高州水库水华优势种铜绿微囊藻生长特性研究

Growth characteristics of a dominate species in Cyanobacterial bloom of Gaozhou reservoir, mycrocysis aeruginosa.

为了解高州水库水华期间藻类优势种的生长特性,在2010年春季高州水库水华大规模暴发期间,在室内分离、纯化培养水华藻类优势种铜绿微囊藻,分别研究不同氮、磷浓度,光强和温度对其生长速率的影响.结果表明,在氮、磷浓度分别为0.6mmol/L和24?mol/L,光照强度为30?mol/(m2?s),温度为25~30℃范围内,铜绿微囊藻生长状况较好,高州水库的铜绿微囊藻最适生长氮浓度和磷浓度高于滇池、洱海和巢湖,低于太湖,最适光照强度和温度条件与洱海和滇池的铜绿微囊藻相似,为20~30℃.

In this study, mycrocysis aeruginosa, a dominate species in the cyanobacterial bloom, was collected during blooming in 2010in Gaozhou reservoir. Isolation, purification and cultivation of mycrocysis aeruginosa were conducted in laboratory to study effects of light density and temperature on growth rate of mycrocysis aeruginosa in growth cultures with various nitrogen and phosphorus concentration. A relatively high growth rate of mycrocysis aeruginosa was found under the condition of 0.6mmol/L nitrogen, 24?mol/L phosphorus, 30?mol/(m2?s) light density and 25~30℃. The most suitable nitrogen and phosphorus concentration of mycrocysis aeruginosa in Gaozhou reservoir was higher than that in Tien Lake, Erhai Lake and Chaohu lake, while the most suitable concentration was lower than that in Taihu Lake. The optimum light density and temperature for growth of mycrocysis aeruginosa were 20~30℃similar to which in Erhai Lake and Tien Lake.