Microbial Diversity in Sediments from the Bottom of the Challenger Deep, the Mariana Trench

The Challenger Deep is the deepest ocean on Earth. The present study investigated microbial community structures and geochemical cycles associated with the trench bottom sediments of the Challenger Deep, the Mariana Trench. The SSU rRNA gene communities found in trench bottom sediments were dominate...

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Published inMicrobes and Environments Vol. 33; no. 2; pp. 186 - 194
Main Authors Morono, Yuki, Nunoura, Takuro, Nishizawa, Manabu, Hirai, Miho, Shimamura, Shigeru, Inagaki, Fumio, Takai, Ken, Harnvoravongchai, Phurt, Miyazaki, Junichi, Takaki, Yoshihiro, Koide, Osamu, Fukui, Toshiaki
Format Journal Article
LanguageEnglish
Published Japan Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology / Japanese Society of Plant Microbe Interactions / Japanese Society for Extremophiles 2018
Japan Science and Technology Agency
the Japanese Society of Microbial Ecology (JSME)/the Japanese Society of Soil Microbiology (JSSM)/the Taiwan Society of Microbial Ecology (TSME)/the Japanese Society of Plant Microbe Interactions (JSPMI)
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ISSN1342-6311
1347-4405
DOI10.1264/jsme2.ME17194

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Summary:The Challenger Deep is the deepest ocean on Earth. The present study investigated microbial community structures and geochemical cycles associated with the trench bottom sediments of the Challenger Deep, the Mariana Trench. The SSU rRNA gene communities found in trench bottom sediments were dominated by the bacteria Chloroflexi (SAR202 and other lineages), Bacteroidetes, Planctomycetes, “Ca. Marinimicrobia” (SAR406), and Gemmatimonadetes and by the archaeal α subgroup of MGI Thaumarchaeota and “Ca. Woesearchaeota” (Deep-sea Hydrothermal Vent Euryarchaeotic Group 6). The SSU rRNA gene sequencing analysis indicated that the dominant populations of the thaumarchaeal α group in hadal water and sediments were similar to each other at the species or genus level. In addition, the co-occurrence of nitrification and denitrification was revealed by the combination of pore water geochemical analyses and quantitative PCR for nitrifiers.
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Present address: Department of Biology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand.
ISSN:1342-6311
1347-4405
DOI:10.1264/jsme2.ME17194