中文摘要：

根据2010年4月（春季）、2011年8月（夏季）在海南八门湾及其毗邻水域的采样调查,采用CHEMTAX化学分类法对该区域的表层水的浮游植物生物量以及类群进行了研究。初步的研究结果表明：春季,生物量由湾内向外海增大,最高值出现在文昌河入八门湾处,金藻、硅藻为主要优势类群。生物量与溶解无机氮（DIN）、SiO3^2-、PO4^3-正相关,与盐度负相关,浮游植物与营养盐比值（N∶P,Si∶N）相关性不明显,硅藻与P显著正相关。夏季,生物量空间分布差异较小,最高值出现在文教河,蓝藻、金藻、硅藻为优势类群。浮游植物生物量及群落结构特征与营养盐含量和比值之间存在相关性。生物量与SiO2-3正相关,与盐度负相关,绿藻与N∶P比呈正相关关系,绿藻还同时与N正相关,硅藻与Si∶N比正相关。

英文摘要：

Sampling was carried out in April 2010 and August 2011 in order to study the structure of phytoplankton community and its relationship with environment factors by software CHEMTAX in different seasons in the Bamen bay.The main results are as follows： the biomass increased from the Wenchang River to sea and appeared the maximum value in the river mouth to the Bamen bay. Chrysophytes and Chlorophytes were dominant groups in spring 2010. The biomass was positively correlation with dissolved inorganic nitrogen（ DIN）,SiO3-（2-）and PO4-（3-）in spring,while negatively correlation with salinity. There was little correlation between phytoplankton and nutrients ratios（ N∶ P ratio,Si∶ N ratio）. But Diatoms was positively correlation with PO4^3-. The biomass didn＇t show any apparent trend in summer 2011.And the maximum of biomass was in the bay. As to phytoplankton,Cyanobacteria,Chrysophytes and Diatoms were important groups in summer 2011. The biomass was positively correlation with SiO3^2-,while negatively correlation with salinity. There was obvious correlation between phytoplankton and nutrients ratios. The abundance of chlorophytes was positively correlation with N∶ P ratio and N,while the abundance of diatom was positively correlation with Si∶N ratio.