A nearly uniform distributional pattern of heterotrophic bacteria in the Mariana Trench interior

Tian, Jiwei1; Fan, Lu2,3; Liu, Haodong4; Liu, Jiwen5; Li, Yi6; Qin, Qilong6; Gong, Zheng5; Chen, Hongtao7; Sun, Zhongbin1; Zou, Li8; Wang, Xuchen7; Xu, Hongzhou9; Bartlett, Douglas10; Wang, Min5; Zhang, Yu-Zhong6; Zhang, Xiao-Hua5; Zhang, Chuanlun L.2,11

2018-12

10.1016/j.dsr.2018.10.002

DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS   影响因子和分区

0967-0637

1879-0119

The uniqueness of hadal trench environment and its potential role in global carbon sequestration allows for a detailed study of microbially driven carbon cycle of the trench system. Limited studies on microbiology by far have suggested that the hadal-sphere generally hosts a heterotrophic microbial community that is mostly fed by surface-sinking organic matter or re-suspended and laterally transported organic matter from sediments. However, temporal dynamics in trench microbial community in connection to surface and sediment organic carbon exports is still beyond our knowledge. In this study, we conducted vertical sampling and analysis of the microbial community from the epipelagic zone down to the hadal zone at the Mariana Trench. 16S rRNA gene composition showed high variations at the first 1000 m below surface (mbs); however, a nearly uniform microbial community composition (Jaccard dissimilarity less than 73%) was observed below 1000 mbs and down into the bottom of the trench. The deep-sea bacteria were generally chemoheterotrophs characterized by Erythrobacter, Rhodovulum, Alteromonas, some Marinobacter, etc., which were also present at the ocean surface. Several deep-sea-enriched but surface-depleted bacteria include Glaciecola, Oceanicola and Oleibacter were potential degraders of large organic polymers. In spite of consistent community composition, enhanced chromophoric dissolved organic matter proportions in the hadal zone of the trench might imply intensified microbial activity compared to the water column above. These observations suggest an unusual transitory state of the Mariana Trench water columns and extend our understanding of the dynamics of the hadal microbial community.

Mariana Trench Hadal environment Archaea and bacteria Biogeochemistry Organic matter

SCI ; EI

英语

通讯

Southern University of Science and Technology[Y01316209]

Oceanography

Oceanography

WOS:000453491000010

PERGAMON-ELSEVIER SCIENCE LTD

20184706116590

Bacteria ; Biogeochemistry ; Biological materials ; Forestry ; Organic carbon ; RNA ; Surface waters ; Suspended sediments

Surface Water:444.1 ; Biological Materials and Tissue Engineering:461.2 ; Geochemistry:481.2 ; Soil Mechanics and Foundations:483 ; Organic Compounds:804.1 ; Organic Polymers:815.1.1

GEOSCIENCES

Web of Science

1.Ocean Univ China, Key Lab Phys Oceanog, Qingdao 266100, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Key Lab Marine Archaea Geoom, Dept Ocean Sci & Engn, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, SUSTech Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China
4.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
5.Ocean Univ China, Coll Marine Life Sci, Qingdao 266003, Peoples R China
6.Shandong Univ, Marine Biotechnol Res Ctr, State Key Lab Microbial Technol, Jinan 250100, Peoples R China
7.Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Peoples R China
8.Ocean Univ China, Key Lab Marine Environm Sci & Ecol, Qingdao 266100, Peoples R China
9.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
10.Univ Calif San Diego, Scripps Inst Oceanog, Div Marine Biol Res, La Jolla, CA 92093 USA
11.Qingdao Pilot Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China

Tian, Jiwei,Fan, Lu,Liu, Haodong,et al. A nearly uniform distributional pattern of heterotrophic bacteria in the Mariana Trench interior[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2018,142:116-126.

Tian, Jiwei.,Fan, Lu.,Liu, Haodong.,Liu, Jiwen.,Li, Yi.,...&Zhang, Chuanlun L..(2018).A nearly uniform distributional pattern of heterotrophic bacteria in the Mariana Trench interior.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,142,116-126.

Tian, Jiwei,et al."A nearly uniform distributional pattern of heterotrophic bacteria in the Mariana Trench interior".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 142(2018):116-126.