| 摘要: |
| 采用一次培养实验方法,研究了Pb2+对8种常见海洋浮游植物生长的影响。在Logistic生长模型的基础上,结合Lorentz方程和GaussAmp方程,引入Pb2+浓度项,建立新的方程来描述Pb2+存在条件下海洋浮游植物的生长过程,并且通过对实验数据的非线性拟合,验证该方程是合理的。实验拟合结果表明,高浓度Pb2+(c(Pb2+)≥2500μg/L)对浮游植物的生长普遍有抑制作用,而较低浓度Pb2+(c(Pb2+)≤100 μg/L)则易促进赤潮异弯藻(Heterosigma akashiwo Hada)、旋链角毛藻(Chaetoceros curvisetus Cleve)、三角褐指藻(Pheodactylum tricornutum Bohlin)、中肋骨条藻(Skeletonema costatum (Greville)Cleve)、青岛大扁藻(Platymonas helgolanidica Kylin var tsingtaoensis)、亚心型扁藻(Platymonas subcordiformis)的生长,它们最佳的促进生长浓度分别为: 1991、2523、101、1488、627、509 μg/L,但对于海洋原甲藻(Prorocentrum micans Ehrenberg)、裸甲藻(Gymnodinium sp.)的生长没有明显的影响。应用该方程在一定程度上不仅可以根据浮游植物的生长情况,推测相应海区的Pb2+污染物浓度;而且也可以预测不同浓度pb2+条件下,相应海区的海洋浮游植物的生长情况。 |
| 关键词: Pb2+ 浮游植物 生长模型 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学重点基金项目(40136020)教育部重点项目(01110) |
|
| Effects of Pb2+ on the growth of marine algae |
|
|
| Abstract: |
| In designed batch culture experiments, effects of Pb2+ on the growth of 8 species of marine algae were tested. The experimental results showed that higher doses of Ph2+ inhibited the growth of Heterosigma akashiwo Hada, Chaetoceros curvisetus, Skeletonerma costatum (Greville) Cleve, Pheodactylum tricornutuma Blhlin, Platymonas subcordiformis, Platrymonas helgolanidica Kylin var tsingtaoensis, Prorocentrum micans, Gymnodinium sp. But, and lower doses promoted the growth of marine algae, excluding Prorocentrummicans, Gymnodinium sp. A growth mode. In consideration of Pb2+ effect on the growth of marine algae, we incorporated Logistic growth model with Lorentz equation and Gaussamp equation. Lorentz equation can describe the effect of Ph2+ on growth rate constant, while Gaussamp equation can describe the effect of Ph2+ on final biomass of algae. It was demonstrated an agreed results between from growth model and the experimental data. |
| Key words: lead ion algae growth model |
