不同浓度的营养盐(NO_3-N,PO_4-P)条件下Pb(Ⅱ)对2种海洋赤潮藻生长影响的研究  

Effects of Pb(Ⅱ)on the Growth of HAB Algae at Different Concentrations of Macro Nutrients(NO_3-N,PO_4-P)

作　　者：王修林[1] 张莹莹[1] 杨茹君[1] 战玉杰[1] 

机构地区：[1]中国海洋大学化学化工学院,山东青岛266003

出　　处：《中国海洋大学学报（自然科学版）》2005年第1期133-136,141,共5页Periodical of Ocean University of China

基　　金：国家自然科学重点基金项目 (40 1 360 2 0 );教育部重点项目 (0 1 1 1 0 )资助

摘　　要：探讨海区环境容量的估算 ,为海水水质标准的制订提供理论依据 ,采用 1次培养实验方法 ,研究了 3种不同浓度的营养盐 (NO3 -N ,PO4-P)条件下Pb(Ⅱ )对旋链角毛藻 (Chaetoceroscurvisetus)、中肋骨条藻 (Skeletonemacostatum (Greville)Cleve)的生长影响。采用抑制率 重金属离子浓度的对数方程拟合求算出 3种浓度营养盐 (NO3 -N、PO4-P)条件下Pb(Ⅱ )对 2种赤潮藻的 96hEC50 值 ,分别为 83 73 ,2 5 63 ,2 3 0 7;185 2 3 ,10 44 5 ,3 494μg·dm-3 ,并根据方程应用origin 7.0拟合 3种不同浓度的营养盐 (NO3 -N ,PO4-P)条件下旋链角毛藻和中肋骨条藻在不同浓度Pb(Ⅱ )条件下的生长曲线。实验结果表明 ,较低浓度Pb(Ⅱ )对旋链角毛藻和中肋骨条藻生长都有一定的促进作用 ,最佳促进藻类生长浓度分别为 45 4,2 5 8,5 1;3 5 1,194,3 5 μg·dm-3 ;高浓度Pb(Ⅱ )对它们的生长则表现为抑制作用 ,并且随着营养盐 (NO3 -N ,PO4-P)浓度的增加 ,Pb(Ⅱ )对两种赤潮藻生长的抑制作用是逐渐降低的 ,营养盐 (NO3 -N ,PO4-P)与Pb(Ⅱ )之间可能存在着拮抗作用。In a batch culture experiment, it was tested the effects of Pb(Ⅱ) on the growth of 2 species of HAB algaes(Chaetoceros curvisetus, Skeletonema costatum) at different concentrations of micro nutrients(NO 3-N and PO 4-P). The results show that the 96hEC 50 of Pb(Ⅱ) for the Chaetoceros curvisetus and Skeletonema costatum were found to be 8 373, 2 563, 2 307 and 18 523, 10 445, 3 494μg·dm -3 respectively. A growth model,which took into consideration of the effect of Pb 2+ on the growth of marine algae, was used to describe the growth process of the HAB algaes at different concentrations of micro nutrients(NO 3-N,PO 4-P). The experimental results showed that higher doses of Pb(Ⅱ) inhibited the growth of the algae, while lower doses promoted the growth of the two HAB algae And the the effective concentrations of Pb(Ⅱ)that accelerated their growth most were found to be 454,258,51 and 351,194,35μg·dm -3respectively.

关 键 词：Pb(Ⅱ) 赤潮藻 营养盐 NO3-N PO4-P 

分 类 号：X131.2[环境科学与工程—环境科学]