Cd对前沟藻(Amphidinium hoefleri)生产二甲基硫(DMS)影响的实验研究  

Effects of Cd on DMS Producing by Marine Algae, Amphidinium hoefleri*

作　　者：蒋林[1] 胡敏[1] 任久长[1] 方晨 唐孝炎[1] 

机构地区：[1]北京大学环境科学中心环境模拟与污染控制国家重点联合实验室

出　　处：《环境科学》1999年第3期18-20,共3页Environmental Science

基　　金：国家自然科学基金

摘　　要：为了探讨Ｃｄ污染对海藻ＤＭＳ生产的可能影响，以模拟实验方式，为期３周进行Ｃｄ对海洋甲藻类的前沟藻（Ａｍｐｈｉｄｉｎｉ－ｕｍｈｏｅｆｌｅｒｉ）生产ＤＭＳ的实验室研究．结果表明，Ｃｄ可以抑制前沟藻种群数量的增长，对照组藻细胞最大数量是高浓度组（１０ｍｇ／Ｌ）的２５倍；Ｃｄ可以促进前沟藻细胞生产ＤＭＳ，其中高浓度组细胞ＤＭＳ产率大约是对照组的１０倍；Ｃｄ对藻数量的抑制作用和对藻生产ＤＭＳ的促进作用共同作用的结果，导致低浓度组（Ｃｄ浓度０．２５ｍｇ／Ｌ）ＤＭＳ浓度高于对照组，而高浓度组（Ｃｄ浓度≥２ｍｇ／Ｌ）ＤＭＳ浓度低于对照组．This paper discussed the Cds effects on DMS producing by marine algae,Amphidinium hoefleri in laboratory simulation test.The results show that the Cadmium pollution inhibits the growth of A.hoefleri,and the maximum cell number of the control group is about 25 times than that of high concentration group (10mg/L) during 3 weeks experiental period.However,Cadmium pollution promotes DMS producing by A.hoefleri which DMS production rate of high concentration group is about 10 times than that of the control group.The above two effects results in DMS concentrations with low cadmium pollution (025mg/L) is higher than that of the contrasted group,while DMS concentrations with high cadmium pollution(2mg/L) is lower than that of the contrasted group.8 regression equations between biomass (Chla concentrations and Amphidinium hoefleri cell quantity) and DMS concentrations on different cadmium pollution conditions are given in this paper.

关 键 词：镉 前沟藻 二甲基硫 种群数量 海洋污染 

分 类 号：X550.323[环境科学与工程—环境工程]