洋河水库水华优势种演替的原因分析  

Analysis of succession of dominant algal species in water bloom of Yanghe Reservoir

作　　者：赵伟[1,2,3] 李涵[1] 许秋瑾[1] 席北斗[1,4] 魏自民[2] 储昭升[1] 

机构地区：[1]中国环境科学研究院,北京100012 [2]东北农业大学生命科学学院,哈尔滨150030 [3]黑龙江省环境保护科学研究院,哈尔滨150056 [4]中国环境科学研究院环境基准与风险评估国家重点实验室,北京100012

出　　处：《环境工程学报》2011年第9期1989-1993,共5页Chinese Journal of Environmental Engineering

基　　金：国家公益性行业科研专项项目(2009090482;00909054);国家"水体污染控制与治理"科技重大专项(2009ZX07106-001)

摘　　要：针对鱼腥藻和微囊藻这2种洋河水库水华暴发常见优势藻,研究了其在不同温度及硝态氮浓度下的生长情况。结果表明,在温度15～25℃,硝态氮浓度0.05～10 mg/L的范围内,温度的升高、硝态氮浓度的增加,对鱼腥藻的生长影响不明显,却能够明显地促进微囊藻的增长。15℃或0.05 mg/L硝氮条件下,鱼腥藻的比增长速率高于微囊藻,而25℃或10 mg/L硝氮时,微囊藻的比增长速率分别达到了0.425 d-1和0.466 d-1,明显超过鱼腥藻。洋河水库逐年升高的硝态氮浓度以及夏秋季节比较适宜的温度促进了微囊藻的增长,可能是洋河水库水华优势种由螺旋鱼腥藻向微囊藻转变的重要因素。Anabaena sp.and Microcystis sp.are the two common dominant algal species in the water bloom occurs in Yanghe Reservoir.Study on the growth of the above two dominant algal species was conducted under different conditions of temperature and nitrate nitrogen concentration.The results showed that no significant impact is caused by the increase of temperature and nitrate nitrogen concentration on the growth of Anabaena sp.,when the temperature ranged from 15 ℃ to 25 ℃ and the nitrate nitrogen concentration ranged from 0.05 mg/L to 10 mg/L,while bringing with obvious promotion of Microcystis sp.growth.Under the condition of 15 ℃ or 0.05 mg/L nitrate nitrogen concentration,the specific growth rate of Anabaena sp.is higher than that of Microcystis sp..However,the specific growth rates of Microcystis sp.could reach 0.425 and 0.466 d-1 separately under 25 ℃ or 10 mg/L nitrate nitrogen concentration,being obviously higher than that of Anabaena sp.The yearly increasing nitrate nitrogen concentration and suitable temperature in summer and autumn have stimulated the growth of Microcystis sp.,which becomes the significant potential factor causing the succession of dominant algal species in the water bloom of Yanghe Reservoir from Anabaena sp.to Microcystis sp.

关 键 词：洋河水库 螺旋鱼腥藻 微囊藻 温度 硝态氮 

分 类 号：X524[环境科学与工程—环境工程]