The importance of neutral and niche processes for bacterial community assembly differs between habitat generalists and specialists
The importance of neutral and niche processes for bacterial community assembly differs between habitat generalists and specialists
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DOI：
10.1093/femsec/fiw174
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发表时间：
2016-11-01
影响因子：
4.2
通讯作者：
Huang, Yi
中科院分区：
文献类型：
--
作者：
Liao, Jingqiu;Cao, Xiaofeng;Huang, Yi
群落聚集机制是微生物生态学领域的研究热点。然而，这些机制在多大程度上因群体特征的不同而不同，人们知之甚少。在这里，我们量化了中性和生态位过程在中国21个高原湖泊中细菌、栖息地专家和多面手群落聚集中的重要性。结果表明，中性和生态位过程在整个细菌群落的组装中发挥了关键作用，形成了独特的生物地理格局。确定了一些栖息地通才和许多专家。有趣的是，栖息地专家只受生态位过程的支配，七个显著的环境变量-盐度、溶解氧、水透明度、总磷、氨氮、温度和总氮-独立地解释了40.3%的生物变化。相比之下，生境通才受中性过程的驱动作用较强，50.9%的检测频率变化可用中性群落模型解释。只有三个环境变量-盐度、总氮和溶解氧-显著影响生境通才的分布，独立解释了13.6%的变化。栖息地专家和多面手受到不同组装机制的支配，呈现出不同的生物地理格局。我们的结果强调了在比整个群落更精细的层面上调查细菌群落聚集的重要性。这项工作展示了中国云贵高原21个湖泊的整个细菌群落、专家和通才的生物地理学，并区分了专家和通才的聚集机制。这项工作展示了中国云贵高原21个湖泊的整个细菌群落、专家和通才的生物地理学，并区分了专家和通才的聚集机制。
The mechanisms of community assembly are a central focus in the field of microbial ecology. However, to what extent these mechanisms differ in importance by traits of groups is poorly understood. Here we quantified the importance of neutral and niche processes in community assembly for bacteria, habitat specialists and generalists in 21 plateau lakes of China. Results showed that both neutral and niche processes played a critical role in the assembly of entire bacterial communities, shaping a unique biogeographical pattern. A few habitat generalists and many specialists were identified. Interestingly, habitat specialists were only governed by niche process, with seven significant environmental variables-salinity, dissolved oxygen, water transparency, total phosphorus, ammonium-nitrogen, temperature and total nitrogen-independently explaining 40.3% of the biological variation. By contrast, habitat generalists were strongly driven by neutral process, with 50.9% of the variation of detection frequency explained in neutral community model. Only three environmental variables-salinity, total nitrogen and dissolved oxygen-significantly affected the distribution of habitat generalists, independently explaining 13.6% of the variation. Governed by different assembly mechanisms, habitat specialists and generalists presented disparate biogeographical patterns. Our result emphasizes the importance of investigating the bacterial community assembly at more refined levels than entire communities.This work shows the biogeography of the entire bacterial communities, specialists and generalists in 21 lakes on Yungui Plateau, China and differentiates the assembly mechanisms for specialists and generalists.This work shows the biogeography of the entire bacterial communities, specialists and generalists in 21 lakes on Yungui Plateau, China and differentiates the assembly mechanisms for specialists and generalists.