| 摘要: |
| 铜(Cu)是海洋浮游植物生长不可或缺的痕量金属之一, 对海洋初级生产力起着关键作用。河流是海洋中Cu的重要来源, 河口及边缘海对河流输入的Cu起着重要的改造作用, 但目前对Cu在浙闽沿岸的生物地球化学行为尚不明确。本研究使用自动固相萃取-电感耦合等离子体联用技术对2021年11月浙闽沿岸及其邻近水域表层水的溶解态铜(dCu)浓度进行分析。结果显示，该区域dCu浓度范围为3.38~26.28 nmol·L-1, 平均浓度为11.66±5.83 nmol·L-1。在研究区域内, dCu的空间分布呈北高南低, 近岸高、远岸低的特征。此外, dCu在浙闽沿岸表现出较高的保守性, 其与盐度呈显著负相关关系, 表明dCu在一定程度上可用于指示人为影响。相关性分析表明, 浙闽沿岸及其邻近水域表层dCu的生物地球化学行为和分布可能受到陆源输入、水团输运混合、化学絮凝与吸附等过程的影响。本研究结果有助于进一步理解Cu在海洋中的生物地球化学过程, 为探究该区域的生态环境变化提供科学依据。 |
| 关键词: 浙闽沿岸 溶解态铜 盐度 水域 人为影响 |
| DOI：10.11759/hykx20230326001 |
| 分类号: |
| 基金项目:国家自然科学基金委重大项目课题“海洋荒漠区常量和微量营养物质的来源、通量及其时空分布格局”(41890801) |
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| Distributions and controlling factors of dissolved Copper in the Zhe-Min coastal region in autumn |
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RUAN Ya-qing1, ZHANG Rui-feng1,2
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1.School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China;2.Key Laboratory of Polar Science, Ministry of Natural Resources, Polar Research Institute of China, Shanghai 200136, China
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| Abstract: |
| Copper (Cu) is an essential trace metal for marine phytoplankton and plays a critical role in primary marine productivity. Rivers are an important source of Cu for the ocean, and estuaries and marginal seas play an important role in modifying the transport of riverine Cu to oceans. However, the biogeochemical behavior of Cu in the Zhe-Min coastal region is not yet fully understood. This study aims to investigate dissolved Cu (dCu) concentrations and spatial distribution in the surface waters of the Zhe-Min coastal region and adjacent waters in November 2021 using automatic solid phase extraction coupled with inductively coupled plasma technology. The results show that the dCu concentrations ranged from 3.38 to 26.28 nmol·L-1, with an average dCu concentration of 11.66±5.83 nmol·L-1. The spatial distribution of dCu was higher in the north and lower in the south, higher near the shore, and lower far from the shore. Further, dCu exhibited highly conservative behavior in the Zhe-Min coastal region and exhibited a significantly negative correlation with salinity, indicating its potential use as an indicator of anthropogenic influence. Finally, correlation analysis showed that the biogeochemical behavior and distributions of dCu in the surface waters of the Zhe-Min coastal region and adjacent waters may be affected by terrigenous input, water mass mixing, chemical flocculation and adsorption, and other processes. These findings contribute to a better understanding of the biogeochemical processes of Cu in oceans and provide a scientific basis for exploring the ecological and environmental changes in the Zhe-Min coastal region. |
| Key words: Zhe-Min Coast copper, salinity water area anthropogenic influence |
