Linking Bacterial Communities to Optical-Derived Properties of Porewater DOM in Sediments in the Coastal East China Sea

Li, Minchun1; Xie, Wei1; Zhang, Chuanlun2,3,4; Yin, Kedong1

2022-06-21

10.3389/fmars.2022.919368

FRONTIERS IN MARINE SCIENCE   Impact Factor & Quartile

2296-7745

Bacterial communities and porewater dissolved organic matter (DOM) pool are intimately interactive in sedimentary environments. Estuarine coastal regions are an interactive area between terrestrial and marine influences in terms of DOM origins and freshness. Yet, we know little about the relationships between the bacterial communities and DOM in those regions. In this study, porewater DOM samples were collected from 42 sites in the coastal East China Sea. The porewater DOM optical properties were determined by fluorescence and absorption spectra, while the corresponding bacterial community compositions of those sediments were examined by 16S rRNA gene high-throughput sequencing. The results showed that bacterial species richness was positively correlated with multiple terrestrial indicators based on the optical properties of DOM, which implied that heterogeneous DOM from terrestrial origins might harbor a wider spectrum of bacterial taxa in marine sediments. The analysis of the co-occurrence network of the bacterial communities showed that the edges and density for samples with low DOM freshness were 3.4 times and 3 times those for the samples with high DOM freshness, respectively. This suggested that the connection among the bacterial taxa under the lower DOM freshness condition were enhanced and that reduced freshness of DOM may encourage more complimentary utilization of resources. The findings provide a new insight into such interactive processes of heterogeneous organic matter utilization meditated by microorganisms in coastal sediments.

sediment pore water dissolved organic matter (DOM) bacterial community co-occurrence networks

SCI

English

Others

National Natural Science Foundation of China["92051117","41776137","91851210","42141003"] ; State Key R&D project of China[2018YFA0605800] ; Shenzhen Key Laboratory of Marine Archaea Geo-Omics, Southern University of Science and Technology[ZDSYS20180208184349083] ; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[K19313901] ; GDNRC[[2021]62] ; NSFC-GD[U1701247]

Environmental Sciences & Ecology ; Marine & Freshwater Biology

Environmental Sciences ; Marine & Freshwater Biology

WOS:000820867900001

FRONTIERS MEDIA SA

Web of Science

1.Sun Yat Sen Univ & Southern Marine Sci & Engn, Sch Marine Sci, Guangdong Prov Key Lab Marine Resources & Coastal, Guangdong Lab Zhuhai, Zhuhai, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Key Lab Marine Archaea Geo, Shenzhen, Peoples R China
3.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen, Peoples R China
4.Southern Marine Sci & Engn Guangdong Lab Guangzhou, Guangzhou, Peoples R China

Li, Minchun,Xie, Wei,Zhang, Chuanlun,et al. Linking Bacterial Communities to Optical-Derived Properties of Porewater DOM in Sediments in the Coastal East China Sea[J]. FRONTIERS IN MARINE SCIENCE,2022,9.

Li, Minchun,Xie, Wei,Zhang, Chuanlun,&Yin, Kedong.(2022).Linking Bacterial Communities to Optical-Derived Properties of Porewater DOM in Sediments in the Coastal East China Sea.FRONTIERS IN MARINE SCIENCE,9.

Li, Minchun,et al."Linking Bacterial Communities to Optical-Derived Properties of Porewater DOM in Sediments in the Coastal East China Sea".FRONTIERS IN MARINE SCIENCE 9(2022).