Abstract

To investigate the interactions between bacterial species in relation to the biotic and abiotic environmental fluctuations, free-living (FL), nanoparticle-associated (NP), and microparticle-associated (MP) bacterial community compositions (BCCs) were analyzed. A total of 267 samples were collected from July to December 2016 in the dynamic and shallow southern coastal water of Korea. The variations in BCC mostly depended on planktonic size fraction. Network analysis revealed water depth-dependent co-occurrence patterns of coastal bacterial communities. Higher interspecies connectivity was observed within FL bacteria than NP/MP bacteria, suggesting that FL bacteria with a streamlined genome may need other bacterial metabolites for survival, while the NP/MP copiotrophs may have the self-supporting capacity to produce the vital nutrients. The analysis of topological roles of individual OTUs in the network revealed that several groups of metabolically versatile bacteria (the marine Roseobacters, Flavobacteriales, Desulfobacterales, and SAR406 clade) acted as module hubs in different water depth. In conclusion, interspecies interactions dominated in FL bacteria, compared to NP and MP bacteria; modular structures of bacterial communities and keystone species strongly depended on the water depth-derived environmental factors. Furthermore, the multifunctional, versatile FL bacteria could play pivotal roles in dynamic shallow coastal ecosystems.

Details

Title
The water depth-dependent co-occurrence patterns of marine bacteria in shallow and dynamic Southern Coast, Korea
Author
Cui, Yingshun 1 ; Seong-Jun, Chun 2 ; Seung Ho Baek 3 ; Lee, Minji 3 ; Kim, Yunji 3 ; Lee, Hyung-Gwan 1 ; So-Ra Ko 1 ; Hwang, Seungwoo 4 ; Chi-Yong, Ahn 2   VIAFID ORCID Logo  ; Hee-Mock Oh 2   VIAFID ORCID Logo 

1  Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Republic of Korea 
2  Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), Daejeon, Republic of Korea 
3  South Sea Institute, Korea Institute of Ocean Science & Technology (KIOST), Geoje, Republic of Korea 
4  Korean Bioinformation Center (KOBIC), KRIBB, Daejeon, Republic of Korea 
Pages
1-13
Publication year
2019
Publication date
Jun 2019
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41598-019-45512-5
ProQuest document ID
2246230587
Copyright
© 2019. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.