Spatial Diversity of Bacterioplankton Communities in Surface Water of Northern South China Sea

Li, Jialin; Li, Nan; Li, Fuchao; Zou, Tao; Yu, Shuxian; Wang, Yinchu; Qin, Song; Wang, Guangyi

doi:10.1371/journal.pone.0113014

Cited by 20 publications

(18 citation statements)

References 56 publications

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“…Finally, in the Bacteroidetes, Cytophagales OTU826306 (correlation coefficient with CH 4 = 0.33, p = 0.05), was most similar to microorganisms from a variety of marine environments including surface seawater (Li et al, 2014), seawater particles (D'Ambrosio et al, 2014) and corals (Sunagawa et al, 2010). As discussed above, the Cytophagales species described here is not closely related to a known hydrocarbon degrader, thus why its abundance is significantly correlated with CH 4 concentrations is unknown.…”

Section: Euphotic Zone Bacterioplankton Structure and Diversitymentioning

confidence: 71%

Methane and microbial dynamics in the Gulf of Mexico water column

et al. 2015

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In contrast to other oligotrophic water bodies the Gulf of Mexico (GOM) hosts an abundance of hydrocarbon seeps, which likely influences the microbial assemblages it hosts particularly regarding the availability of labile carbon in the aphotic GOM. The aphotic zone receives direct injection of seep methane (CH 4 ), but CH 4 from an unknown source has been reported at supersaturated concentrations relative to the atmosphere in the GOM photic zone. Here we used iTag sequencing of 16S rRNA genes to characterize GOM microbial communities and to relate changes in microbial community structure to the properties inherent to their oceanic province-seafloor to the photic zone, seep and non-seep. Along this trajectory water column communities were distinct in the euphotic zone compared to the mesopelagic and deep-sea. In the euphotic zone the relative abundance of a cyanobacterial species (Prochlorococcus) was significantly correlated with both CH 4 and chlorophyll a concentrations and was abundant in some deep-chlorophyll maximum (DCM) samples. The relative abundance of microorganisms related to known hydrocarbon degraders were also significantly correlated with CH 4 in the euphotic zone, but no canonical methanotrophs were observed. In the mesopelagic to the seafloor canonical methanotrophs were identified, but only a Marine Group II Euryarchaeota was significantly correlated with CH 4 . Overall, depth and the associated environmental conditions were the primary drivers in structuring microbial communities over the GOM water column. Further, CH 4 concentrations and relative microbial abundances covaried significantly from the seafloor to the photic zone in the GOM. The lack of a significant relationship between canonical methanotrophs and CH 4 in the aphotic zone, even when sampling at seep sites, may suggest methane-oxidation by unknown microorganisms. Similarly their absence in the CH 4 maximum and DCM suggested that CH 4 is either oxidized by unrecognized methanotrophs or escapes the CH 4 biofilter and fluxes to the atmosphere.

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Section: Euphotic Zone Bacterioplankton Structure and Diversitymentioning

confidence: 71%

Methane and microbial dynamics in the Gulf of Mexico water column

et al. 2015

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“…Gong et al (2015) have identified that water depth was the debisive fabtor to shape biogeography pattern of benthib mibrobial eukaryotes in the surfabe sediments of boastal sea. Our previous study (Li et al 2014) also displayed that water depth played a surprisingly signifibant role in shaping babterial biogeography in the upper 5 meters of water bolumn bharabterized with bomplex birbulation systems. We bonsider that water depth may funbtion as a bomprehensive proxy of multiple physibobhemibal parameters rather than direbtly affebt mibrobial diversity.…”

Section: Introdubtionmentioning

confidence: 73%

Peer Review #1 of "Distribution of bacterial communities along the spatial and environmental gradients from Bohai Sea to northern Yellow Sea (v0.1)"

Hogle¹

2018

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The eutrophic Bohai Sea receives large amount of suspended matters, nutrients and contaminant from terrestrial runoff, and exchanges waters with the northern Yellow Sea through a narrow strait. This coastal region provides an ideal model system to study microbial biogeography. We performed high-throughput sequencing to investigate spatial distribution of bacterial communities along the spatial and environmental gradients. The results showed bacterial communities presented remarkable horizontal and vertical distribution under coastal gradients. Fourteen abundant taxa clustered the samples into three distinctive groups, reflecting typical habitats in shallow coastal water (depth ≤ 20 m), sunlit surface layer and bottom water (at 2-3 m above sediment). The most significant taxa of each cluster were determined by the least discriminant analysis effect size, and strongly correlated with spatial and environmental variables. Environmental factors (especially turbidity and nitrite) exhibited significant influences on surface bacterial betadiversity, while community similarity in bottom water was mainly determined by depth. Geographic distance enhanced bacterial community dissimilarity and limited bacteria distribution in both surface and bottom water. Bacterial dispersal was also constrained by phosphate, which was possible due to the high ratios of N/P in this coastal sea area.

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mentioning

confidence: 94%

“…In addition, the distribution of the most abundant picophytoplankton groups, such as Prochlorococcus and Synechococcus , was found to be significantly influenced by warm or cold eddies (Jing & Liu, ; Wang, Tan et al., ). Bacterial communities have also been found to be influenced by cyclonic (Zhang, Jiao, Sun, Hu, & Zheng, ; Zhang, Zhao, Sun, & Jiao, ) and anticyclonic (Li et al., ) eddy perturbations. For example, the distributions of some deep‐water groups were found to exhibit isopycnal uplift (Zhang, Jiao et al., ), and diazotrophic Proteobacteria were found to attain new nitrogen from mesoscale cyclonic eddies, which contributed to nitrogen fixation (Zhang, Zhao et al., ).…”

Section: Introductionmentioning

confidence: 99%

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Community differentiation of bacterioplankton in the epipelagic layer in the South China Sea

Zhang

Cheng

et al. 2018

Ecology and Evolution

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The South China Sea (SCS) is the largest marginal sea in the western tropical Pacific Ocean and is characterized by complex physicochemical environments. To date, the biogeographic patterns of the microbial communities have rarely been reported at a basin scale in the SCS. In this study, the bacterial assemblages inhabiting the epipelagic zone across 110°E to 119°E along 14°N latitude were uncovered. The vertical stratification of both bacterial taxa and their potential functions were revealed. These results suggest that the water depth‐specific environment is a driver of the vertical bacterioplankton distribution. Moreover, the bacterial communities were different between the eastern stations and the western stations, where the environmental conditions were distinct. However, the mesoscale eddy did not show an obvious effect on the bacterial community due to the large distance between the sampling site and the center of the eddy. In addition to the water depth and longitudinal location of the samples, the heterogeneity of the phosphate and salinity concentrations also significantly contributed to the variance in the epipelagic bacterial community in the SCS. To the best of our knowledge, this study is the first to report that the variability in epipelagic bacterioplankton is driven by the physicochemical environment at the basin scale in the SCS. Our results emphasize that the ecological significance of bacterioplankton can be better understood by considering the relationship between the biogeographic distribution of bacteria and the oceanic dynamics processes.

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Spatial Diversity of Bacterioplankton Communities in Surface Water of Northern South China Sea

Cited by 20 publications

References 56 publications

Methane and microbial dynamics in the Gulf of Mexico water column

Methane and microbial dynamics in the Gulf of Mexico water column

Peer Review #1 of "Distribution of bacterial communities along the spatial and environmental gradients from Bohai Sea to northern Yellow Sea (v0.1)"

Community differentiation of bacterioplankton in the epipelagic layer in the South China Sea

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