Nearly a decade-long repeatable seasonal diversity patterns of bacterioplankton communities in the eutrophic Lake Donghu (Wuhan, China)
Nearly a decade-long repeatable seasonal diversity patterns of bacterioplankton communities in the eutrophic Lake Donghu (Wuhan, China)
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富营养化东湖（中国武汉）浮游细菌群落近十年的可重复季节多样性模式
DOI：
10.1111/mec.14151
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发表时间：
2017
影响因子：
4.9
通讯作者：
Zhou Jizhong
中科院分区：
文献类型：
--
作者：
Yan Qingyun;Stegen James C;Yu Yuhe;Deng Ye;Li Xinghao;Wu Shu;Dai Lili;Zhang Xiang;Li Jinjin;Wang Chun;Ni Jiajia;Li Xuemei;Hu Hongjuan;Xiao Fanshu;Feng Weisong;Ning Daliang;He Zhili;Van Nostr;Joy D;Wu Liyou;Zhou Jizhong
揭示哪些环境因素支配群落多样性模式以及生态过程如何驱动群落周转是与了解群落组装相关的关键问题。然而，调节湖泊生态系统中浮游细菌群落长期变化的生态机制仍然知之甚少。在这里，我们使用MiSeq平台的16 S rRNA基因扩增子测序对富营养化东湖（中国武汉）的浮游细菌群落进行了近十年的研究。我们发现，在常见（超过50%的样本中检测到）和占主导地位（相对丰度>1%）的细菌类群营业额方面，都有很强的可重复的季节性多样性模式。此外，群落组成跟踪季节温度梯度，表明温度是一个关键的环境因素控制观察到的多样性模式。总磷也有助于显着的浮游细菌组成的季节性变化。然而，任何空间格局的浮游细菌群落在整个主要湖区的季节内被淹没的时间变化。系统发育分析进一步表明，由于季节内一致的环境条件，75%-82%的群落更替受到均匀选择的控制，表明东湖微生物群落主要受生态位过程控制。因此，在季节内的优势生态位可能会被占领的细菌类群与适度的分散率在不同的湖泊地区的类似组合。
Uncovering which environmental factors govern community diversity patterns and how ecological processes drive community turnover are key questions related to understand the community assembly. However, the ecological mechanisms regulating long‐term variations of bacterioplankton communities in lake ecosystems remain poorly understood. Here we present nearly a decade‐long study of bacterioplankton communities from the eutrophic Lake Donghu (Wuhan, China) using 16S rRNA gene amplicon sequencing with MiSeq platform. We found strong repeatable seasonal diversity patterns in terms of both common (detected in more than 50% samples) and dominant (relative abundance >1%) bacterial taxa turnover. Moreover, community composition tracked the seasonal temperature gradient, indicating that temperature is a key environmental factor controlling observed diversity patterns. Total phosphorus also contributed significantly to the seasonal shifts in bacterioplankton composition. However, any spatial pattern of bacterioplankton communities across the main lake areas within season was overwhelmed by their temporal variabilities. Phylogenetic analysis further indicated that 75%–82% of community turnover was governed by homogeneous selection due to consistent environmental conditions within seasons, suggesting that the microbial communities in Lake Donghu are mainly controlled by niche‐based processes. Therefore, dominant niches available within seasons might be occupied by similar combinations of bacterial taxa with modest dispersal rates throughout different lake areas.