项目名称： 长江中游吞吐调蓄型湖泊细菌群落组成变化的季节同步性规律研究

项目编号： No.31500423

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 生态学

项目作者： 牛远

作者单位： 中国环境科学研究院

项目金额： 20万元

中文摘要： 在湖泊生态系统中，细菌不仅是生物量的重要组成部分，对于物质循环和能量传递过程也起着关键的作用。掌握湖泊细菌群落的组成、多样性以及它们的分布规律对于深入的了解湖泊生态系统具有重要的意义。目前为止，关于区域尺度上不同湖泊细菌群体组成季节变化规律的比较研究十分缺乏，湖泊生态系统的内部因子和区域尺度上的外部因子各自扮演着什么角色存在不少的争议。鄱阳湖和洞庭湖分别是我国第一、第二大淡水湖，也是长江中游典型的吞吐调蓄型湖泊。本项目拟通过野外采样、454测序结合后续统计分析手段首次系统的研究长江中游吞吐调蓄型湖泊的细菌群体组成的季节变化、同步性规律以及环境因子的驱动作用，填补此特殊类型湖泊微生物生态学研究的空白，有利于更好的理解湖泊生态系统细菌群落分布特征和形成机制，对湖泊细菌群体生态学的研究具有重要的意义。

中文关键词： 吞吐调蓄型湖泊；细菌群落组成；季节性；同步性

英文摘要： In lake ecosystems, bacteria not only comprises a large fraction of biomass，but also plays a crucial role in nutrient cycling and energy flow. Knowing the bacterial community composition, diversity and spatiotemporal distribution patterns are of great significance for understanding the lake ecosystems comprehensively. So far, there are few studies concerning seasonality and synchrony in bacterial community composition of different lakes at a regional scale. The relative importance of intrinsic (site-specific) and extrinsic (regional) drivers is a topic of much debate. Poyang Lake and Dongting Lake, which are typical regulating lakes located in middle reaches of Changjiang River, are the first and second largest freshwater lake in China, respectively. The present study aims at exploring the seasonality and synchrony in bacterial community composition and its driving forces of regulating lakes located in middle reaches of Yangtze River by field sampling, 454 sequencing and statistical analysis. It will facilitate a better understanding of the distribution characteristics and formation mechanisms of bacteria communities in lakes.

英文关键词： regulating lakes;bacterial community composition;seasonality;synchrony