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本文采用TPTZ法测定了2010年冬季东海48个站位海水中溶解单糖(MCHO)、溶解多糖(PCHO)和溶解总糖(TCHO)的浓度,并对其水平分布和PN断面9个站位的垂直分布特征进行了研究。结果表明,表层海水中MCHO、PCHO与TCHO的平均浓度和范围分别为3.8(0.7~14.9)、6.9(1.1~20.8)和10.7(3.0~25.0)μmol C/L。水平分布大致呈现由近岸向外海递减的趋势,但是高值区各有不同,受各种水团如长江冲淡水、台湾暖流和黑潮的作用明显。冬季东海陆架海区海水垂直混合强烈,MCHO、PCHO及TCHO浓度分布在垂直方向上无明显规律,均在混合层(0~100 m)出现高值区分布。对长江口3个断面碳水化合物和环境因子的相关性研究表明,TCHO与温度、盐度均呈现显著的线性负相关,MCHO与叶绿素a(Chl a)呈现显著的线性正相关关系。
In this paper, the concentrations of MCHO, PCHO and TCHO in seawater at 48 stations in the East China Sea during the winter of 2010 were measured by TPTZ method. The horizontal distribution and 9 stations of PN cross section The vertical distribution characteristics were studied. The results showed that the average concentration and range of MCHO, PCHO and TCHO in surface seawater were 3.8 (0.7-14.9), 6.9 (1.1-20.8) and 10.7 (3.0-25.0) μmol C / L, respectively. The horizontal distribution generally shows a downward trend from the nearshore to the outer sea. However, the high value areas are different and are obviously affected by various water masses such as the Yangtze River flushing water, the Taiwan warm current and the Kuroshio. In winter, seawater from the East China Sea shelf sea area was strongly mixed vertically. There was no obvious vertical distribution of MCHO, PCHO and TCHO concentrations in the vertical distribution. Both of them presented high value distribution in the mixed layer (0-100 m). The correlation between carbohydrates and environmental factors in the three sections of the Yangtze River Estuary showed that there was a significant linear negative correlation between TCHO and temperature and salinity, and a significant linear positive correlation between MCHO and chlorophyll a (Chl a).