滴水湖及其引水河道沉积物中的微生物生态调查和研究-环境科学专业论文.docxVIP

上海海洋大学硕士学位论文 上海海洋大学硕士学位论文 切相关，各采样点 OPB、IPB 数量与 TP 含量均呈极显著正相关，且均 高于与 TDP、AP 的相关系数，与引水河道相比，滴水湖湖区沉积物 OPB、IPB 数量与 TP 含量的相关系数更高。 （3）2011 年调查研究显示，滴水湖及其引水河道微生物群落整体 活性较高，闸内引水河、闸外引水河和滴水湖 AWCD 全年最大值分别 为 2.78、2.39、2.38，表明其对外来胁迫所引起的生态系统波动的恢复 能力较高；滴水湖及其引水河道的微生物群落利用糖类及其衍生物和 氨基酸及其衍生物的能力较强，其中利用 L-天门冬酰胺能力最强，各 采样点利用 L-天门冬酰胺的年均光密度值均在 8 以上；各个采样点 Shannon-Wiener 指数 H′随季节变化不显著，微生物群落功能多样性较 为稳定，除 C 港外涟河、C 港内涟河外，其余 6 个采样点在不同季节 达到的最大值均大于 4。 关键词：滴水湖，引水河道，沉积物，优势菌种，有机磷细菌，无机 磷细菌，微生物群落多样性 Ecological study of micro-organisms in sediments of Dishui Lake and its diversion river Abstract Dishui Lake, which is located in the southeast corner of Lingang New City of Shanghai, is the largest artificial lake on the tide beach. It was dug in June 2002, and water was reserved since October 2003. The lake is round, with a total area of 5.56 km2 and an average depth of 3.7 m, and is the core of water scheduling and the heart of the landscape in Lingang New City. The water is mainly derived from the huangpu river, which flows into the Dazhi river, then goes through the Suitang river, Luchao river, finally flows into C-gang wailian river, C-gang neilian river, and then the lake itself. As one of the basic ecological researches on lake, investigation on the community structure of microorganism in sediments of Dishui Lake and its diversion rivers was carried out from January 2010 to October 2011. The research could be divided to three stages. During the first stage, sediment samples were collected from the center of Dishui Lake in summer 2010, and then the culture-dependent dominant micro-organisms were separated, purificated and identificated with Biolog automatic microbiology analysis system to explore the dominate Bacterial colonies’ characteristics in sediment of Dishui Lake. During the second stage from January to December in 2010, the distribution of cultivable organic phosphate solubilizing bacteria (OPB) and inorganic phosphate solubilizing bacteria (IPB) in sediments of Dishui Lake and i