摘要
2005年对太湖梅梁湾大型鲢、鳙控藻围栏内外浮游甲壳动物群落结构的季节变化进行了监测.结果表明:围栏内外的环境因子、浮游植物生物量、浮游甲壳动物种类组成无显著差异.但鲢、鳙放养对浮游甲壳动物的生物量产生了较大的影响,围栏内浮游甲壳动物的总生物量和枝角类的生物量显著低于围栏外.总体上,枝角类各种类的生物量受鲢、鳙放养的影响程度大于桡足类的种类.太湖梅梁湾浮游甲壳动物的季节演替明显,大部分种类只是季节性出现.冬季和春季以溞(Daphnia sp.)和近邻剑水蚤(Cyclops vicnus)等大型种类为主,夏季和秋季以象鼻溞(Bosmina sp.)、角突网纹溞(Ceriodaphnia cornuta)和中华窄腹剑水蚤(Limnoi-thona sinensis)等小型种类为主.典范对应分析表明,透明度、温度和浮游植物的生物量是影响浮游甲壳动物季节变化的主要因素.
In 2005,a large bio-manipulation pen with the stock of silver carp and bighead carp was built to control the cyanobacterial bloom in Meiliang Bay of Taihu Lake.This paper investigated the seasonal variation of the community structure of crustacean zooplankton and the water quality within and outside the pen.There were no significant differences in the environmental parameters and phytoplankton biomass within and outside the pen.The species composition and seasonal dynamics of crustacean zooplankton within and outside the pen were similar,but the biomass of crustacean zooplankton was greatly suppressed by silver carp and bighead carp.The total crustacean zooplankton biomass and cladocerans biomass were significantly lower in the pen(P0.05).In general,silver carp and bighead carp exerted more pressure on cladoceran species than on copepod species.A distinct seasonal succession of crustacean zooplankton was observed in the Bay.Many crustacean species were only dominated in given seasons.Large-sized crustacean(mainly Daphnia sp.and Cyclops vicnus) dominated in winter and spring,while small-sized species(mainly Bosmina sp.,Ceriodaphnia cornuta,and Limnoithona sinensis) dominated in summer and autumn.Canonical correspondence analysis showed that water transparency,temperature,and phytoplankton biomass were the most important factors affecting the seasonal succession of the crustacean.
出处
《应用生态学报》
CAS
CSCD
北大核心
2012年第8期2270-2276,共7页
Chinese Journal of Applied Ecology
基金
国家高技术研究发展计划项目(2002AA601011)
国家重点基础研究发展计划项目(2008CB418006-4)
国家自然科学基金项目(41006066)资助
关键词
鲢
鳙
浮游甲壳动物
群落结构
蓝藻水华
silver carp
bighead carp
crustacean zooplankton
community structure
cyanobacterial bloom