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FEMS Microbiol Ecol

Title:		"Characterization of the bacterial community composition in a hypoxic zone induced by Microcystis blooms in Lake Taihu, China"
Author(s):		Li H; Xing P; Wu QL;
Address:		"State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography & Limnology, Chinese Academy of Science, Nanjing, China"
Journal Title:		FEMS Microbiol Ecol
Year:		2012
Volume:		20120104
Issue:		3
Page Number:		773 - 784
DOI:		10.1111/j.1574-6941.2011.01262.x
ISSN/ISBN:		1574-6941 (Electronic) 0168-6496 (Linking)
Abstract:		"Cyanobacterial blooms have become more frequent as a result of eutrophication in lakes. The accumulation and breakdown of huge cyanobacterial biomasses often cause hypoxia in lakes. However, little is known about microbial diversity in these areas. In this study, we characterized the bacterial community composition of a Microcystis-bloom-induced hypoxic area in Lake Taihu, which is a large, shallow lake, by analysing terminal restriction fragment length polymorphisms of 16S ribosomal RNA genes and clone libraries generated from selected samples. Bacterial samples were collected at different sites within the hypoxic zone at different times during the development of hypoxia. The results showed that the composition of both free-living and particle-attached bacterial communities in the water column varied spatially and temporally and that these variations were largely related to changes in the concentrations of dissolved oxygen and ions in the water column. Sequences affiliated with Clostridium were predominantly found at the onset of hypoxia, whereas members of the LD12 cluster were detected at the posthypoxia stage; Desulfovibrio and Comamonadaceae dominated throughout the hypoxic event. We speculate that these organisms may be associated with the decomposition of Microcystis biomass and the production of volatile organic compounds; however, their specific function in Microcystis-bloom-induced hypoxia warrants further study"
Keywords:		"Bacteria/*classification/genetics/growth & development Base Sequence Biomass China *Eutrophication Lakes/*microbiology Microcystis/*growth & development Molecular Sequence Data Polymorphism, Restriction Fragment Length RNA, Ribosomal, 16S/genetics;"
Notes:		"MedlineLi, Huabing Xing, Peng Wu, Qinglong L eng Research Support, Non-U.S. Gov't England 2011/12/01 FEMS Microbiol Ecol. 2012 Mar; 79(3):773-84. doi: 10.1111/j.1574-6941.2011.01262.x. Epub 2012 Jan 4"