【摘要】 湖泊富营养化常导致蓝藻生物量的增加,水质恶化。于2011年2月至12月对热带浅水湖泊惠州西湖六个湖区的蓝藻群落结构进行研究,以了解其时空变化特征及主要影响因素。结果表明,以沉水植物为优势的元妙观湖区与南南湖蓝藻无明显的优势种;平湖蓝藻优势种为银灰平裂藻(Merismopedia glauca)和湖丝藻(Limnothrix sp.),南丰湖、北丰湖和北南湖的主要优势种均为银灰平裂藻(Merismopedia glauca)。平湖、南丰湖、北丰湖和北南湖蓝藻丰度及生物量存在显著的季节变化。相关分析显示惠州西湖夏季蓝藻生物量受氮、磷盐控制。冬季温度的影响,蓝藻生物量与氮、磷的相关性不显著。更多还原

【Abstract】 Eutrophication often leads to the increase in biomass of blue-green algae,resulting in water quality deterioration.Community structure of blue-green algae in relation to water environments was investigated in six lake areas of Huizhou West Lake,a shallow tropical lake from February to December,2011.The results showed that there was no dominant cyanobacteria species in Yuanmiaoguan and Nannanhu;while Merismopedia glauca and Limnothrix sp.were the dominant species in Pinghu and M.glauca was the dominant species in Nanfenghu,Beifenghu and Beinanhu.The abundance and biomass of cyanobacteria changed seasonally in Pinghu,Beifenghu,Nanfenghu and Beinanhu.The correlation analysis showed that nitrogen and phosphorus controlled the biomass of cyanobacteria in Huizhou West Lake in summer,and in winter the relationship between cyanobacterial biomass and nitrogen,or phosphorus was not significant due to low water temperature.更多还原