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热带海洋学报

• • 上一篇    

茅尾海沉积物生源要素分布特征及污染评价*

王泽宇1, 鲁栋梁1, 2, 3*, 周姣娣1, 2*, 金竹灵1, 陆金凤1, 李晨阳1
  

  1. 1. 北部湾大学, 海洋学院, 广西 钦州 535011;

    2. 北部湾大学, 广西海洋环境灾害过程与生态保护技术重点实验室, 广西 钦州 535011;

    3. 北部湾大学, 平陆运河河口海湾生态系统广西野外科学观测研究站, 广西 钦州 535011



  • 收稿日期:2025-10-16 修回日期:2025-12-15 接受日期:2025-12-19
  • 通讯作者: 鲁栋梁
  • 基金资助:

    广西自然科学基金项目(桂科LT2504240009, 2025GXNSFDA02850005); 国家自然科学基金项目(41966002, 42166002); 广西北部湾海洋灾害研究重点实验室自主项目(2023ZZ01)和开放课题(2020KF02); 国家基金委-共享航次计划2023年度北部湾科学考察实验研究(航次编号：NORC2024-11)项目(42349911); 广西北部湾海洋生态环境野外观测研究站科研能力建设项目(桂科 230267271)

Distribution characteristics and pollution assessment of biogenic elements in sediments of Maowei Sea*

WANG Zeyu1, LU Dongliang1, 2, 3*,ZHOU Jiaodi1, 2*, JIN Zhuling1, LU Jinfeng1, LI Chenyang1   

  1. 1. College of Marine Sciences, Beibu Gulf University, Qinzhou, 535011, China;

    2. Guangxi Key Laboratory of Marine Environmental Disaster Processes and Ecological Protection Technology, Beibu Gulf University, Qinzhou 535011, China;

    3. Pinglu Canal and Beibu Gulf Coastal Ecosystem Observation and Research Station of Guangxi, Beibu Gulf University, Qinzhou 535011, China



  • Received:2025-10-16 Revised:2025-12-15 Accepted:2025-12-19
  • Supported by:

    Guangxi Natural Science Foundation(2021GXNSFDA075004, 2025GXNSFDA02850005); National Natural Science Foundation of China(41966002, 42166002); Guangxi Key Laboratory of Marine Environmental Change and Disaster inBeibu Gulf, Independent Project (2023ZZ201) and Open Topic (2020KF02); Experimental Research on Beibu Gulf Scientific Expedition 2023 under the National Natural Science Foundation of China-Shared Voyage Program(Voyage No: NORC2024-11)Proiect(42349911); Guangxi Beibu Gulf Marine Ecological Environment Field Observation and Research Station(23026271)

    Corresponding author: LU Dongliang. email: ldl@bbgu.edu.cn; ZHOU Jiaodi. emai: Zhoujodie@bbgu.edu.cn

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摘要： 本文基于2024年7月(丰水期)和12月(枯水期)对茅尾海16个站位表层沉积物样品调查与分析, 通过综合污染指数法和有机污染指数法评价其污染状况。结果表明：丰水期TOC(total organic carbon)、TN(total nitrogen)、TP(total phosphorus)、BSi(biogenic silica)的质量分数范围分别为0.296%~0.953%、0.010%~0.112%、0.027%~0.155%、0.291%~0.520%；枯水期其质量分数范围分别为0.038%~1.487%、0.004%~0.127%、0.016%~0.113%、0.089%~0.982%。枯水期TOC、TN和BSi含量高于丰水期, 而TP无显著性季节差异, 生源要素含量整体从河口到外湾呈递减趋势。TOC/TN比值显示, 丰水期有机质来源于海陆混合输入, 枯水期则以陆源输入为主。生源要素的分布受沉积物粒度与含水率影响显著(P<0.05), 枯水期Chl-a(chlorophyll a)与TP呈显著性相关(P<0.01)。污染评价表明, 整体TN为轻度污染, TP中度污染, 主要位于茅岭江和钦江的河口区域,无有机污染。本研究结果为平陆运河工程建设期间茅尾海底质生态环境的监控与风险管理提供科学依据。 关键词：表层沉积物；生源要素；污染评价；时空分布；茅尾海

关键词: 表层沉积物, 生源要素, 污染评价, 时空分布, 茅尾海

Abstract: This study is based on the investigation and analysis of surface sediment samples collected from 16 sampling stations in Maowei Sea in July 2024 (wet season) and December 2024 (dry season). The pollution status of the sediments was evaluated using the comprehensive pollution index method and the organic pollution index method. The results show that: in the wet season, the mass fraction ranges of total organic carbon (TOC), total nitrogen (TN), total phosphorus (TP), and biogenic silica (BSi) are 0.296%~0.953%, 0.010%~0.112%, 0.027%~0.155%, and 0.291%~0.520%, respectively; in the dry season, their mass fraction ranges are 0.038%~1.487%, 0.004%~0.127%, 0.016%~0.113%, and 0.089%~0.982%, respectively.In the dry season, the contents of TOC, TN, and BSi were higher than those in the wet season, while TP showed no significant seasonal difference. Generally, the contents of biogenic elements exhibited a decreasing trend from the estuaries to the outer bay. The TOC/TN ratio indicated that the organic matter in the wet season originated from mixed terrestrial and marine inputs, whereas it was dominated by terrestrial inputs in the dry season. The distribution of biogenic elements was significantly affected by sediment grain size and moisture content (P < 0.05). In the dry season, chlorophyll a(Chl-a) was significantly correlated with TP (P < 0.01). Pollution assessment revealed that overall, TN was at the slight pollution level and TP at the moderate pollution level, with these polluted areas mainly distributed in the estuarine regions of the Maoling River and Qin River; no organic pollution was detected. The results of this study provide a scientific basis for the monitoring and risk management of the sediment ecological environment in Maowei Sea during the construction of the Pinglu Canal Project.

Key words: Surface sediments, Biogenic elements, Pollution assessment, Spatiotemporal distribution, Maowei Sea