Community structure and activity potentials of archaeal communities in hadal sediments of the Mariana and Mussau trenches  

作　　者：Zixuan Wang Li Wang Rulong Liu Zhenzhen Li JiaXin Wu Xing Wei Wenxia Wei Jiasong Fang Junwei Cao Yuli Wei Zhe Xie 

机构地区：[1]Shanghai Engineering Research Center of Hadal Science and Technology,College of Marine Sciences,Shanghai Ocean University,Shanghai,201306,China [2]State Key Laboratory of Geological Process and Mineral Resources,Department of Earth Sciences,China University of Geosciences,Wuhan,430074,China [3]Laboratory for Marine Biology and Biotechnology,Qingdao National Laboratory for Marine Science and Technology,Qingdao,266237,China [4]Department of Natural Sciences,Hawaii Pacific University,Honolulu,HI,96813,USA

出　　处：《Marine Life Science & Technology》2022年第1期150-161,共12页海洋生命科学与技术（英文）

基　　金：supported by National Key R&D Program of China(Grant Number 2018YFC0310600);by the National Natural Science Foundation of China(Grant Numbers 91951210,41773069,41906134);by Shanghai Natural Science Foundation(Grant Number 20ZR1423700).

摘　　要：Hadal trenches are the least explored marine habitat on earth. Archaea has been shown to be the dominant group in trench sediments. However, the activity potentials and detailed diversity of these communities as well as their inter-trench variations are still not known. In this study, we combined datasets from two pairs of primers to investigate at high resolution the structure and activity potentials of the archaeal communities in vertically sectioned sediment cores taken from the deepest points of the Mariana (10,853 m) and Mussau (7011 m) trenches. The compositions of the potentially active communities revealed, via 16S ribosomal RNA gene (rDNA) and RNA (rRNA), significant differences between samples. Marine Group I (MGI), with nine identified subgroups, was the most dominant class in the active archaeal communities of the two trenches. Significantly different species composition and vertical variations were observed between the two trenches. Vertical transitions from aerobic MGI α to anaerobic MGI η and υ subgroups were observed in MST but not in MT sediments, which might be related to the faster microbial oxygen consumption in MST. These results provide a better understanding on archaeal activity and diversity in trench sediments.

关 键 词：Hadal trench SEDIMENTS ARCHAEA Diversity Potentially active archaeal community Marine Group I 

分 类 号：Q93[生物学—微生物学]