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Article

Diversity Distribution, Driving Factors and Assembly Mechanisms of Free-Living and Particle-Associated Bacterial Communities at a Subtropical Marginal Sea

by 1, 1,†, 1,‡, 1, 1, 1 and 1,2,*
1
State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
2
Department of Marine Sciences, University of Connecticut, Groton, CT 06340, USA
*
Author to whom correspondence should be addressed.
Present address: Biology Department and Institute of Marine Sciences, College of Science, Shantou University, Shantou 515063, China.
Present address: National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China.
Academic Editor: Ulrich (Uli) Stingl
Microorganisms 2021, 9(12), 2445; https://doi.org/10.3390/microorganisms9122445
Received: 1 November 2021 / Revised: 21 November 2021 / Accepted: 24 November 2021 / Published: 27 November 2021
(This article belongs to the Section Environmental Microbiology)
Free-living (FL) and particle-associated (PA) bacterioplankton communities play critical roles in biogeochemical cycles in the ocean. However, their community composition, assembly process and functions in the continental shelf and slope regions are poorly understood. Based on 16S rRNA gene amplicon sequencing, we investigated bacterial communities’ driving factors, assembly processes and functional potentials at a subtropical marginal sea. The bacterioplankton community showed specific distribution patterns with respect to lifestyle (free living vs. particle associated), habitat (slope vs. shelf) and depth (surface vs. DCM and Bottom). Salinity and water temperature were the key factors modulating turnover in the FL community, whereas nitrite, silicate and phosphate were the key factors for the PA community. Model analyses revealed that stochastic processes outweighed deterministic processes and had stronger influences on PA than FL. Homogeneous selection (Hos) was more responsible for the assembly and turnover of FL, while drift and dispersal limitation contributed more to the assembly of PA. Importantly, the primary contributor to Hos in PA was Gammaproteobacteria:Others, whereas that in FL was Cyanobacteria:Bin6. Finally, the PICRUSt2 analysis indicated that the potential metabolisms of carbohydrates, cofactors, amino acids, terpenoids, polyketides, lipids and antibiotic resistance were markedly enriched in PA than FL. View Full-Text
Keywords: marine bacterioplankton; spatial variability; particle associated; community assembly; iCAMP-based null model; neutral community model marine bacterioplankton; spatial variability; particle associated; community assembly; iCAMP-based null model; neutral community model
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MDPI and ACS Style

Yuan, H.; Li, T.; Li, H.; Wang, C.; Li, L.; Lin, X.; Lin, S. Diversity Distribution, Driving Factors and Assembly Mechanisms of Free-Living and Particle-Associated Bacterial Communities at a Subtropical Marginal Sea. Microorganisms 2021, 9, 2445. https://doi.org/10.3390/microorganisms9122445

AMA Style

Yuan H, Li T, Li H, Wang C, Li L, Lin X, Lin S. Diversity Distribution, Driving Factors and Assembly Mechanisms of Free-Living and Particle-Associated Bacterial Communities at a Subtropical Marginal Sea. Microorganisms. 2021; 9(12):2445. https://doi.org/10.3390/microorganisms9122445

Chicago/Turabian Style

Yuan, Huatao, Tangcheng Li, Hongfei Li, Cong Wang, Ling Li, Xin Lin, and Senjie Lin. 2021. "Diversity Distribution, Driving Factors and Assembly Mechanisms of Free-Living and Particle-Associated Bacterial Communities at a Subtropical Marginal Sea" Microorganisms 9, no. 12: 2445. https://doi.org/10.3390/microorganisms9122445

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