中文摘要：

在华南沿海地区，小型水库是重要的供水水源．于2006年4月、8月、12月3次对珠海市12座小型水库的叶绿素a（Chl．a）、浮游植物、总氮（TN）、总磷（TP）、透明度（SD）等进行采样测定，分析了叶绿素a浓度的分布、动态及其与浮游植物和环境因子的关系．12座水库叶绿素a浓度分布范围为1．3～33．2μg／L，抽水水库的叶绿素a浓度在8月份最低，而非抽水水库的叶绿素a浓度在8月份最高．12座水库TN浓度分布范围为0．18～1．76mg／L，TP浓度分布范围为0．01～0．79mg／L．总磷与叶绿素a浓度显著相关，ln（Chl．a）=O．5596ln（TP）＋4．5581（R^2=0．2337，P〈0．01）．总氮与叶绿素a浓度呈正相关关系，ln（Chl．a）=0．6077ln（TN）＋2．6199（R^2=0．2004，P〈0．01）．浮游植物生物量为0．135～8．759mg／L．非抽水水库主要以绿藻、硅藻、甲藻为优势类群，但木头冲水库12月份以蓝藻为优势种类．抽水水库的浮游植物优势种变化较大，叶绿素a浓度与浮游植物生物量呈显著正相关，ln（Chl．a）=0．27921n（biomass）＋2．1083（R^2=0．245，P〈0．01）．叶绿素a浓度与环境因子的相关性具有明显的季节变化，这主要是由营养盐负荷和水文条件的季节变化所决定．抽水与非抽水水库的叶绿素a浓度与环境因子的相关性具有明显的差别，这主要是由于调水改变了水体的营养盐负荷和水文节律．叶绿素a浓度与浮游植物生物量具有正相关关系，这种相关性的季节变化随浮游植物组成的变化（特别是优势种类的变化）而变化．图7表1参29

英文摘要：

Small reservoirs play an important role in drinking water the effects of the concentration, distribution and seasonal changing supply in the coastal South China. In order to understand dynamics of chlorophyll a on the environmental factors of reservoirs, 12 small reservoirs were investigated in April, August, and Decemeber, 2006. The chlorophyll a concentration in the reservoirs ranged from 1.3 to 33.2 μg/L, and the concentration in pumped storage reservoirs was lowest in August, but highest in the non-pumped storage ones in the same period. The total nitrogen （TN） and total phosphate （TP） concentrations in the 12 reservoirs ranged from 0.18 to 1.76 mg/L and from 0.01 to 0.79 mg/L, respectively. The correlations of chlorophyll a concentration with TP and TN concentrations were significant, with ln （Chl.a）=0.5596 ln （TP）＋4.5581 （R^2=0.2337, P〈0.01）, and ln （Chl.a）=0.6077 ln （TN）＋2.6199 （R^2=0.2004, P〈0.01）. The phytoplankton biomass ranged from 0.135 to 8.759 mg/L. In the non-pumped storage reservoirs, phytoplankton community was dominated by Chlorophyta, Bacillariophyta and Pyrrophyta, but only by Cyanophyta in the Mutouchong Reservoir in December. In the pumped storage reservoirs, the dominant species differed in different seasons, and Pyrrophyta only dominated in the Xianfengling Reservoir. The correlation of chlorophyll a concentration with phytoplankton biomass was significant, ln （Chl.a）=0.2792 In （biomass）＋2.1083 （R^2=0.245, P〈0.01）. There was an obvious seasonal variation in the correlations between chlorophyll a concentration and environmental factors： TN, TP and SD, and this seasonal variation was regulated by nutrient load and hydrological processes. Because the nutrient load and hydrological rhythm were modified by pumping water, the difference in seasonality of the correlation between chlorophyll a concentration and environmental factors was significant between the pumped and non-pumped storage reservoirs. The correlation of chlorophyll a conc