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热带海洋学报

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南海北部钦州湾茅尾海溶解碳水化合物的分布特征及影响因素

曾德斌1, 彭光煜2, 杨  斌1,3*, 莫小荣1, 周姣娣1,4, 黄海方1, 颜婷婷1


基金项目: 国家自然科学基金项目(42166002); 江苏省自然科学基金项目(BK20241962); 广西北部湾海洋环境变化与灾害研究重点实验室(北部湾大学)开放课题(2024KF01); 北部湾大学海洋科学一流学科(TRB002); 连云港市科技计划项目(JCYJ2313)

作者简介: 曾德斌(2001-), 男, 广西南宁人, 研究方向为海洋生物地球化学。email: 2368161350@qq.com

通信作者: 杨斌。email: binyang@jou.edu.cn

Foundation item: National Natural Science Foundation of China (42166002); Jiangsu Provincial Natural Science Foundation of China (BK20241962); Guangxi Key Laboratory of Marine Environmental Change and Disaster in Beibu Gulf, Beibu Gulf University (2024KF01); Marine Science First-Class Subject, Beibu Gulf University (TRB002); Lianyungang Science and Technology Plan Program (JCYJ2313)

Corresponding author: YANG Bin. email: binyang@jou.edu.cn

  

  1. 1. 广西北部湾海洋环境变化与灾害研究重点实验室, 北部湾大学, 广西 钦州  535011;

    2. 江苏师范大学地理测绘与城乡规划学院, 江苏 徐州 221116;

    3. 江苏省海洋生物资源与环境重点实验室, 江苏海洋大学, 江苏 连云港 222005;

    4. 广西南海珊瑚礁研究重点实验室, 广西大学, 广西 南宁  530004

  • 收稿日期:2024-09-09 修回日期:2024-10-11 接受日期:2024-10-16
  • 通讯作者: 杨斌
  • 基金资助:
    国家自然科学基金项目(42166002); 江苏省自然科学基金项目(BK20241962); 广西北部湾海洋环境变化与灾害研究重点实验室(北部湾大学)开放课题(2024KF01); 北部湾大学海洋科学一流学科(TRB002); 连云港市科技计划项目(JCYJ2313)

Distribution characteristics of dissolved carbohydrates and its influence factors in the Maowei Sea of Qinzhou Bay, northern South China Sea

ZENG Debin1, PENG Guangyu2, YANG Bin1,3*, MO Xiaorong1, ZHOU Jiaodi1,4, HUANG Haifang1, YAN Tingting1   

  1. 1. Guangxi Key Laboratory of Marine Environmental Change and Disaster in Beibu Gulf, Beibu Gulf University, Qinzhou 535011, China;

    2. School of Geography, Geomatics and Planning, Jiangsu Normal University, Xuzhou 221116, China;

    3. Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang 222005, China;

    4. Guangxi Laboratory on the Study of Coral Reels in the South China Sea, Guangxi University, Nanning 530004, China

  • Received:2024-09-09 Revised:2024-10-11 Accepted:2024-10-16
  • Supported by:

    National Natural Science Foundation of China (42166002); Jiangsu Provincial Natural Science Foundation of China (BK20241962); Guangxi Key Laboratory of Marine Environmental Change and Disaster in Beibu Gulf, Beibu Gulf University (2024KF01); Marine Science First-Class Subject, Beibu Gulf University (TRB002); Lianyungang Science and Technology Plan Program (JCYJ2313)

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摘要： 采用TPTZ (2,4,6-三吡啶-s-三嗪，C18H12N6 )方法对2021年12月茅尾海表、底层海水中溶解态单糖（MCHO）、多糖（PCHO）和总糖（TCHO）浓度进行测定，并对其分布特征及影响因素进行了研究。结果表明，茅尾海MCHO、PCHO和TCHO平均浓度及范围分别为15.15 (2.40~38.40)、13.19 (3.92~38.40)和28.34 (11.52~76.80) μmol C·L -1。TCHO占溶解有机碳(DOC)浓度平均比例为40.2 ± 10.8%，表明TCHO是DOC的重要组成部分。MCHO占TCHO的浓度平均比例为52.9 ± 12.2%，表明MCHO是TCHO的主要存在形式。茅尾海表、底层MCHO、PCHO和TCHO浓度水平分布均呈现由河口向外海逐渐递减的趋势。表层MCHO、PCHO和TCHO与盐度呈显著负相关(p< 0.01)，与叶绿素a(Chl-a)呈显著正相关(p< 0.05)；底层MCHO和TCHO与盐度呈显著负相关（p< 0.01），TCHO与Chl-a呈显著正相关（p< 0.05），表明陆源输入和浮游植物自生产是控制冬季茅尾海溶解碳水化合物分布的主要影响因素。

关键词: 溶解有机碳, 溶解碳水化合物, 分布特征, 影响因素, 茅尾海

Abstract: The concentrations of dissolved monosaccharides (MCHO), polysaccharides (PCHO), and total carbohydrates (TCHO) in surface and bottom seawater of the Maowei Sea in December 2021 were determined by 2,4,6-tripyridyl-s-triazine (TPTZ) method, and their distribution characteristics and influence factors were studied. The results showed that average (range) concentration of MCHO, PCHO and TCHO in the Maowei Sea were 15.15 (2.40~38.40), 13.19 (3.92~38.40) and 28.34 (11.52~76.80) μmol C·L -1, respectively. The average proportion of TCHO in dissolved organic carbon (DOC) was 40.2 ± 10.8%, suggesting that TCHO was an important component of DOC. The average proportion of MCHO in TCHO was 52.9 ± 12.2%, indicating that MCHO was the main form of TCHO. The horizontal distributions of MCHO, PCHO, and TCHO both in surface and bottom seawater displayed a decreasing trend from the river mouth to offshore. The concentrations of MCHO, PCHO, and TCHO were negatively correlated with salinity (p < 0.01), and positively correlated with chlorophyll a (Chl-a) in the surface seawater. The concentrations of MCHO and TCHO were negatively correlated with salinity (p < 0.01), while TCHO was positively correlated with Chl- a in the bottom seawater, suggesting that terrestrial inputs and biogeochemical processes were the main factor affecting the distribution of dissolved carbohydrates in the Maowei Sea during winter.

Key words: Dissolved organic carbon, dissolved carbohydrates, distribution characteristics, influence factor, Maowei Sea