响因子：
8.8
作者：
Carpenter, SR;Brock, WA
通讯作者：
Brock, WA
影响因子：
3.7
作者：
Hahn MW;Scheuerl T;Jezberová J;Koll U;Jezbera J;Šimek K;Vannini C;Petroni G;Wu QL
通讯作者：
Wu QL
影响因子：
11
作者：
Andersson, Anders F.;Riemann, Lasse;Bertilsson, Stefan
通讯作者：
Bertilsson, Stefan