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标题：ANALYSIS ON THE POPULATION STRUCTURE OF PLANKTONIC BACTERIA AND PHYSICOCHEMICAL FACTORS OF WATER BODY IN A CLOSED EUTROPHICATION LANGSCAPE LAKE
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作者：Li Yin ; Xuan Zhou ; Yonghui Liao 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2020
卷号：29
期号：10
页码：9334-9344
语种：English
出版社：PSP Publishing
摘要：A 12-month dynamic analysis concerning the planktonic bacteria and the physicochemical factors of water body in a typical eutrophicated landscape lake was investigated through the use of denatured gradient gel electrophoresis (DGGE).According to the results,the total number of DNA fingerprint bands of the planktonic bacteria were between 18-25 for each month.A seasonal variation was observed as the eutrophication months exhibited a significantly higher proportion in the number of DNA fingerprint bands in comparison to other months.The dominant populations in this landscape water body included Proteobacteria,Actinobacteria,Bac-teroides,Planocomycetes,Cyanobacteria,among which Bacteroidetes,Nitrobacteria and Cyanobacteria demonstrated the highest abundance in July and August.When combined with the variation and qualities of water body,it was found that the bacterial diversity was positively correlated with the chemical oxygen demand (COD) and the content of chloro-phyll-a,but negatively correlated with dissolved oxygen (DO) and total nitrogen (TN).These findings suggest that there is a close association between microorganism,physicochemical factors of water body and algae.High temperature and high nutrition cause eutrophication of water,improve the diversity of planktonic bacteria,and accelerate the evolution of bacterial population in closed landscape water body.
关键词：Eutrophication;landscape water;PCR-DGGE;planktonic bacteria;population structure