【摘要】 为了探讨巢湖东半湖蓝藻水华暴发时空分布规律及其成因,对2008—2009年巢湖东半湖蓝藻密度、叶绿素含量及相关水质指标进行研究。采用逐步剔除法和逐步回归法进行分析,获得巢湖东半湖蓝藻水华暴发时空分布图。结果表明,巢湖东半湖蓝藻暴发存在明显的时空分布差异,藻华形成(叶绿素a含量、蓝藻密度)与透明度、高锰酸钾指数、氨氮以及总氮显著相关,结合多元回归分析可知,影响水华暴发的环境因子有水温、pH、透明度和总氮。更多还原

【Abstract】 To explore the tempo-spatial dynamics and cause of the cyanobacterial blooms in the east-half part of Lake Chaohu,the density of cyanobacterial,chlorophyll a,water temperature,total nitrogen,total phosphorus and pH were measured during 2008—2009.Cyanobacterial blooms generally appeared between June and August,and near the center(Zhongmiao)of the Lake.Cyanobacterial blooming(chlorophyll a content and algal density)was significantly correlated with transparency index,permanganate index,ammonia nitrogen and total nitrogen in water.Nitrogen in water was a critical factor leading to tocyanobacterial blooming.Suitable temperature facilitated this phenomenon.更多还原