南海北部钦州湾大风江口海域溶解碳水化合物的分布特征及影响因素

doi:10.11978/2025146

Abstract

Abstract:

The concentrations of dissolved monosaccharides (MCHO), polysaccharides (PCHO), and total carbohydrates (TCHO) were determined using the 2, 4, 6-tripyridyl-s-triazine (TPTZ) method in the Dafengjiang River Estuary (DRE) during July 2022, and their distribution characteristics and influencing factors were examined. The results showed that the average concentrations of MCHO, PCHO, and TCHO in the surface seawater of the DRE were (24.78±12.72), (14.75±3.66), and (39.53±12.87) μmol C·L^-1, respectively, with corresponding ranges of 8.52−43.71, 9.96−21.01, and 19.54−61.72 μmol C·L^-1. TCHO accounted for an average of (52.8 ± 17.3)% of the dissolved organic carbon (DOC) concentration, indicating that TCHO was a significant component of DOC in the study area. MCHO contributed an average of (59.1 ± 15.5)% to TCHO, suggesting that MCHO was the dominant form of TCHO. The concentrations of MCHO and TCHO exhibited a gradual decreasing trend along the river-estuary-bay continuum, while PCHO showed the opposite distribution pattern. Both MCHO and TCHO concentrations were significantly negatively correlated with salinity (P<0.01), indicating that terrestrial inputs and physical dilution processes were key factors controlling the distribution of dissolved carbohydrates in the DRE. The high-value areas of PCHO coincided with those of chlorophyll-a (Chl-a) concentrations, indicating that the distribution of PCHO concentrations might be mainly regulated by in situ production and other biological processes of phytoplankton. This study provides baseline data on dissolved carbohydrates in the river-estuary-bay continuum of the Qinzhou Bay prior to the construction of the Pinglu Canal, a mega project. These findings are of great significance for deepening our understanding of coastal carbon cycling processes and their mechanisms in the Beibu Gulf of Guangxi.

Key words: dissolved carbohydrates, dissolved organic carbon, distribution characteristics, influencing factors, Dafengjiang River Estuary

CLC Number:

P734

ZENG Debin, KANG Zhenjun, YANG Bin, ZHOU Jiaodi, LU Dongliang, HUANG Haifang, YAN Tingting. Distribution characteristics of dissolved carbohydrates and their influencing factors in the Dafengjiang River Estuary (Qinzhou Bay, northern South China Sea)[J].Journal of Tropical Oceanography, 2026, 45(4): 179-189.

Figures/Tables 8

Fig. 1

Fig. 2

Tab. 1

Fig. 3

Tab. 2

Fig. 4

Fig. 5

Fig. 6

References 53

[1]	龚词, 杨桂朋, 2017. 夏季南海北部溶解碳水化合物浓度分布[J]. 海洋环境科学, 36(3): 321-327.
	Gong Ci, Yang Guipeng, 2017. Distributions of dissolved carbohydrates in the northern South China Sea during summer[J]. Marine Environmental Science, 36(3): 321-327 (in Chinese with English abstract).
[2]	胡春, 陈岩, 杨桂朋, 等, 2019. 2017年春季黄东海碳水化合物的分布特征[J]. 海洋环境科学, 38(6): 848-855.
	Hu Chun, Chen Yan, Yang Guipeng, et al, 2019. Study on the distribution of dissolved carbohydrates in the South Yellow Sea and the East China Sea during spring[J]. Marine Environmental Science, 38(6): 848-855 (in Chinese with English abstract).
[3]	黄慧倩, 胡浩鹏, 杨斌, 等, 2023. 亚热带海湾表层沉积物对磷的吸附解析特征研究[J]. 环境科学研究, 36(2): 363-372.
	Huang Huiqian, Hu Haopeng, Yang Bin, et al, 2023. Phosphate adsorption and desorption characteristics of surface sediments of subtropical bay[J]. Research of Environmental Sciences, 36(2): 363-372 (in Chinese with English abstract).
[4]	黄星, 梁绍信, 陶玉华, 等, 2021. 北部湾大风江口互花米草湿地有机碳储量的分布特征[J]. 广西植物, 41(6): 853-861.
	Huang Xing, Liang Shaoxin, Tao Yuhua, et al, 2021. Distribution characteristics of organic carbon stocks of Spartina alterniflora in Dafeng River Estuary, Beibu Gulf[J]. Guihaia, 41(6): 853-861 (in Chinese with English abstract).
[5]	罗亚飞, 黄海军, 严立文, 等, 2015. 基于遥感方法的大风江口悬浮体时空分布及扩散特征研究[J]. 海洋湖沼通报, (3): 14-20.
	Luo Yafei, Huang Haijun, Yan Liwen, et al, 2015. Distribution and diffusion of suspended matters based on remote sensing in the Dafengjiang Estuary[J]. Transactions of Oceanology and Limnology, (3): 14-20 (in Chinese with English abstract).
[6]	王日明, 戴志军, 黄鹄, 等, 2020. 北部湾大风江与南流江河口红树林空间分布格局研究[J]. 海洋学报(中文版), 42(12): 54-61.
	Wang Riming, Dai Zhijun, Huang Hu, et al, 2020. Spatial patterns of the mangrove along the riverine estuaries, Nanliujiang River and Dafengjiang River of the Beibu Gulf[J]. Acta Oceanologica Sinica, 42(12): 54-61 (in Chinese with English abstract).
[7]	王毅梦, 吴冠伟, 杨桂朋, 等, 2013. 夏季黄、渤海溶解碳水化合物的浓度分布[J]. 海洋环境科学, 32(2): 227-234.
	Wang Yimeng, Wu Guanwei, Yang Guipeng, et al, 2013. Distributions of dissolved carbohydrates in the Bohai Sea and the Yellow Sea during summer[J]. Marine Environmental Science, 32(2): 227-234 (in Chinese with English abstract).
[8]	徐程, 杨斌, 朱雪菁, 等, 2020. 大风江口海域沉积物酸可挥发性硫化物、重金属分布及风险评价[J]. 环境科学研究, 33(6): 1530-1538.
	Xu Cheng, Yang Bin, Zhu Xuejing, et al, 2020. Distribution and risk assessment of acid volatile sulfide and heavy metals in sediments of Dafengjiang River Estuary[J]. Research of Environmental Sciences, 33(6): 1530-1538 (in Chinese with English abstract).
[9]	杨斌, 冯文慧, 周孝萱, 等, 2025a. 茅尾海入海河口区柱状沉积物对磷的吸附行为特征[J]. 渔业科学进展, 46(2): 53-63.
	Yang Bin, Feng Wenhui, Zhou Xiaoxuan, et al, 2025a. Adsorption behaviour characteristics of phosphorus in core sediments from the main estuaries of the Maowei Sea[J]. Progress in Fishery Sciences, 46(2): 53-63 (in Chinese with English abstract).
[10]	杨斌, 滕浩然, 纪云博, 等, 2025b. 南海北部茅尾海主要入海河口区沉积物有机磷形态分布特征[J]. 海洋科学进展, 43(2): 429-442.
	Yang Bin, Teng Haoran, Ji Yunbo, et al, 2025b. Distribution characteristics of organic phosphorus form in sediments from the main estuaries of the Maowei Sea, northern South China Sea[J]. Advances in Marine Science, 43(2): 429-442 (in Chinese with English abstract).
[11]	杨斌, 周姣娣, 王希龙, 等, 2022. 水体磷形态的动态变化机制: 以冬季北部湾大风江口为例[J]. 海洋学研究, 40(3): 109-119.
	Yang Bin, Zhou Jiaodi, Wang Xilong, et al, 2022. Dynamic change mechanism of phosphorus species in water: A case study of the Dafengjiang River Estuary in Beibu Gulf in winter[J]. Journal of Marine Sciences, 40(3): 109-119 (in Chinese with English abstract). doi: 10.3969-j.issn.1001-909X.2022.03.010
[12]	曾德斌, 彭光煜, 杨斌, 等, 2025. 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[J]. 热带海洋学报, 44(3): 197-205.
	Zeng Debin, Peng Guangyu, Yang Bin, et al, 2025. Distribution characteristics of dissolved carbohydrates and their influencing factors in the Maowei Sea, Qinzhou Bay, northern South China Sea[J]. Journal of Tropical Oceanography, 44(3): 197-205 (in Chinese with English abstract).
[13]	张正斌, 2004. 海洋化学[M]. 青岛: 中国海洋大学出版社.
	Zhang Zhengbin, 2004. Hai yang hua xue[M]. Qingdao: China Ocean University Press (in Chinese).
[14]	Alyuruk H, Kontas A, 2018. Seasonal variations and distributions of dissolved free and total carbohydrates at the İzmir Bay, Aegean Sea[J]. Acta Oceanologica Sinica, 37(8): 6-14. doi: 10.1007/s13131-018-1229-x
[15]	Baltar F, Zhao Zihao, Herndl G J, 2021. Potential and expression of carbohydrate utilization by marine fungi in the global ocean[J]. Microbiome, 9(1): 106. doi: 10.1186/s40168-021-01063-4 pmid: 33975640
[16]	Becker S, Tebben J, Coffinet S, et al, 2020. Laminarin is a major molecule in the marine carbon cycle[J]. Proceedings of the National Academy of Sciences of the United States of America, 117(12): 6599-6607. doi: 10.1073/pnas.1917001117 pmid: 32170018
[17]	Bhosle N B, Bhaskar P V, Ramachandran S, 1998. Abundance of dissolved polysaccharides in the oxygen minimum layer of the Northern Indian Ocean[J]. Marine Chemistry, 63(1-2): 171-182. doi: 10.1016/S0304-4203(98)00061-9
[18]	Cai Ruanhong, Jiao Nianzhi, 2023. Recalcitrant dissolved organic matter and its major production and removal processes in the ocean[J]. Deep Sea Research Part I: Oceanographic Research Papers, 191: 103922. doi: 10.1016/j.dsr.2022.103922
[19]	Giljan G, Arnosti C, Kirstein I V, et al, 2022. Strong seasonal differences of bacterial polysaccharide utilization in the North Sea over an annual cycle[J]. Environmental Microbiology, 24(5): 2333-2347. doi: 10.1111/1462-2920.15997 pmid: 35384240
[20]	He Zhen, Wang Qi, Yang Guipeng, et al, 2015. Spatiotemporal variation characteristics and related affecting factors of dissolved carbohydrates in the East China Sea[J]. Continental Shelf Research, 108: 12-24. doi: 10.1016/j.csr.2015.08.002
[21]	Hedges J I, Cowie G L, Richey J E, et al, 1994. Origins and processing of organic matter in the Amazon River as indicated by carbohydrates and amino acids[J]. Limnology and Oceanography, 39(4): 743-761. doi: 10.4319/lo.1994.39.4.0743
[22]	Hu Ang, Choi M, Tanentzap A J, et al, 2022. Ecological networks of dissolved organic matter and microorganisms under global change[J]. Nature Communications, 13: 3600. doi: 10.1038/s41467-022-31251-1 pmid: 35739132
[23]	Huang Haifang, Dan S F, Yang Bin, et al, 2023. Spatiotemporal distributions of poorly-bound heavy metals in surface sediments of a typical subtropical eutrophic estuary and adjacent bay[J]. Marine Environmental Research, 189: 106076. doi: 10.1016/j.marenvres.2023.106076
[24]	Huang Ying, Xu Cheng, Yang Bin, et al, 2025. Biogeochemistry of phosphorus species in water and sediments and sedimentary phosphorus release potential from a eutrophic estuary and adjacent bay[J]. Marine Environmental Research, 208: 107134. doi: 10.1016/j.marenvres.2025.107134
[25]	Hung C C, Tang Degui, Warnken K W, et al, 2001. Distributions of carbohydrates, including uronic acids, in estuarine waters of Galveston Bay[J]. Marine Chemistry, 73(3-4): 305-318. doi: 10.1016/S0304-4203(00)00114-6
[26]	Hung C C, Warnken K W, Santschi P H, 2005. A seasonal survey of carbohydrates and uronic acids in the Trinity River, Texas[J]. Organic Geochemistry, 36(3): 463-474. doi: 10.1016/j.orggeochem.2004.09.004
[27]	Kaiser K, Benner R, 2009. Biochemical composition and size distribution of organic matter at the Pacific and Atlantic time-series stations[J]. Marine Chemistry, 113(1-2): 63-77. doi: 10.1016/j.marchem.2008.12.004
[28]	Khodse V B, Bhosle N B, Prabhu Matondkar S G, 2010. Distribution of dissolved carbohydrates and uronic acids in a tropical estuary, India[J]. Journal of Earth System Science, 119(4): 519-530. doi: 10.1007/s12040-010-0029-2
[29]	Lin Peng, Guo Laodong, 2015. Spatial and vertical variability of dissolved carbohydrate species in the northern Gulf of Mexico following the Deepwater Horizon oil spill, 2010-2011[J]. Marine Chemistry, 174: 13-25. doi: 10.1016/j.marchem.2015.04.001
[30]	Lu Dongliang, Kang Zhenjun, Yang Bin, et al, 2020. Compositions and spatio-temporal distributions of different nitrogen species and lability of dissolved organic nitrogen from the Dafengjiang River to the Sanniang Bay, China[J]. Marine Pollution Bulletin, 156: 111205. doi: 10.1016/j.marpolbul.2020.111205
[31]	Marynowski L, Simoneit B R T, 2022. Saccharides in atmospheric particulate and sedimentary organic matter: Status overview and future perspectives[J]. Chemosphere, 288: 132376. doi: 10.1016/j.chemosphere.2021.132376
[32]	Morán X A G, Arandia-Gorostidi N, Huete-Stauffer T M, et al, 2023. Temperature enhances the functional diversity of dissolved organic matter utilization by coastal marine bacteria[J]. Environmental Microbiology Reports, 15(1): 31-37. doi: 10.1111/emi4.v15.1
[33]	Myklestad S M, Skånøy E, Hestmann S, 1997. A sensitive and rapid method for analysis of dissolved mono- and polysaccharides in seawater[J]. Marine Chemistry, 56(3-4): 279-286. doi: 10.1016/S0304-4203(96)00074-6
[34]	Parli B V, Sinha A K, Bhaskar J T, 2024. Dissolved carbohydrates and its influence on bacterioplankton diversity in the euphotic zone of Equatorial Indian Ocean during southwest monsoon[J]. Journal of Marine Systems, 244: 103974. doi: 10.1016/j.jmarsys.2024.103974
[35]	Parsons T R, Maita Y, Lalli C M, 1984. A manual of chemical and biological methods for seawater analysis[M]. Oxford: Pergamon Press.
[36]	Regnier P, Resplandy L, Najjar R G, et al, 2022. The land-to-ocean loops of the global carbon cycle[J]. Nature, 603(7901): 401-410. doi: 10.1038/s41586-021-04339-9
[37]	Sharp J H, Benner R, Bennett L, et al, 1995. Analyses of dissolved organic carbon in seawater: the JGOFS EqPac methods comparison[J]. Marine Chemistry, 48(2): 91-108. doi: 10.1016/0304-4203(94)00040-K
[38]	Shen Yuan, Benner R, 2020. Molecular properties are a primary control on the microbial utilization of dissolved organic matter in the ocean[J]. Limnology and Oceanography, 65(5): 1061-1071. doi: 10.1002/lno.11369
[39]	Shen Yuan, Benner R, Broek T A B, et al, 2025. Special delivery of proteinaceous matter to deep-sea microbes[J]. Science Advances, 11(12): eadr0736. doi: 10.1126/sciadv.adr0736
[40]	Song Shuzhen, Gao Lei, Ge Jianzhong, et al, 2022. Tidal effects on variations in organic and inorganic biogeochemical components in Changjiang (Yangtze River) Estuary and the adjacent East China Sea[J]. Journal of Marine Systems, 227: 103692. doi: 10.1016/j.jmarsys.2021.103692
[41]	Song Shuzhen, Gao Lei, Li Daoji, et al, 2017. Distributions and dynamics of dissolved carbohydrate species in Changjiang Estuary and the adjacent East China Sea[J]. Marine Chemistry, 194: 22-32. doi: 10.1016/j.marchem.2017.04.002
[42]	Thornton D C O, 2014. Dissolved organic matter (DOM) release by phytoplankton in the contemporary and future ocean[J]. European Journal of Phycology, 49(1): 20-46. doi: 10.1080/09670262.2013.875596
[43]	Wagner S, Schubotz F, Kaiser K, et al, 2020. Soothsaying DOM: a current perspective on the future of oceanic dissolved organic carbon[J]. Frontiers in Marine Science, 7: 341. doi: 10.3389/fmars.2020.00341
[44]	Wang Deli, Henrichs S M, Guo Laodong, 2006. Distributions of nutrients, dissolved organic carbon and carbohydrates in the western Arctic Ocean[J]. Continental Shelf Research, 26(14): 1654-1667. doi: 10.1016/j.csr.2006.05.001
[45]	Wang Xuri, Cai Yihua, Guo Laodong, 2010. Preferential removal of dissolved carbohydrates during estuarine mixing in the Bay of Saint Louis in the northern Gulf of Mexico[J]. Marine Chemistry, 119(1-4): 130-138. doi: 10.1016/j.marchem.2010.01.006
[46]	Xie Lei, Xu Jie, Yang Bin, et al, 2025. Oyster farming and hydrodynamic conditions regulate composition and sources of sedimentary organic matter in a typical river-estuary-bay continuum[J]. Journal of Hydrology, 661: 133619. doi: 10.1016/j.jhydrol.2025.133619
[47]	Xu Cheng, Dan S F, Yang Bin, et al, 2021. Biogeochemistry of dissolved and particulate phosphorus speciation in the Maowei Sea, northern Beibu Gulf[J]. Journal of Hydrology, 593: 125822. doi: 10.1016/j.jhydrol.2020.125822
[48]	Yang Bin, Kang Zhenjun, Lu Dongliang, et al, 2018. Spatial variations in the abundance and chemical speciation of phosphorus across the river-sea interface in the northern Beibu Gulf[J]. Water, 10: 1103. doi: 10.3390/w10081103
[49]	Yang Bin, Lin Hui, Bartlett S L, et al, 2021. Partitioning and transformation of organic and inorganic phosphorus among dissolved, colloidal and particulate phases in a hypereutrophic freshwater estuary[J]. Water Research, 196: 117025. doi: 10.1016/j.watres.2021.117025
[50]	Yang Guipeng, Zhang Yanping, Lu Xiaolan, et al, 2010. Distributions and seasonal variations of dissolved carbohydrates in the Jiaozhou Bay, China[J]. Estuarine, Coastal and Shelf Science, 88(1): 12-20. doi: 10.1016/j.ecss.2010.03.009
[51]	Youssef D H, El-Said G F, Shobier A H, 2014. Distribution of total carbohydrates in surface sediments of the Egyptian Mediterranean coast, in relation to some inorganic factors[J]. Arabian Journal of Chemistry, 7(5): 823-832. doi: 10.1016/j.arabjc.2012.12.030
[52]	Zeppenfeld S, van Pinxteren M, Engel A, et al, 2020. A protocol for quantifying mono- and polysaccharides in seawater and related saline matrices by electro-dialysis (ED)-combined with HPAEC-PAD[J]. Ocean Science, 16(4): 817-830. doi: 10.5194/os-16-817-2020
[53]	Zhu Wenzhuo, Yang Guipeng, Zhang Honghai, 2017. Photochemical behavior of dissolved and colloidal organic matter in estuarine and oceanic waters[J]. Science of The Total Environment, 607-608: 214-224. doi: 10.1016/j.scitotenv.2017.06.163

层次	项目	C_MCHO/(μmol C·L⁻¹)	C_PCHO/(μmol C·L⁻¹)	C_TCHO/(μmol C·L⁻¹)	C_MCHO/C_TCHO	C_PCHO/C_TCHO
表层	范围	8.52~43.71	9.96~21.01	19.54~61.72	32.2%~76.1%	23.9%~67.8%
表层	平均值	24.78±12.72	14.75±3.66	39.53±12.87	(59.1±15.5)%	(40.9±15.5)%

研究区域	调查时间	C_MCHO/(μmol C·L⁻¹)	C_PCHO/(μmol C·L⁻¹)	C_TCHO/(μmol C·L⁻¹)	参考文献
伊兹密尔湾	2017	0.70~8.30	0.70~19.50	2.60~24.60	Alyuruk et al, 2018
东海	2012	3.30~13.00	1.30~24.80	10.20~35.80	He et al, 2015
南海北部	2015	0.22~13.66	1.51~21.02	2.63~26.24	龚词等, 2017
北冰洋	2002	0.40~8.60	0.50~13.60	1.3~18.90	Wang et al, 2006
墨西哥湾	2010	4.00~27.00	5.00~76.00	15.00~103.00	Lin et al, 2015
孟加拉湾	1995—1996	2.40~15.60	17~36.60	27.00~47.40	Bhosle et al, 1998
加尔维斯敦湾	1999	13.30~62.10	10.2~41.90	23.00~96.70	Hung et al, 2001
三一河	2000—2001	27.00~112.00	3.70~16.30	35.60~155.40	Hung et al, 2005
胶州湾	2007—2008	2.90~65.90	0.30~210.20	10.80~276.10	Yang et al, 2010
茅尾海	2021	6.00~38.40	5.28~38.40	12.96~72.80	曾德斌等, 2025
大风江口海域	2022	8.52~43.71	9.96~21.01	19.54~61.72	本研究

Distribution characteristics of dissolved carbohydrates and their influencing factors in the Dafengjiang River Estuary (Qinzhou Bay, northern South China Sea)

RichHTML

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 8

References 53

Related Articles 7

Metrics

Comments

Recommended 0

[1]	ZHOU Weihua, YAO Yukun, LUO Yong, LI Tao, LONG Aimin, HUANG Hui. Long-term variation of dissolved organic carbon and its influencing factors in Sanya Bay* [J]. Journal of Tropical Oceanography, 2026, 45(2): 106-116.
[2]	ZENG Debin, PENG Guangyu, YANG Bin, MO Xiaorong, ZHOU Jiaodi, HUANG Haifang, YAN Tingting. Distribution characteristics of dissolved carbohydrates and their influencing factors in the Maowei Sea, Qinzhou Bay, northern South China Sea [J]. Journal of Tropical Oceanography, 2025, 44(3): 197-205.
[3]	HUANG Wen, FENG Yi, LI Ming, WU Qian, LUO Yanqiu, CHEN Yinmin, WANG Lirong, YU Kefu. A review on the population genetics of scleractinian corals [J]. Journal of Tropical Oceanography, 2024, 43(6): 13-26.
[4]	LI Ao, FENG Yang, WANG Yuntao, XUE Huijie. Spatiotemporal variation of water area with high chlorophyll a concentration in the South China Sea based on OC-CCI data* [J]. Journal of Tropical Oceanography, 2022, 41(2): 77-89.
[5]	Donghai XU, Lijie WANG, Yongjian YAO, Zhen SUN, Ning QIU. Spatial and temporal distribution characteristics of carbonates in Liyue Basin and their tectonic implications [J]. Journal of Tropical Oceanography, 2018, 37(6): 49-62.
[6]	GUO Wei, YE Feng, LIAN Zhonglian, JIA Guodong. Seasonal changes of organic carbon in the Pearl River estuary [J]. Journal of Tropical Oceanography, 2016, 35(4): 40-50.
[7]	TIAN Li-xin,WU Ying,LIN Jing,ZHU Zhuo-yi,ZHANG Jing. Distribution and composition of organic carbon in the northeastern Hainan rivers and coasts during winter [J]. Journal of Tropical Oceanography, 2010, 29(5): 136-141.