摘要
以博斯腾湖原水为培养液,通过添加SO42-和Cl-调节培养液的矿化度分别为0.5、1.5、3.5、10.0gL,考察不同矿化度对浮游植物生长及群落结构的影响. 结果表明：在对数生长期内,浮游植物生物量、比增长率及ρ（Chla）均随矿化度的增加而升高；生长后期高矿化度（10.0gL）对浮游植物有抑制作用. 在各矿化度下的浮游植物优势门类均为硅藻门,其生物量占藻类总生物量的95%以上. 随着矿化度升高,蓝藻门有较好的适应性,能够生长,但绿藻门受到明显抑制. 试验显示,优势属为脆杆藻（Fragilaria）、针杆藻（Synedra）、舟形藻（Navicula）和羽纹藻（Pinnularia）. 矿化度为0.5gL时很少出现舟形藻,但随着矿化度的升高,舟形藻逐渐成为优势种,其生物量占18.51%-26.18%；羽纹藻生物量在矿化度为0.5和1.5gL时所占比例分别达3.40%和4.94%,在高矿化度（3.5-10.0gL）下则极少出现,不再具有优势. 研究表明,舟形藻和羽纹藻可作为博斯腾湖咸化过程的参考藻种.
Four different total dissolved solids （TDS） gradients （0.5,1.5,3.5and 10.0gL） were set up to investigate the effects of various TDS on the dynamics of phytoplankton population and their growth. The primary constitutes of salt added to the culture solution were SO42- and Cl-, which accounted for 36.60% and 22.03%, respectively. The results demonstrated that during the logarithmic phase, the number of phytoplankton, growth rate, biomass and chlorophyll-a increased as total dissolved solids （TDS） increased. However, phytoplankton growth was restrained by high TDS in the later culture period. Bacillariophyta were the most advancded with more than 95% of the total species in every treatment group. With the increment of TDS, cyanophyta got better adaptability, while the inhibitory effect on Chlorophyta was obvious. Experiments showed that Fragilaria、Synedra、Navicula and Pinnularia were dominant species. Navicula rarely appeared under TDS （0.5gL）. However, it gradually became a dominant species, whose proportion ranged from 18.51%-26.18%. In contrast, Pinnularia accounted for 3.40% and 4.94% respectively at TDS of 0.5and 1.5gL, then could hardly grew at high TDS （3.5-10.0gL）. The results demonstrated that Navicula and Pinnularia could be used as indicator species to identify the salinizing process of Lake Bosten.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2013年第10期1072-1078,共7页
Research of Environmental Sciences
基金
国家环境保护公益性行业科研专项(201309041)
关键词
矿化度
浮游植物
博斯腾湖
total dissolved solids（TDS） phytoplankton Lake Bosten
