Lake reclamation alters molecular-level characteristics of lacustrine dissolved organic matter – A study of nine lakes in the Yangtze Plain, China

Ye，Quan Hui1,2,3; Sun，Guo Dong1,2; Wang，Ying Hui1,2; Zhang，Song1,2; Xu，Yang1,2; Feng，Lian1,2; Simpson，Myrna J.4; He，Chen5; Shi，Quan5; Li，Li Ping6; Wang，Jun Jian1,2

2022-08-15

10.1016/j.watres.2022.118884

WATER RESEARCH   Impact Factor & Quartile

0043-1354

1879-2448

In recent decades, the reclamation of lakes has captured 42% of the total lake area of the Yangtze Plain in China and introduced additional pressure on lacustrine water quality. While lacustrine dissolved organic matter (DOM) is critical in regulating biogeochemical processing and aquatic biodiversity, the impact of reclamation on the molecular-level characteristics of lacustrine DOM remains unexplored. Here, the DOM characteristics altered by reclamation practices in the Yangtze Plain lakes were investigated using fluorescence spectroscopy, nuclear magnetic resonance spectroscopy, and Fourier transform ion cyclotron resonance mass spectrometry. Results demonstrated that reclamation not only elevated the quantity (on average +32%) but also altered the characteristics and composition of lacustrine DOM. Compared to the natural water sites close by, reclamation sites did not significantly alter the DOM aromaticity but significantly lowered the average molecular weight and increased the biolability of DOM. The chromophoric DOM and humic-like fluorescent components were remarkably elevated, but not the protein-like fluorescent components. More lipid-like and condensed aromatic-like components were detected in the lacustrine DOM as compared to the lignin-like, carbohydrate-like, and protein-like components, which may be driven by the increased microbial processing. Overall, the significant alteration in characteristics and composition of lacustrine DOM highlights the potential impact of reclamation on the DOM biogeochemical cycle and the environmental quality in aquatic ecosystems.

1H nuclear magnetic resonance (NMR) spectroscopy Characteristics and composition Fourier transform ion cyclotron resonance mass spectrometry Lacustrine dissolved organic matter (DOM) Lake reclamation

EI ; SCI

English

NI Journal Papers

First

National Natural Science Foundation of China["42192513","42122054","41807360"] ; Shenzhen Science and Tech-nology Innovation Commission["JCYJ20190809142611503","20200925155227003"] ; Guangdong Basic and Applied Basic Research Foundation[2021B1515020082] ; Key Platform and Scientific Research Projects of Guangdong Provincial Education Department["2019KZDXM028","2020KCXTD006"] ; National Key Research and Development Project of China[2021YFC3101700] ; Major Scientific and Technological Innovation Projects of Shandong Province[2021CXGC011201]

Engineering ; Environmental Sciences & Ecology ; Water Resources

Engineering, Environmental ; Environmental Sciences ; Water Resources

WOS:000878583900007

PERGAMON-ELSEVIER SCIENCE LTD

20223112453177

Aquatic ecosystems ; Aromatic compounds ; Biodiversity ; Biogeochemistry ; Cyclotrons ; Dissolution ; Electron cyclotron resonance ; Fluorescence ; Fluorescence spectroscopy ; Lakes ; Mass spectrometry ; Nuclear magnetic resonance ; Proteins ; Reclamation ; Water quality

Water Analysis:445.2 ; Environmental Engineering:454 ; Ecology and Ecosystems:454.3 ; Geochemistry:481.2 ; Light/Optics:741.1 ; Optical Devices and Systems:741.3 ; Chemistry:801 ; Biochemistry:801.2 ; Chemical Operations:802.3 ; Organic Compounds:804.1 ; Atomic and Molecular Physics:931.3 ; Particle Accelerators:932.1.1 ; Optical Instruments:941.3 ; Optical Variables Measurements:941.4

ENVIRONMENT/ECOLOGY

2-s2.0-85134988058

Scopus

1.Guangdong Key Laboratory of Soil and Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
2.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
3.Department of Civil and Environmental Engineering,University of Illinois at Urbana-Champaign,Urbana,61801,United States
4.Environmental NMR Centre and Department of Physical and Environmental Sciences,University of Toronto Scarborough,Toronto,1265 Military Trail,M1C 1A4,Canada
5.State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing,102249,China
6.Research and Development Center for Watershed Environmental Eco-Engineering,Advanced Institute of Natural Sciences,Beijing Normal University,Zhuhai,Guangdong,519087,China

Ye，Quan Hui,Sun，Guo Dong,Wang，Ying Hui,等. Lake reclamation alters molecular-level characteristics of lacustrine dissolved organic matter – A study of nine lakes in the Yangtze Plain, China[J]. WATER RESEARCH,2022,222.

Ye，Quan Hui.,Sun，Guo Dong.,Wang，Ying Hui.,Zhang，Song.,Xu，Yang.,...&Wang，Jun Jian.(2022).Lake reclamation alters molecular-level characteristics of lacustrine dissolved organic matter – A study of nine lakes in the Yangtze Plain, China.WATER RESEARCH,222.

Ye，Quan Hui,et al."Lake reclamation alters molecular-level characteristics of lacustrine dissolved organic matter – A study of nine lakes in the Yangtze Plain, China".WATER RESEARCH 222(2022).