中文版 | English
Title

Tidal Pumping Controls Dissolved Organic Matter Properties and Outwelling From Mangrove Groundwater to Coastal Water

Author
Corresponding AuthorWang, Jun-Jian; Li, Hailong
Publication Years
2023-03-01
DOI
Source Title
ISSN
0043-1397
EISSN
1944-7973
Volume59Issue:3
Abstract
Dissolved organic matter (DOM) in highly productive intertidal mangroves is an important carbon and nutrient source to the coastal ocean. In highly dynamic mangrove intertidal systems, both tidal pumping or geochemical factors can control DOM characteristics. The influence of groundwater flow on DOM properties and fluxes remains poorly understood. Here, we compared the concentrations, sources, and spectroscopic characteristics of DOM across a recharge-discharge gradient. We used a three-dimensional array sampling strategy to reduce spatial biases, groundwater monitoring to quantify tidally driven exchange, and spectrofluoroscopy to quantify DOM fluorescent components. The results showed that tidal hydrology played the key role driving groundwater DOM properties in both horizontal (i.e., from the mangrove to the sea) and vertical directions. Due to the high spatial heterogeneity of dissolved inorganic (DIC) and organic (DOC) carbon concentrations in mangrove groundwater, carbon outwelling showed a high degree of variability at the intertidal scale (54.8-234.8 mu mol m(-2) d(-1) for DIC and 2.5-12.4 mu mol m(-2) d(-1) for DOC). The contribution of terrestrial DOM gradually decreased toward the ocean, but the microbial contributions for recently produced autochthonous DOM increased. Deep groundwater received less terrestrial DOM and experienced anaerobic microbial mineralization, resulting in lower organic carbon than shallow groundwater. Greater variations in spectroscopic characteristics were found in shallow groundwater than in deep groundwater. Overall, tidally driven surface water-groundwater interactions control the variability in DOM properties and how DOM contributes to carbon budgets and sequestration in mangrove groundwater.
Keywords
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
First ; Corresponding
Funding Project
National Natural Science Foundation of China["42177046","41972260","42122054"] ; GuangDong Basic and Applied Basic Research Foundation[2022A1515010572] ; Science, Technology, and Innovation Commission of Shenzhen["JSGG20210802153535002","20200925174525002"]
WOS Research Area
Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
WOS Subject
Environmental Sciences ; Limnology ; Water Resources
WOS Accession No
WOS:000949219200001
Publisher
ESI Research Field
ENVIRONMENT/ECOLOGY
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/523926
DepartmentSchool of Environmental Science and Engineering
Affiliation
1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, State Environm Protect Key Lab Integrated Surface, Shenzhen, Peoples R China
2.Southern Univ Sci & Technol, Guangdong Prov Key Lab Soil & Groundwater Pollut C, Shenzhen, Peoples R China
3.Univ Gothenburg, Dept Marine Sci, Gothenburg, Sweden
First Author AffilicationSchool of Environmental Science and Engineering;  Southern University of Science and Technology
Corresponding Author AffilicationSchool of Environmental Science and Engineering;  Southern University of Science and Technology;  
First Author's First AffilicationSchool of Environmental Science and Engineering
Recommended Citation
GB/T 7714
Xiao, Kai,Zhang, Peng,Santos, Isaac R.,et al. Tidal Pumping Controls Dissolved Organic Matter Properties and Outwelling From Mangrove Groundwater to Coastal Water[J]. WATER RESOURCES RESEARCH,2023,59(3).
APA
Xiao, Kai.,Zhang, Peng.,Santos, Isaac R..,Wang, Jun-Jian.,Li, Zhenyang.,...&Li, Hailong.(2023).Tidal Pumping Controls Dissolved Organic Matter Properties and Outwelling From Mangrove Groundwater to Coastal Water.WATER RESOURCES RESEARCH,59(3).
MLA
Xiao, Kai,et al."Tidal Pumping Controls Dissolved Organic Matter Properties and Outwelling From Mangrove Groundwater to Coastal Water".WATER RESOURCES RESEARCH 59.3(2023).
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