鲢鳙放养水平对淀山湖浮游植物群落影响的围隔实验  

Stocking level effects of silver and bighead carps on the phytoplankton community in enclosures in Dianshan Lake

作　　者：王丽卿[1] 许莉[1] 陈庆江[2] 季高华[1] 张瑞雷[1] 范志锋[1] 张玮[1] 赵风斌[1] 

机构地区：[1]上海海洋大学水产与生命学院,上海201306 [2]上海市水务局,上海200050

出　　处：《环境工程学报》2011年第8期1790-1794,共5页Chinese Journal of Environmental Engineering

基　　金：上海市科委重大项目(08DZ1203103);上海市重点学科建设项目资助(S30701)

摘　　要：在淀山湖进行放养不同密度鲢、鳙的围隔实验(密度水平梯度设置为0、40、80和120 g/m3),探索鲢、鳙的现场控藻效果。结果表明,实验后期(8—9月),鲢、鳙放养密度为80 g/m3和120 g/m3的围隔对叶绿素a的去除效果显著(P<0.05);且放养密度为80 g/m3的围隔蓝藻比例降幅最明显。鲢、鳙对较大个体藻类以及大型浮游动物的滤食刺激了平裂藻(Merismopedia)和色球藻(Chroococcus)等小型藻类的大量生长。鲢、鳙放养3个月以后,蓝藻和隐藻共同组成围隔的优势藻类。单纯放养鲢、鳙的手段适于主要目标为控制蓝藻数量而非降低藻类总量的湖泊水体。Enclosures stocked with gradient biomass（0,40,80,120 g/m3） of silver and bighead carps were set up in Dianshan Lake to study the effects on algal control.It was indicated that 80 g/m3 and 120 g/m3 density of silver and bighead carp had a significant effect in decreasing the content of Chl.a;also 80 g/m3density of silver and bighead carp were most effective in reducing the percentage of Cyanophyta.However,the fish＇s grazing on the macro-algae and macro-zooplankton stimulated the growth of micro-algae such as Merismopedia and Chroococcus.After silver carp and bighead carp were stocked for more than three months,the dominant algae in enclosures were Cyanophyta,followed by Cryptophyta.Stocking of filter feeders（silver and bighead carps） was just suitable for controlling density of Cyanophyta not total biomass of algae.

关 键 词：生物操纵 鲢鳙 藻类控制 围隔实验 淀山湖 

分 类 号：X171.1[环境科学与工程—环境科学]