The diversity and ecological significance of microbial traits potentially involved in B12 biosynthesis in the global ocean

扫码查看

原文链接

NETL
NSTL
万方数据

外文摘要：Cobalamin(B12),an essential nutrient and growth cofactor for many living organisms on Earth,can be fully synthesized only by selected prokaryotes in nature.Therefore,microbial communities related to B12 biosynthesis could serve as an example subsystem to disentangle the underlying ecological mechanisms balancing the function and taxonomic make-up of complex functional assemblages.By anchoring microbial traits potentially involved in B12 biosynthesis,we depict the biogeographic patterns of B12 biosynthesis genes and the taxa harboring them in the global ocean,despite the limitations of detecting de novo B12 synthesizers via metagenomes alone.Both the taxonomic and functional composition of B12 biosynthesis genes were strongly shaped by depth,differentiating the epipelagic zones from the mesopelagic layers.Functional genes related to B12 biosynthesis were relatively stably distributed across different oceans,but the taxa harboring them varied considerably,showing clear functional redundancy among microbial systems.Microbial taxa carrying B12 biosynthesis genes in the surface water were influenced by environmental factors such as temperature,oxygen,and nitrate.However,the composition of functional genes was only weakly associated with these environmental factors.Null model analyses demonstrated that determinism governed the variations in B12 biosynthesis genes,whereas a higher degree of stochasticity was associated with taxonomic variations.Significant associations were observed between the chlorophyll a concentration and B12 biosynthesis,confirming its importance in primary production in the global ocean.The results of this study reveal an essential ecological mechanism governing the assembly of microbes in nature:the environment selects for function rather than taxonomy;functional redundancy underlies stochastic community assembly.

外文关键词：

B12 biosynthesiscommunity assemblyfunctional genesfunctional redundancyocean primary production

作者：

Jiayin Zhou、Wei Qin、Xinda Lu、Yunfeng Yang、David Stahl、Nianzhi Jiao、Jizhong Zhou、Jihua Liu、Qichao Tu

展开 >

作者单位：

Institute of Marine Science and Technology,Shandong University,Qingdao,China

Joint Lab for Ocean Research and Education at Dalhousie University,Shandong University and Xiamen University,Qingdao,China

School of Biological Sciences,University of Oklahoma,Norman,Oklahoma,USA

Department of Civil and Environmental Engineering,Massachusetts Institute of Technology,Cambridge,Massachusetts,USA

DermBiont Inc.,Boston,Massachusetts,USA

State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing,China

Department of Civil and Environmental Engineering,University of Washington,Seattle,Washington,USA

Institute of Marine Microbes and Ecospheres,Xiamen University,Xiamen,China

Earth and Environmental Sciences,Lawrence Berkeley National Laboratory,Berkeley,California,USA

Institute for Environmental Genomics,University of Oklahoma,Norman,Oklahoma,USA

School of Civil Engineering and Environmental Sciences,University of Oklahoma,Norman,Oklahoma,USA

School of Computer Sciences,University of Oklahoma,Norman,Oklahoma,USA

展开 >

基金：

National Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundations of Shandong ProvinceNatural Science Foundations of Shandong ProvinceTaishan Young Scholarship of Shandong ProvinceDistinguished Young Scholarship of Shandong University

项目编号：

2020YFA06076002019YFA06067003197144692051110323715982020ZLYS04ZR2020YQ21

出版年：

2023

DOI：

10.1002/mlf2.12095

微生物(英文)

ISSN：

年,卷(期)：2023.2(4)

参考文献量72