Disturbance Increases Microbial Community Diversity and Production in Marine Sediments.
Disturbance Increases Microbial Community Diversity and Production in Marine Sediments.
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DOI：
10.3389/fmicb.2016.01950
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发表时间：
2016
影响因子：
5.2
通讯作者：
Guizien K
中科院分区：
文献类型：
--
作者：
Galand PE;Lucas S;Fagervold SK;Peru E;Pruski AM;Vétion G;Dupuy C;Guizien K
干扰强烈地影响着群落多样性的格局，但多样性-干扰关系的形状仍然是一个有争议的问题。几十年来，这个主题一直是理论生态学中感兴趣的话题，因为它对理解自然界中的生态系统服务具有实际意义。其中一个过程是沿海海洋沉积物中的微生物对有机物的再矿化，这些微生物周期性地受到沉积物-水界面上的扰动的影响。在这里，我们建立了一个实验，以检验在沿海沉积物中有机物厌氧降解过程中，干扰影响微生物多样性和功能的假说。我们发现，在实验的前3周，干扰既增加了微生物丰度所产生的微生物产量，又增加了群落活性部分的多样性。群落多样性和系统发育多样性均增加，表明干扰促进了不同生态类型微生物的共生。元基因组分析还表明，干扰增加了与有机物顺序厌氧降解相关的代谢诊断基因的相对丰度。然而，群落组成并没有受到系统的影响，而且随着时间的推移而发生变化。在自然界中，我们可以假设，影响沿海沉积物的适度风暴干扰促进了多样化和多产的群落。这些事件不仅没有改变有机物的分解，反而可能增加底物周转，并最终增加再矿化速率。
Disturbance strongly impacts patterns of community diversity, yet the shape of the diversity-disturbance relationship remains a matter of debate. The topic has been of interest in theoretical ecology for decades as it has practical implications for the understanding of ecosystem services in nature. One of these processes is the remineralization of organic matter by microorganisms in coastal marine sediments, which are periodically impacted by disturbances across the sediment-water interface. Here we set up an experiment to test the hypothesis that disturbance impacts microbial diversity and function during the anaerobic degradation of organic matter in coastal sediments. We show that during the first 3 weeks of the experiment, disturbance increased both microbial production, derived from the increase in microbial abundance, and diversity of the active fraction of the community. Both community diversity and phylogenetic diversity increased, which suggests that disturbance promoted the cohabitation of ecologically different microorganisms. Metagenome analysis also showed that disturbance increased the relative abundance of genes diagnostic of metabolism associated with the sequential anaerobic degradation of organic matter. However, community composition was not impacted in a systematic way and changed over time. In nature, we can hypothesize that moderate storm disturbances, which impact coastal sediments, promote diverse, and productive communities. These events, rather than altering the decomposition of organic matter, may increase the substrate turnover and, ultimately, remineralization rates.
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影响因子：
3
作者：
Hedges, JI;Keil, RG;Benner, R
通讯作者：
Benner, R
影响因子：
5.9
作者：
FAITH, DP
通讯作者：
FAITH, DP
影响因子：
8.8
作者：
Becker, Joachim;Eisenhauer, Nico;Jousset, Alexandre
通讯作者：
Jousset, Alexandre
DOI：
10.1016/0022-0981(73)90040-3
发表时间：
1973-01-01
影响因子：
2
作者：
BARNES H;BLACKSTOCK J
通讯作者：
BLACKSTOCK J
影响因子：
5.1
作者：
Gilbert, Jack A.;Field, Dawn;Joint, Ian
通讯作者：
Joint, Ian