摘要
在实验室模拟试验和现场周年观测数据基础上,研究了厦门港湾重金属Cr,Cu,Hg,Zn对硅藻生长及水体营养水平对硅藻忍受重金属污染的效应。结果表明,对硅藻毒性大小的顺序是Hg>Cu>Zn>Cr。采用6种因素(Cr,Cu,Hg.Zn,FA,N/P)3种水平的正交设计模拟了现场环境的多参数综合效应,证明水环境中几种重金属共存时以拮抗作用为主,实验室试验和现场调查均表明,在中营养水平下,硅藻生长最好,且增强了硅藻对重金属的忍受能力。
This paper is based upon the results of simulation experiments and annual observation on the effect of Cr,Cu,Hg,Zn,on diatom(Chaetoceros spp.,Skeletonema costatum,and Melosira sulcata)growth.Many physico-chemical parameters are found to play a considerable role in the toxicity and accumulation of metal in organisms especially in laboratory experiment.The Mesopic level in water environment is related to phytoplankton growth,whereas the higher nutrient level could have a negative impact on diatom production.Several metals mentioned above coexist in the investigated region and exert an antagonistic effect.We employed the mathematical statistics-orthogonal design in simulation experiments of 6 parameters(Cr,Cu,Hg,Zn,O.M.,N/P)with three levels per parameter system for diatom culture.It showed that(1)the range of content of heavy metals is as follows:Cr 10-30,Cu 0.5-50,Hg 0.02-1.5,Zn 20-100 and(2)the optimal nutrient contents:N 100-250,P 25-40,O.M.100,000(all in ppb).We observed these parameters,total phosphorus content,ratio of T-N/T-P(in atom)and Chlorophyl content in the investigated region for one year,and found that ranges of these data were 24-35ppb-P,10-18T-N/T-P,and 10-20 mgm^(-3)Chlorophyl(cell numbers of phytoplankton are about 10^(6) cells/L)in all probability.
作者
吴瑜端
陈慈美
王隆发
Wu Yuduan;Chen Cimei;Wang Longfa(Xiamen University)
出处
《海洋与湖沼》
1986年第3期173-184,共12页
Oceanologia Et Limnologia Sinica
基金
中国科学院科学基金的资助
