南湖春季细菌和浮游藻类群落的动态变化  

Dynamic Change of the Bacteria and Planktonic Algae Community of Nanhu in Spring

作　　者：刘梅芳[1] 万文[1] 裴国凤[1] 

机构地区：[1]中南民族大学生命科学学院,武汉430074

出　　处：《中南民族大学学报（自然科学版）》2007年第3期36-39,共4页Journal of South-Central University for Nationalities：Natural Science Edition

基　　金：国家973计划资助项目(2002CB412309)

摘　　要：在随机选取的6个样点,测定了春季南湖的水化学指标,细菌总数及浮游藻类群落的组成.调查结果发现:春季大多数样点的细菌总数表现出先增后减的趋势;在总氮、总磷含量较高,临近排污口的样点,其细菌总数相对高于附近没有明显污染源的非居民区样点,细菌总数在污染严重的样点最高可达4.5×10~5个/mL.观察发现,春季南湖浮游藻类细胞密度总体呈上升趋势;主要优势种是小球藻、栅藻、多芒藻、小环藻和隐藻等耐污性种类.但各样点浮游藻类的群落组成存在一定差异,在氮、磷含量较低的样点,种类较多;而在氮、磷含量高的样点,浮游藻类密度高达2.9×10~6个/mL,且种类单一,以多芒藻占绝对优势.The physical and chemical characteristics of the water,the dynamic change of the bacteria and planktonic algae community of Nanhu in six sampling random sites were investigated in spring,It was found that the total bacterial count in most of the sampling sites increased first,then decreased.In sites near sewage outlets with the higher nitrogen and phosphate concentrations,the total bacterial count was higher than sites without the impact of domestic sewage;reaching the highest count of 4.5×10~5cfu/mL in hea...

关 键 词：细菌总数 浮游藻类 富营养化 优势种群 

分 类 号：X52[环境科学与工程—环境工程]