Correspondence between DOM molecules and microbial community in a subtropical coastal estuary on a spatiotemporal scale

Qi Chen; Feng Chen; Michael Gonsior; Yunyun Li; Yu Wang; Chen He; Ruanhong Cai; Jinxin Xu; Yimeng Wang; Dapeng Xu; Jia Sun; Ting Zhang; Quan Shi; Nianzhi Jiao; Qiang Zheng

Environment International (Sep 2021)

Correspondence between DOM molecules and microbial community in a subtropical coastal estuary on a spatiotemporal scale

Qi Chen,
Feng Chen,
Michael Gonsior,
Yunyun Li,
Yu Wang,
Chen He,
Ruanhong Cai,
Jinxin Xu,
Yimeng Wang,
Dapeng Xu,
Jia Sun,
Ting Zhang,
Quan Shi,
Nianzhi Jiao,
Qiang Zheng

Affiliations

Qi Chen: State Key Laboratory for Marine Environmental Science, Institute of Marine Microbes and Ecospheres, College of Ocean and Earth Sciences, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China; Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China
Feng Chen: Institute of Marine and Environmental Technology, University of Maryland Center for Environmental Science, 701 East Pratt Street, Baltimore, MD 21202, United States
Michael Gonsior: Chesapeake Biological Laboratory, University of Maryland Center for Environmental Science, 146 Williams Street, Solomons, MD 20688, United States
Yunyun Li: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18 Fuxue Road, Changping District, Beijing 102249, China
Yu Wang: State Key Laboratory for Marine Environmental Science, Institute of Marine Microbes and Ecospheres, College of Ocean and Earth Sciences, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China; Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China
Chen He: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18 Fuxue Road, Changping District, Beijing 102249, China
Ruanhong Cai: State Key Laboratory for Marine Environmental Science, Institute of Marine Microbes and Ecospheres, College of Ocean and Earth Sciences, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China; Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China
Jinxin Xu: State Key Laboratory for Marine Environmental Science, Institute of Marine Microbes and Ecospheres, College of Ocean and Earth Sciences, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China; Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China
Yimeng Wang: State Key Laboratory for Marine Environmental Science, Institute of Marine Microbes and Ecospheres, College of Ocean and Earth Sciences, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China; Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China
Dapeng Xu: State Key Laboratory for Marine Environmental Science, Institute of Marine Microbes and Ecospheres, College of Ocean and Earth Sciences, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China; Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China
Jia Sun: State Key Laboratory for Marine Environmental Science, Institute of Marine Microbes and Ecospheres, College of Ocean and Earth Sciences, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China; Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China
Ting Zhang: State Key Laboratory for Marine Environmental Science, Institute of Marine Microbes and Ecospheres, College of Ocean and Earth Sciences, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China; Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China
Quan Shi: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18 Fuxue Road, Changping District, Beijing 102249, China
Nianzhi Jiao: State Key Laboratory for Marine Environmental Science, Institute of Marine Microbes and Ecospheres, College of Ocean and Earth Sciences, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China; Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China
Qiang Zheng: State Key Laboratory for Marine Environmental Science, Institute of Marine Microbes and Ecospheres, College of Ocean and Earth Sciences, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China; Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China; Corresponding author at: State Key Laboratory for Marine Environmental Science, Institute of Marine Microbes and Ecospheres, College of Ocean and Earth Sciences, Xiamen University, Xiang’an Campus, Xiang’an South Road, Xiamen 361102, China.

Journal volume & issue: Vol. 154
p. 106558

Abstract

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Dissolved organic matter (DOM) changes in quantity and quality over time and space, especially in highly dynamic coastal estuaries. Bacterioplankton usually display seasonal and spatial variations in abundance and composition in the coastal regions, and influence the DOM pool via assimilation, transformation and release of organic molecules. The change in DOM can also affect the composition of bacterial community. However, little is known on the correspondence between DOM molecules and bacterial composition, particularly through a systematic field survey. In this study, the spatiotemporal signatures of microbial communities and DOM composition in the subtropical coastal estuary of Xiamen are investigated over one and half years. The co-occurrence analysis between bacteria and DOM suggested microorganisms likely transformed the DOM from a relatively high (>400 Da) to a low (<400 Da) molecular weight, corresponding to an apparent increase in overall aromaticity. This might be the reason why microbial transformation renders “dark” organic matter visible in mass spectrometry due to more efficient ionization of microbial metabolites, as well as photodegradation processes. K- and r-strategists exhibited different correlations with two-size categories of DOM molecules owing to their different lifestyles and responses to environmental nutrient conditions. A comparison of the environmental variables and DOM composition with the microbial communities showed that the environmental/DOM variations played a more important role in shaping the microbial communities than vice versa. This study sheds light on the interactions between microbial populations and DOM molecules at the spatiotemporal scale, improving our understanding of microbial roles in marine biogeochemical cycles.

Published in Environment International

ISSN: 0160-4120 (Print)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Geography. Anthropology. Recreation: Environmental sciences
Website: https://www.journals.elsevier.com/environment-international

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