摘要
选取冬季12月的玄武湖水样,调整培养液的起始金属离子浓度(锌:0、3.25×10-4、3.25×10^(-3)、3.25×10^(-2) mg·L^(-1);铁:0、2.80×10-4、2.80×10^(-3)、2.80×10^(-2)mg·L^(-1)),探讨金属离子锌、铁对浮游植物复苏过程中群落结构的影响。结果表明:当锌为3.25×10^(-2)mg·L^(-1)时,蓝藻的复苏受到明显的抑制,绿藻及硅藻的生长受到胁迫作用,Fv/Fm值分别降至0.40、0.30、0;当铁浓度高于2.80×10^(-2)mg·L^(-1)时,蓝藻的复苏同样受到抑制,Fv/Fm值降为0.45,而绿藻和硅藻的Fv/Fm分别为0.33和0.07。高铁浓度下复苏后的浮游植物以蓝藻门的微囊藻为主,绿藻门的栅藻次之;高浓度锌胁迫下复苏后的浮游植物主要为绿藻门的栅藻,其次是绿藻门的小球藻,再后是蓝藻门的微囊藻。
Many studies have focused on the effects of temperature, light and dissolved oxygen on the growth of phytoplankton. However, the understanding of metal effects on phytoplankton during recruitment remains unclear. In the present study, water samples taken from Xuanwu Lake in December have been used to clarify the relationship between metal concentration and community structure change during phyto-plankton recovery process. The initial zinc（0, 3.25×10^-4, 3.25×10^-3, 3.25×10^-2mg·L^-1）and iron concentrations（0, 2.80×10^-4, 2.80×10^-3,2.80×10^-2mg·L^-1）were employed in cultivation experiment. Results showed that when zinc concentration was higher than 3.25×10^-3mg·L^-1,the recruitment of blue algae was obviously inhibited and the growth of green algae and diatoms was reduced. The Fv/Fm values of these three algae were 0.4, 0.3 and 0,respectively. Similar results were also observed when iron concentration was over 2.80×10^-4mg·L^-1. The recruitment of blue algae was inhibited. Fv/Fm values of blue algae, green algae and diatoms were reduced to 0.45, 0.33 and 0.07, respectively. It can be concluded that recruited phytoplankton was dominated by Microcystis of Cyanophyta, followed by Scenedesmus under high iron concentrations, while its dominant species was Scenedesmus, followed by Chlorella and Microcystis under zinc stresses.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2016年第3期540-547,共8页
Journal of Agro-Environment Science
基金
国家自然科学基金面上项目(51479065)
江苏省优势学科建设项目(PAPD)
作者简介
滕益莉（1991-），女，安徽六安人，硕士研究生，主要研究方向为水污染控制理论与治理。E-mail：tengyili415@live．com
通信作者：王沛芳 E-mail：pfwang2005@hhu．edu．cn
