王快水库浮游植物调查及富营养化评价

Preliminary Study of the Phytoplankton and Eutrophication Assessment in Wangkuai Reservoir

通过对2010年8月和9月王快水库坝前浮游植物类群的结构组成、优势类群进行调查,结果表明,王快水库浮游植物有6门,25种,种类最多的为绿藻门和硅藻门,分别鉴定出9种和7种;9月的调查结果表明浮游植物细胞密度为299.57万个/L,硅藻门和蓝藻门共占浮游植物总细胞密度的86.66%,优势种类为小环藻和粗壮细鞘丝藻,占浮游植物总细胞密度的61.69%;叶绿素a含量为3.88μg/L,浓度较低,营养状态为贫-中营养,水质状况较好。

The phytoplankton community and dominant species were investigated at Wangkuai Reservoir in August and September 2010. The re suits showed that there were 25 species belonging to 6 phylum of phytoplankton in Wangkuai Reservoir. Cholorophyta and Bacillariophyta were major phylum in the phytoplankton community, with 9 genera （36%） and 7 genera （28%） respectively. Investigations in September 2010 found out：the algal density was 2.99 × 10^6 Cell/L; Cyanophyta and Chlorophyta accounted for up to 86.66% of total cell density; Cyclotella sp. and Leptolyngbya valderiana were dominant speciesaccounting for 61.69% of total cell density; The concentration of chlorophyll was 3. 88 μg/L. The study indicated that the nutritional status of Wangkuai Reservoir was oligotrophic to mesotrophic and the water quality was good.