| 引用本文: | 吴峰,宋秀贤,池连宝,王文涛,俞志明.近海养殖水体溶解性有机质的荧光特征及环境指示意义.海洋与湖沼,2022,53(3):597-606. |
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| 近海养殖水体溶解性有机质的荧光特征及环境指示意义 |
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吴峰1,2,3,4, 宋秀贤1,2,3,4, 池连宝1,2,3, 王文涛1,2,3, 俞志明1,2,3,4
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1.中国科学院海洋研究所 海洋生态与环境科学重点实验室 山东青岛 266071;2.青岛海洋科学与技术试点国家实验室 海洋生态与环境科学功能实验室 山东青岛 266237;3.中国科学院大学 北京 100049;4.中国科学院海洋大科学研究中心 山东青岛 266071
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| 摘要: |
| 为探究近海养殖水体溶解性有机质(dissolved organic matter,DOM)的荧光特征及环境指示意义,以山东省东营市凡纳滨对虾池塘为研究对象,利用三维荧光光谱-平行因子分析(EEMs-PARAFAC)技术对2020年9月14日至10月17日凡纳滨对虾池塘养殖水体中DOM的荧光特征进行了分析,以期揭示其来源及环境指示意义。结果表明,养殖池水体DOM有4种荧光组分,包括1种类蛋白质物质(C4)和3种类腐殖酸物质(C1、C2与C3),前者作为养殖池水体DOM特有组分,且其荧光强度高于对照池各组分。养殖池水体DOM总荧光强度、总有机碳和溶解有机碳含量于采样时期均明显高于对照池。综合3种荧光指数(FI、BIX、HIX),对照池和养殖池水体DOM以内源输入为主,自生源特征明显。对照池和养殖池水体DOM组分与营养盐(氮、磷营养盐为主)具有显著相关性,表明DOM组分的产生与利用和营养盐的消耗与生成过程相耦合。养殖池DOM组分C1和C4与chl a呈显著正相关性,表明浮游藻类是养殖水体DOM类蛋白质和类腐殖酸物质的重要来源。该研究揭示了养殖水体有机质高度积累,对养殖环境的富营养化带来潜在威胁,同时为进一步揭示养殖水体DOM的光化学性质提供了科学依据。 |
| 关键词: 溶解性有机质 三维荧光 荧光特征 环境指示意义 |
| DOI：10.11693/hyhz20211100272 |
| 分类号: |
| 基金项目:山东省重大科技创新工程项目,2019JZZY010808号;国家自然科学基金项目,42006119号;国家自然科学基金项目,41976148号;2019年度“泰山学者攀登计划”资助项目. |
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| FLUORESCENCE CHARACTERISTICS OF DISSOLVED ORGANIC MATTER IN OFFSHORE AQUACULTURE WATER AND ITS ENVIRONMENTAL SIGNIFICANCE |
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WU Feng1,2,3,4, SONG Xiu-Xian1,2,3,4, CHI Lian-Bao1,2,3, WANG Wen-Tao1,2,3, YU Zhi-Ming1,2,3,4
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1.CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2.Laboratory of Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China;3.University of Chinese Academy of Sciences, Beijing 100049, China;4.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
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| Abstract: |
| To explore the fluorescence characteristics and environmental indication significance of dissolved organic matter (DOM) in offshore aquaculture water body, Litopenaeus vannamei pond in Dongying City, Shandong Province was chosen as the research object, for which three-dimensional fluorescence spectrum parallel factor analysis (EEMs-PARAFAC) technology was used to analyze the dissolved organic matter (DOM) in Litopenaeus vannamei pond aquaculture water body from September 14 to October 17, 2020, and to reveal the source and environmental indicative significance of DOM. The DOM in the aquaculture pond water was consisted of four fluorescent components, including one type of protein (C4) and three types of humic acid (C1, C2, and C3). The former is a unique component of DOM in the aquaculture pond water, and its fluorescence intensity is higher than that in the control pond water. The content of organic matter (OM) in the aquaculture pond was higher as indicated by the observed significantly higher total fluorescence intensity of DOM and the contents of TOC and DOC in the aquaculture pond, than those in the control pond during the sampling period. Based on the three fluorescence indexes (FI, BIX, and HIX), the DOM in the control pond and aquaculture pond is mainly endogenous input, and the characteristics of endogenous source are obvious. The DOM components in both control and aquaculture pond had significant correlations with NO2-、 NO3-、 PO43-, indicating the coupling between the generation / utilization of DOM components and the consumption/generation of nutrients. In addition, there was a significant positive correlation between chl a and DOM components C1 and C4, which indicated that the phytoplankton was an important source of DOM proteins and humic acids in aquaculture pond water. This study reveals that the high accumulation of organic matter in aquaculture water brings a potential threat to the eutrophication of aquaculture environment, and provides a scientific basis for further revealing the photochemical properties of DOM in aquaculture water. |
| Key words: dissolved organic matter three dimensional fluorescence fluorescence characteristics environmental significance |
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