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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/44814

Title: Diversity of Total Bacterial Communities and Chemoautotrophic Populations in Sulfur-Rich Sediments of Shallow-Water Hydrothermal Vents off Kueishan Island
Authors: Li Wang;Man Kit Cheung;Rulong Liu;Chong Kim Wong;Hoi Shan Kwan;Jiang-Shiou Hwang
Contributors: 國立臺灣海洋大學:海洋生物研究所
Keywords: Epsilonproteobacteria;Sulfurimonas;Sulfurovum;rTCA cycle;aclB;Hydrothermal sediment
Date: 2016-12
Issue Date: 2017-11-30T05:56:07Z
Publisher: Microbial Ecology
Abstract: Abstract:Shallow-water hydrothermal vents (HTVs) are an ecologically important habitat with a geographic origin similar to that of deep-sea HTVs. Studies on shallow-water HTVs have not only facilitated understanding of the influences of vents on local ecosystems but also helped to extend the knowledge on deep-sea vents. In this study, the diversity of bacterial communities in the sediments of shallow-water HTVs off Kueishan Island, Taiwan, was investigated by examining the 16S ribosomal RNA gene as well as key functional genes involved in chemoautotrophic carbon fixation (aclB, cbbL and cbbM). In the vent area, Sulfurovum and Sulfurimonas of Epsilonproteobacteria appeared to dominate the benthic bacterial community. Results of aclB gene analysis also suggested involvement of these bacteria in carbon fixation using the reductive tricarboxylic acid (rTCA) cycle. Analysis of the cbbM gene showed that Alphaproteobacterial members such as the purple non-sulfur bacteria were the major chemoautotrophic bacteria involving in carbon fixation via the Calvin–Benson–Bassham (CBB) cycle. However, they only accounted for <2% of the total bacterial community in the vent area. These findings suggest that the rTCA cycle is the major chemoautotrophic carbon fixation pathway in sediments of the shallow-water HTVs off Kueishan Island.
Relation: 73(3), pp.571-582
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/44814
Appears in Collections:[海洋環境與生態研究所] 期刊論文

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