太湖夏季水下光谱及色光对微囊藻群体的影响

发布时间：2018-04-19 05:00

本文选题：微囊藻群体 + 群体粒径　；参考：《中国环境科学》2017年11期

【摘要】：在调查夏季水华期间太湖梅梁湾和贡湖湾采样点水下光谱的基础上,设计不同色光(红光、蓝光、白光对照)的室内模拟实验,探究色光对微囊藻生长及群体维持的影响.结果显示,采样区域(梅梁湾M1、M2和贡湖湾G1、G2)背景浊度值较高,水下光谱偏向黄红光波段.室内模拟实验显示,微囊藻群体在不同色光下培养24d后,红光组群体粒径高于蓝光组和白光对照组.并且,红光有利于提高微囊藻群体多糖含量(总多糖和固着性胞外多糖).不同色光培养单细胞铜绿微囊藻(Microcystis aeruginosa FACHB-469)的结果显示,白光对照组的细胞浓度始终最高,其次是红光组,最后是蓝光组.野外监测和室内模拟实验表明,太湖夏季水华期间采样区域偏向黄红光波段的水下光谱有利于微囊藻群体粒径的维持和生长,这是野外群体微囊藻与室内单细胞微囊藻重要的生境差异,可能是微囊藻群体形成和维持的影响因素.
[Abstract]:Based on the investigation of underwater spectra of Meiliang Bay and Gonghu Bay sampling sites in Taihu Lake during the summer of Shui Hua, laboratory simulation experiments of different colors (red light, blue light, white light control) were designed to explore the effect of color light on the growth and population maintenance of microcystis.The results show that the background turbidity of the sampling area (Meiliang Bay M _ 1M _ 2 and Gong Lake Bay G _ 1 / G _ 2) is high and the underwater spectrum is yellowish-red band.The results of laboratory simulation showed that the particle size of red light group was higher than that of blue light group and white light control group.In addition, red light can increase the content of polysaccharide (total polysaccharide and fixed exopolysaccharide) in microcystis.The results of microcystis aeruginosa FACHB-469 showed that the concentration of microcystis aeruginosa FACHB-469 was the highest in the white light control group, followed by the red light group and the blue light group.Field monitoring and laboratory simulation experiments showed that the underwater spectra of the sampling region in the yellow red band during the period of Shui Hua in the Taihu Lake in summer were beneficial to the maintenance and growth of the microcystis population size.This is an important habitat difference between field microcystis and indoor microcystis, which may be the influencing factors for the formation and maintenance of microcystis.
【作者单位】：河海大学环境学院浅水湖泊综合治理与资源开发教育部重点实验室;水利部南京水利水文自动化研究所;
【基金】：国家自然科学基金资助项目(31470507) 江苏省优势学科(PAPD)与品牌专业(TAPP)联合资助
【分类号】：Q948.8;X52

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