Journal of Tropical Oceanography >
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)
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).
SUN Cui-ci,WANG You-shao,WU Mei-lin,LI Nan,LIN Li,SONG Hui,WANG . Distribution of transparent exopolymer particles in the Pearl River Estuary in summer[J]. Journal of Tropical Oceanography, 2010 , 29(5) : 81 -87 . DOI: 10.11978/j.issn.1009-5470.2010.05.081
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