海南陵水湾与新村湾浮游植物光合色素及群落结构的时空分布特征

于2010年12月至2011年5月连续采集海南岛陵水湾和新村湾表层水样，利用高效液相色谱分析技术对浮游植物光合色素进行分析，运用CHEMTAX分析不同浮游植物对叶绿素a的贡献，研究陵水湾和新村湾浮游植物群落结构的时空分布特征，结合环境因子分析浮游植物群落结构与环境因素的关系。结果表明，大部分浮游植物光合色素浓度均呈现出由新村湾向陵水湾递减的空间分布规律，其中以岩藻黄素和叶绿素a为主，其平均浓度分别为0.53 μg/L和0.22 μg/L。CHEMTAX分析表明，两海湾均以硅藻占据优势，但陵水湾青绿藻、蓝藻、金藻等粒径较小的浮游植物种群所占比例高于新村湾，说明陵水湾浮游植物群落有小型化趋势。浮游植物的分布特征受温度、营养盐等环境因子影响显著。

The temporal and spatial distribution of phytoplankton pigments and community in Lingshui bay and Xincun bay,Hainan province

Surface waters were collected monthly from Lingshui bay and Xincun bay of Hainan province for analysis of phytoplankton pigments by using HPLC from December 2010 to May 2011. The temporal and spatial distributions of phytoplankton community were calculated using CHEMTAX. Furthermore, the relationships between the phytoplankton community and environmental factors were discussed. The results showed that the concentration of most pigments decreased from Xincun bay to Lingshui bay. Fucoxanthin and chlorophyll a were the two major pigments in Lingshui bay and Xincun bay, with an average of 0.53 μg/L and 0.22 μg/L, respectively. CHEMTAX conformed that the dominant algal groups were diatoms. However, the picophytoplankton and nanophytoplankton in Lingshui bay, such as Prasinophytes, Cyanobacteria and Chrysophytes, were higher than Xincun bay, indicating the miniaturizing tendency of phytoplankton community toward Lingshui bay. Statistical analysis revealed that the distribution of phytoplankton were obviously controlled by environmental factors, including temperature and nutrients.