巢湖春夏季节浮游植物的动态变化  

Variations of phytoplankton in Chaohu Lake in spring and summer seasons

作　　者：孟小丽[1] 邓道贵[1] 张赛[1] 杨威[1] 陈丽娜[1] 

机构地区：[1]淮北师范大学生命科学学院资源植物生物学安徽省重点实验室,安徽省淮北235000

出　　处：《生态科学》2011年第2期189-194,共6页Ecological Science

基　　金：国家自然科学基金项目(31070387;30840025)

摘　　要：2009年3月至8月,利用原位围隔实验和野外调查,研究了巢湖春夏季节浮游植物的动态变化。结果显示:围隔中浮游植物密度和生物量的变动范围分别是(2.95～102.43)×10~5cells·L^(-1)和0.06～7.39 mg·L^(-1),优势种类为鱼腥藻属(Anabaena)、梅尼小环藻(Cyclotellameneghiniana)和圆筒锥囊藻(Dinobryon cylindricum),其最大生物量分别为0.82mg·L^(-1)、0.66mg·L^(-1)和2.98mg·L^(-1),均出现在3月或4月。在巢湖湖水中,春季(3～5月)浮游植物平均生物量为5.43mg·L^(-1),其中绿藻占47.59%、硅藻占40.81%、蓝藻占10.18%,优势种类为盘星藻属(Pediastrum)和梅尼小环藻;而夏季(6～7月)浮游植物平均生物量为7.89mg·L^(-1),其中蓝藻占58.67%、绿藻占26.77%、硅藻占11.64%,优势种类为微囊藻属(Microcystis)。磷和枝角类滤食对巢湖春夏季节浮游植物的生物量和群落结构有重要影响。We studied the variations ofphytoplankton in Chaohu Lake in spring and summer seasons using enclosure experiments and field investigation from March to August, 2009. The results showed that phytoplankton density and biomass in the enclosures were （2.95-102.43）×105 cells·L^-1 and 0.06-7.39 mg·L^-l, respectively. The dominant species were Anabaena sp., Cyclotella meneghiniana, and Dinobryon cylindricum, with their maximal biomass of 0.82 mgL-1, 0.66 mg·L^-1, and 2.98 mg·L^-1, respectively, occurring in March or April. In spring （from March to May）, the averaged phytoplankton biomass in Chaohu Lake was 5.43 mg·L^-1. Chlorophytes contributed the most to the total algal biomass （47.59%）, followed by Bacillariophytes （40.81%）, and then Cyanobacteria （10.18%）. The dominant species were Pediastrum sp. and C. meneghiniana. In summer （from June to July）, the phytoplankton biomass in Chaohu Lake was averaged 7.89 mg·L^-1. Cyanobacteria contributed 58.67% to total algal biomass, followed by Chlorophytes （26.77%） and Bacillariophytes （11.64%）. The dominant species was Microcystis sp.. Phosphorus and cladoceran grazing play important roles in the variations of phytoplankton biomass and community structure in Chaohu Lake in spring and summer seasons.

关 键 词：巢湖 浮游植物 围隔 季节动态 

分 类 号：Q187[生物学—普通生物学]