1. Guangzhou Monitoring Center of Marine Resources and Environment, Guangzhou, 510235; 2. Ocean University of China, Qingdao, 266003; 3. Jinan University, Guangzhou, 510630; 4. South China Sea Institute of Oceanology, Guangzhou, 510301, China
Our survey was conducted between Mar. 2004 to Mar. 2005 in the area the area of 22°33′to 22°41′N,113°37′to 113°42′E. The results showed that densities of Skeletonema costatum were higher at the outer estuary than those at the inner estuary and one high density peak was observed in the typical annual monitoring. The relationship between densities of Skeletonema costatum and its environmental factors was studied by correlation analysis. There was a notably negative correlation between the densities of Skeletonema costatum and phosphate,and was a notably positive correlation between the densities of Skeletonema costatum and silicate; no obvious relation was not found for environmental factors. Phosphate and silicate are likely to be the limit factors for Skeletonema costatum in Guangzhou sea area.
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