期刊
MICROBES AND ENVIRONMENTS
卷 33, 期 2, 页码 186-194出版社
JAPANESE SOC MICROBIAL ECOLOGY, DEPT BIORESOURCE SCIENCE
DOI: 10.1264/jsme2.ME17194
关键词
Hadal; Mariana Trench; nitrogen cycle; nitrification
资金
- Japan Society for the Promotion of Science (JSPS) [30070015]
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 alpha subgroup of MGI Thaumarchaeota and Ca. Woesearchaeota (Deep-sea Hydrothermal Vent Etuyarchaeotic Group 6). The SSU rRNA gene sequencing analysis indicated that the dominant populations of the thaumarchaeal alpha 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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