Bacterial Community Structure of Sediment in Upstream Ecological Wetland of Guanting Reservoir under the Action of Different Plants in Winter

In order to study the effect of reed and cattail on the bacterial community structure of surface sediments of wetland in winter,highthroughput sequencing technology was used to analyze the bacterial composition. The results showed that 134 228 high-quality gene sequences were obtained by high-throughput sequencing in sediments of natural wetland in winter,and there were 13 866 OTUs,in which the number of OUT in sediments of reed wetland and cattail wetland was 6 677 and 7 189 respectively. The richness and diversity of bacterial communities in sediments of cattail wetland in winter were higher than those in sediments of reed wetland. Relative abundance of Proteobacteria in sediments of reed wetland and cattail wetland was 0. 54 and 0. 52,respectively. The dominant classes of bacteria were Betaproteobacteria,Deltaproteobacteria,Gammaproteobacteria and Epsilonproteobacteria,which belonged to gram-negative bacteria,indicating that the rhizosphere of wetland was easier to enrich gram-negative bacteria. Under the genus level,the dominant bacteria in the sediments were not obvious.

官厅水库入库口复合湿地系统对入库水质的净化

官厅水库入库口复合湿地系统建设以恢复官厅水库饮用水源地功能、保障供水安全、促进流域水资源可持续发展为目标,在对水库水源水质进行全面调查、监测、分析基础上,借鉴国内外最新技术经验,采用并建设了前置库自然湿地和人工构造湿地的入库口复合湿地系统,突破了水库流域水生态环境治理中的关键与难点技术,成功实施了官厅水库水质改善和生态修复,形成了适宜于北方低温干旱地区水库水生态环境综合治理技术体系,为恢复官厅水库饮用水源功能发挥了关键作用,为水库水质保护和生态恢复探索了一条可行道路.

利用生态技术治理官厅水库水体污染的探索

北京市官厅水库管理处以恢复官厅水库饮用水源功能为目标,针对水库水体污染状况,重点围绕永定河入库口、库区水域和周边库滨带,采用国际先进的水体修复新理念、新技术,积极探索利用生态、生物技术综合治理水体污染,并已取得初步成效。

库滨湿地生态修复研究及其工程应用:以官厅水库国家湿地公园为例

官厅水库作为北京备用水源地和西北部生态涵养区的重要节点,近年来面临生物多样性下降、滩涂人为侵占严重、水质退化等严重问题。为整体提升官厅水库库滨湿地的环境质量,改善周边人居环境,基于库区水面高程特点进行功能区划,通过污染源治理工程、湿地生态保育工程以及湿地修复及重建三大工程,重塑官厅水库库滨湿地景观,为解决库滨湿地生态环境保护与地区经济发展之间的矛盾提供技术借鉴和参考。