收稿日期: 2009-11-19
修回日期: 2010-04-01
网络出版日期: 2011-10-10
基金资助
中国科学院知识创新工程重要方向性项目(KZCX2-YW-Q07-02); 中科院南海海洋研究所知识创新工程领域前沿项目(LYQ200701)
Distribution of transparent exopolymer particles in the Pearl River Estuary in summer
Received date: 2009-11-19
Revised date: 2010-04-01
Online published: 2011-10-10
Supported by
中国科学院知识创新工程重要方向性项目(KZCX2-YW-Q07-02); 中科院南海海洋研究所知识创新工程领域前沿项目(LYQ200701)
本文研究夏季珠江口透明胞外聚合颗粒物(TEP)含量以及分布特征。结果表明, 珠江口TEP含量(以黄原胶物质的量计算, 下同)范围在85.0—1234.9μg•L?1之间, 平均值为690.9μg•L?1。表层和底层TEP均值分别为562.3μg•L?1和778.2μg•L?1, 大部分站位表层TEP含量略低于底层。TEP在表层分布自上游至下游逐渐递增, 而向外海以及入海口东西两侧延伸逐渐降低。内河口为底层TEP含量高值区, 虎门附近S3站TEP含量最高。TEP与不同粒径浮游植物叶绿素a的相关性分析表明微型浮游植物(粒径3—20µm)可能对珠江口TEP贡献较大。珠江口TEP/Chl a比值与活性硅酸盐、硝酸盐、铵盐和总磷浓度呈现负相关性; 表层TEP/Chl a比值与盐度呈现正相关性, 这表明盐度和营养盐可能是影响TEP含量的重要因素。
关键词： 珠江口; 透明胞外聚合颗粒物(TEP); 叶绿素
孙翠慈,王友绍,吴梅林,李楠,林立,宋晖,王玉图,邓超,彭亚兰,孙富林,李超伦 . 夏季珠江口透明胞外聚合颗粒物分布特征[J]. 热带海洋学报, 2010 , 29(5) : 81 -87 . DOI: 10.11978/j.issn.1009-5470.2010.05.081
We investigate the spatial distributions of transparent exopolymer particles (TEP) in the Pearl River Estuary in summer by analyzing the TEP concentration and size-fractions of Chl a. TEP concentration (calculated by the amount of xan-than; the same below) ranged from 85.0μg•L?1 to 1234.9μg•L?1, with an average of 690.9μg•L?1. The averaged TEP concentra-tions in the surface layer and bottom layer were 562.3μg•L?1 and 778.2μg•L?1, respectively, and for most stations lower con-centration of TEP was found in the surface layer as compared to the bottom layer. In the surface layer, TEP increased from the up stream to down stream, and decreased gradually towards the open sea and towards the east and west in the estuary. In the bottom layer, the maximum TEP was observed in the S3 near Humen. The correlation between TEP and Chl a suggests that the excretion of naon-phytoplankton (3-20µm) may contribute more to TEP than other size phytoplankton. The ratio of TEP/(Chl a) shows positive correlation with salinity but negative correlation with nutrition (NO3—N, NH4—N, SiO3—Si and total phos-phorus).
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