Phylotype resolved spatial variation and association patterns of planktonic Thaumarchaeota in eastern Chinese marginal seas  

作　　者：Jiwen Liu Fuyan Huang Jiao Liu Xiaoyue Liu Ruiyun Lin Xiaosong Zhong Brian Austin Xiao-Hua Zhang 

机构地区：[1]Frontiers Science Center for Deep Ocean Multispheres and Earth System,and College of Marine Life Sciences,Ocean University of China,Qingdao 266100,China [2]Laboratory for Marine Ecology and Environmental Science,Laoshan Laboratory,Qingdao 266237,China [3]Institute of Evolution and Marine Biodiversity,Ocean University of China,Qingdao 266003,China [4]Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education,Qingdao 266100,China [5]Institute of Aquaculture,University of Stirling,Stirling FK94LA,Scotland,UK

出　　处：《Marine Life Science & Technology》2023年第2期257-270,共14页海洋生命科学与技术（英文）

基　　金：We thank the scientists and crews on the R/V Dongfanghong 2 for their assistance with sampling during the cruises.We thank Chunying Liu and Guipeng Yang both of the Ocean University of China for providing pH and DO data,respectively.This work was funded by the National Natural Science Foundation of China(92051115,41976101,92251303 and 41730530);the Scientifc and Technological Innovation Project of Laoshan Laboratory(LSKJ202203206 and LSKJ202203201);the Shandong Provincial Natural Science Foundation(ZR2022YQ38);the National Key Research and Development Program of China(2018YFE0124100);the Fundamental Research Funds for the Central Universities(202141009 and 202172002).

摘　　要：The majority of marine ammonia oxidizers belong to Thaumarchaeota,a phylum of Archaea,which is distributed throughout the water column.Marine surface waters contain distinct thaumarchaeotal phylotypes compared to the deeper ocean,but spatial dynamics of the surface-associated lineages are largely unsolved.This study of 120 seawater samples from the eastern Chinese marginal seas identifed contrasting distribution and association patterns among thaumarchaeotal phylotypes across diferent dimensions.Horizontally,Nitrosopumilus-like and Nitrosopelagicus-like phylotypes dominated the surface water(3 m)of the Yellow Sea(YS)and East China Sea(ECS),respectively,along with increased abundance of total free-living Thaumarchaeota in ECS.Similar compositional changes were observed in the surface microlayer.The spatial heterogeneity of particle-attached Thaumarchaeota was less clear in surface microlayers than in surface waters.Vertically,the Nitrosopelagicus-like phylotype increased in abundance from surface to 90 m in ECS,which led to an increase in the proportion of Thaumarchaeota relative to total prokaryotes.This occurred mainly in the free-living fraction.These results indicate a clear size-fractionated niche partitioning,which is more pronounced at lower depths than in the surface water/surface microlayer.In addition,associations of Thaumarchaeota with other microbial taxa varied between phylotypes and size fractions.Our results show that a phylotype-resolved and size-fractionated spatial heterogeneity of the thaumarchaeotal community is present in surface oceanic waters and a vertical variation of the Nitrosopelagicus-like phylotype is present in shallow shelf waters.

关 键 词：Thaumarchaeota PHYLOTYPE Association pattern Spatial variation Surface microlayer Chinese marginal seas 

分 类 号：P73[天文地球—海洋科学]