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Temporal distribution of bacterial community structure in the Changjiang Estuary hypoxia area and the adjacent East China Sea

文献类型: 外文期刊

作者: Liu, Min 1 ; Xiao, Tian 2 ; Wu, Ying 3 ; Zhou, Feng 4 ; Huang, Huiqin 1 ; Bao, Shixiang 1 ; Zhang, Wuchang 2 ;

作者机构: 1.CATAS, Key Lab Biol & Genet Resources Trop Crops, Inst Trop Biosci & Biotechnol, Haikou 571101, Peoples R China

2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China

3.E China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200241, Peoples R China

4.State Ocean Adm, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou 310012, Zhejiang, Peoples R China

关键词: bacterial community structure;DGGE;CCA;Changjiang Estuary hypoxia area;East China Sea

期刊名称:ENVIRONMENTAL RESEARCH LETTERS ( 影响因子:6.793; 五年影响因子:7.801 )

ISSN: 1748-9326

年卷期: 2012 年 7 卷 2 期

页码:

收录情况: SCI

摘要: Bacterial community structure and the effects of environmental factors on the microbial community distribution were investigated in the Changjiang Estuary hypoxia area and its adjacent area in the East China Sea (ECS) in June, August and October, 2006. Profiles of bacterial communities were generated by denaturing gradient gel electrophoresis (DGGE) of 16S rRNA genes followed by DNA sequence analysis. The dominant bacterial groups were affiliated to Gammaproteobacteria, Cytophaga-Flavobacteria-Bacteroides (CFB), Deltaproteobacteria, Cyanobacteria and Firmicutes, which were mostly from the marine seawater ecosystem. Effects of environmental factors on the bacterial community distribution were analyzed by the ordination technique of canonical correspondence analysis (CCA). The environmental factors significantly influencing bacterial community structure were different in the three months; dissolved organic carbon (DOC) and temperature in June and nitrite in August. No environmental variables displayed significant influence on the bacterial community at the 5% level in October. The seasonal environmental heterogeneity in the Changjiang Estuary and the adjacent ECS, such as seasonal hydrodynamic conditions and riverine input of nutrients, might be the reason for the difference in the key environmental factors determining the bacterial community in the three months.

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