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Scallop farming impacts on dissolved organic matter cycling in coastal waters: Regulation of the low molecular weight fraction

文献类型：期刊论文

作者Wang, Bin1,2,3; Gao, Xuelu1,2,3,4; Liu, Yongliang1,3,4,5; Sun, Xiyan1,3,4,5; Zhao, Jianmin1,2,4; Xing, Qianguo1,2,4; Yang, Yuwei1,2
刊名MARINE ENVIRONMENTAL RESEARCH
出版日期2024-11-01
卷号202页码:14
关键词Coastal hypoxia Marine carbon cycle Bay scallop cultivation Absorption and fluorescence spectroscopy Low molecular weight dissolved organic matter
ISSN号0141-1136
DOI10.1016/j.marenvres.2024.106796
通讯作者Gao, Xuelu(xlgao@yic.ac.cn)
英文摘要To elucidate the impacts of scallop farming on the biogeochemical characteristics of low molecular weight (LMW, <1 kDa) dissolved organic matter (DOM), samples collected from a bay scallop mariculture area (MA) and its surrounding areas were determined for absorption and fluorescence spectroscopy after microfiltration and centrifugal ultrafiltration. The values of absorption coefficient a(350) showed a spatial variation trend of inshore area (IA) > MA > non-mariculture area (NMA) for both bulk (<0.7 mu m) and LMW fractions. Four fluorescent components, namely two protein-like components (tryptophan-like C1 and tyrosine-like C2) and two humic-like components (microbial humic-like C3 and terrestrial humic-like C4), were identified. Scallop farming influenced DOM transformation by altering phytoplankton abundance and promoting microbial degradation. In July, the net contributions of phytoplankton to the spectroscopy parameters of LMW-DOM in the surface seawater were 11.0% for a(350), 4.3% for C1, 0.8% for C2, 0.6% for C3 and 3.0% for C4, respectively; the corresponding values of bulk DOM in the surface seawater were 24.3% for a(350), 20.1% for C1, 5.9% for C2, 2.0% for C3, 2.9% for C4, respectively. Compared with NMA, the contributions of microbial degradation to a(350) in MA's surface seawater increased by 9.0% for LMW-DOM and 6.9% for bulk DOM in July; however, the effects on different fluorescent components varied. In August, compared with NMA, the contributions of microbial degradation to spectroscopy parameters in the bottom water of MA decreased by 35.7% for a(350), 6.3% for C2, 1.3% for C3, and 4.4% for C4 for LMW-DOM fraction; for bulk DOM, the corresponding contribution decreased by 10.8% for C1. These variations indicate that protein-like substances from scallop aquaculture are easily degraded into LMW substances, while humic-like substances degradation diminishes over time.
WOS关键词PARALLEL FACTOR-ANALYSIS ; FLUORESCENCE ; DYNAMICS ; SIZE ; SEA ; NUTRIENTS ; CARBON ; BAY ; ECOSYSTEM ; CHINA
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Toxicology
语种英语
WOS记录号WOS:001340474400001
资助机构Seed project of Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences
源URL[http://ir.yic.ac.cn/handle/133337/37796]  
专题烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
烟台海岸带研究所_海岸带信息集成与综合管理实验室
通讯作者Gao, Xuelu
作者单位1.Chinese Acad Sci, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai Inst Coastal Zone Res, Yantai 264003, Shandong, Peoples R China
2.Shandong Key Lab Coastal Environm Proc, Yantai 264003, Shandong, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Shandong, Peoples R China
5.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Muping Coastal Environm Res Stn, Yantai 264003, Shandong, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Bin,Gao, Xuelu,Liu, Yongliang,et al. Scallop farming impacts on dissolved organic matter cycling in coastal waters: Regulation of the low molecular weight fraction[J]. MARINE ENVIRONMENTAL RESEARCH,2024,202:14.
APA Wang, Bin.,Gao, Xuelu.,Liu, Yongliang.,Sun, Xiyan.,Zhao, Jianmin.,...&Yang, Yuwei.(2024).Scallop farming impacts on dissolved organic matter cycling in coastal waters: Regulation of the low molecular weight fraction.MARINE ENVIRONMENTAL RESEARCH,202,14.
MLA Wang, Bin,et al."Scallop farming impacts on dissolved organic matter cycling in coastal waters: Regulation of the low molecular weight fraction".MARINE ENVIRONMENTAL RESEARCH 202(2024):14.

入库方式： OAI收割

来源：烟台海岸带研究所

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