光谱学与光谱分析, 2009, 29 (5): 1349, 网络出版: 2010-05-25   

东海硅藻赤潮后海水溶解有机物的荧光特征

Fluorescence Characterization of Dissolved Organic Matter in the East China Sea after Diatom Red Tide Dispersion
作者单位
1 中国科学院海洋研究所, 山东 青岛 266071
2 中国科学院研究生院, 北京 100039
摘要
利用激发-发射矩阵光谱法(EEMs), 测定了2007年4月下旬东海硅藻赤潮消亡后海水溶解有机物的三维荧光, 并对荧光特征及其强度与盐度、 叶绿素a和碳水化合物的关系进行了分析和讨论。 结果显示东海硅藻赤潮后海水中有较强的类蛋白荧光, 主要荧光峰有Exmax/Emmax为270~280/290~315 nm(B峰)和220~230/290~305 nm(D峰)的类酪氨酸荧光峰, 230~240/335~350 nm(S峰)和280/320 nm(T峰)的类色氨酸荧光峰, 其中B峰强度最大, 个别站点荧光强度高达3 955。 赤潮消亡主要海区的FIB/FIS较大, 表明类蛋白溶解有机物主要是由赤潮藻破碎分解产生的类酪氨酸。 在255~270/435~480 nm(A峰)和330~350/420~480 nm(C峰)还观察到两种类腐殖质荧光峰, 它们的强度低于类蛋白荧光。 S峰、 A峰和C峰三者之间互相呈较好的正相关, 且三者荧光强度与盐度都有显著的线性负相关, 其分布均呈现出近岸高远岸低的特点, 表明江浙沿岸水的输入是其共同的重要来源。 各类荧光峰的强度与叶绿素a的相关性不显著, 现存的浮游植物不是赤潮消亡水体中荧光溶解有机物的主要直接来源。
Abstract
Fluorescence excitation-emission spectroscopy (EEMS) was employed to analyze the 3-dimensional fluorescence of dissolved organic matter in the East China Sea after diatom red tide dispersion. The relationships between fluorescence peak intensity, and salinity and chlorophyll-a were discussed. The centers of protein-like fluorescence peaks dispersed at Exmax/Emmax=270-280/290-315 nm (Peak B), 220-230/290-305 nm (Peak D), 230-240/335-350 nm(Peak S)and 280/320 nm(Peak T). Two humic-like peaks appeared at 255-270/435-480 nm (Peak A)and 330-350/420-480 nm(Peak C). High tyrosine-like intensity was observed in diatom red tide dispersion area, and tryptophan-like fluorescence was also found which was lower. High FIB/FIS showed that diatom red tide produced much tyrosine-like matter during dispersion. Peaks S, A and C had positive correlation with one another, and their distributions were similar, which decreased with distance increasing away from the shore. Good negative correlations between peaks S, A and C and salinity suggested that Jiangsu-Zhejiang coastal water was the same source of them. Correlations between fluorescence peak intensity and chlorophyll-a were not remarkable enough to clear the relationship between fluorescence and living algal matter. It was supposed that the living algal matter contributed little to the fluorescence intensity of algal dispersion seawater.

禚鹏基, 赵卫红. 东海硅藻赤潮后海水溶解有机物的荧光特征[J]. 光谱学与光谱分析, 2009, 29(5): 1349. ZHUO Peng-ji, ZHAO Wei-hong. Fluorescence Characterization of Dissolved Organic Matter in the East China Sea after Diatom Red Tide Dispersion[J]. Spectroscopy and Spectral Analysis, 2009, 29(5): 1349.

本文已被 2 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!