夏季南海北部溶解碳水化合物浓度分布

doi:10.13634/j.cnki.mes20170301

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摘要采用TPTZ（2，4，6三吡啶-s-三嗪，C₁₈H₁₂N₆）方法对2015年6月采集的南海北部表层海水，以及珠江口东侧S断面进行了碳水化合物的分析。结果表明，溶解单糖（dissolved monosaccharide， MCHO）、溶解多糖（dissolved polysaccharide， PCHO）及溶解总糖（total dissolved carbohydrate， TCHO）的浓度范围分别是0.22~13.66，1.51~21.02和2.63~26.24 μmol C/L。表层海水MCHO、TCHO和PCHO具有相似的分布特点：近岸高，远海低；高值区大多分布在近岸受陆地影响较大的海区。S断面分析表明，该区域海水分层明显，MCHO、TCHO和PCHO分布较为相似，上层浓度高于下层浓度，浓度最高值出现在上层海水，部分站位受珠江冲淡水影响较大。表层海水的Chl a（chlorophyll a）与DOC（dissolved organic carbon）浓度分布大体上也呈现类似特点，不同之处在于水平分布方面Chl a的浓度分布与盐度分布更为类似，垂直分布方面在真光层以下Chl a与DOC的浓度分布无高值区。同时结果也表明二者的浓度分布对MCHO、TCHO和PCHO的分布有较大影响。

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	龚词
	杨桂朋

关键词：南海 TCHO MCHO PCHO 分布

Abstract：Seawater samples were collected from the northern South China Sea in June 2015 to study spatial distributions of total dissolved carbohydrates(TCHOs) constituents, including dissolved monosaccharides(MCHOs) and polysaccharides(PCHOs). The concentrations of TCHOs, MCHOs and PCHOs were measured with TPTZ(2,4,6-tripyridyl-s-triazine,C₁₈H₁₂N₆) method. The results showed that the horizontal distributions of TCHOs, MCHOs and PCHOs displayed a decreasing trend from inshore to offshore sites and high concentrations mostly appeared in inshore sites which were influenced evidently by anthropogenic activity. Based on the study of the transect S in the east of the Pearl River estuary, seawater in this area was significantly stratified, and the vertical distributions of TCHOs, MCHOs and PCHOs were similar. Moreover, the concentrations of TCHOs, MCHOs and PCHOs of the seawater in the upper layer were higher than those in the lower layer, and the maxima of TCHOs, MCHOs and PCHOs appeared in the upper layer. In addition, the concentrations at some stations were influenced evidently by the Pearl River diluted water. The distributions of Chl a and dissolved organic carbon(DOC) were similar to those of TCHOs, MCHOs and PCHOs. However, the horizontal distributions of Chl a and salinity were more similar and there was no high value for the vertical distributions of Chl a and DOC under the euphotic layer. At the same time, the results also showed that the distributions of Chl a and DOC had a great influence on the distribution of TCHOs, MCHOs and PCHOs.

Key words： South China Sea total dissolved carbohydrates monosaccharides polysaccharides distributions

收稿日期: 2016-06-23;

PACS:

基金资助:

山东省"泰山学者"建设工程研究专项（2011）；青岛海洋科学与技术国家实验室"鳌山人才"计划项目（2015ASTP）

通讯作者: 杨桂朋,E-mail:gpyang@ouc.edu.cn E-mail: gpyang@ouc.edu.cn

作者简介:龚词(1992-),女,河南周口人,硕士研究生,主要研究方向为海洋界面化学,E-mail:gongci2010@163.com

引用本文:

龚词,杨桂朋. 夏季南海北部溶解碳水化合物浓度分布[J]. 海洋环境科学, 2017, 36(3): 321-327.

GONG Ci,YANG Gui-peng. Distributions of dissolved carbohydrates in the northern South China Sea during summer[J]. Marine Environmental Science, 2017, 36(3): 321-327.

链接本文:

http://hyhjkx.nmemc.org.cn/CN/10.13634/j.cnki.mes20170301 或 http://hyhjkx.nmemc.org.cn/CN/Y2017/V36/I3/321

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