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Title: Bacterial and Archaeal Diversity in an Iron-Rich Coastal Hydrothermal Field in Yamagawa, Kagoshima, Japan
Authors: Kawaichi, Satoshi
Ito, Norihiro
Yoshida, Takashi  kyouindb  KAKEN_id
Sako, Yoshihiko  kyouindb  KAKEN_id
Author's alias: 左子, 芳彦
Keywords: coastal hydrothermal field
thermophiles
chemo-synthetic ecosystem
extremophiles
Issue Date: 20-Dec-2013
Publisher: apanese Society of Microbial Ecology
Japanese Society of Soil Microbiology
Taiwan Society of Microbial Ecology
Journal title: Microbes and Environments
Volume: 28
Issue: 4
Start page: 405
End page: 413
Abstract: Physicochemical characteristics and archaeal and bacterial community structures in an iron-rich coastal hydrothermal field, where the temperature of the most active hot spot reaches above 100°C, were investigated to obtain fundamental information on microbes inhabiting a coastal hydrothermal field. The environmental settings of the coastal hydrothermal field were similar in some degree to those of deep-sea hydrothermal environments because of its emission of H(2), CO(2), and sulfide from the bottom of the hot spot. The results of clone analyses based on the 16S rRNA gene led us to speculate the presence of a chemo-synthetic microbial ecosystem, where chemolithoautotrophic thermophiles, primarily the bacterial orderAquificales, function as primary producers using H2 or sulfur compounds as their energy source and CO(2) as their carbon source, and the organic compounds synthesized by them support the growth of chemoheterotrophic thermophiles, such as members of the orderThermales and the family Desulfurococcaceae. In addition, the dominance of members of the bacterial genus Herbaspirillum in the high temperature bottom layer led us to speculate the temporal formation of mesophilic zones where they can also function as primary producing or nitrogen-fixing bacteria.
Rights: © 2013 Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology
URI: http://hdl.handle.net/2433/197317
DOI(Published Version): 10.1264/jsme2.ME13048
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