作　　者： ; ; ; ; ;

机构地区： 同济大学环境科学与工程学院长江水环境教育部重点实验室

出　　处： 《环境科学与技术》 2013年第S1期45-49,68,共6页

摘　　要： 以铜绿微囊藻为研究对象,在恒温恒光照(27℃,3 000 lx)和模拟太湖流域夏季温度和光照变化2种培养条件下,研究了不同强度的水体扰动对微囊藻生长的影响,探讨扰动对藻类的影响机制。结果表明,不同扰动强度对微囊藻的生长影响具有一定差异,轻微的扰动(100和200 r/min)促进了铜绿微囊藻的生长,延长了对数增长期,这可能是由于微弱的扰动加速了离子向细胞表面的流动,增加了微囊藻对营养盐的吸收;较大强度的扰动(400 r/min)则能制约铜绿微囊藻生长和增殖,可能是由于扰动产生的剪切力影响了微囊藻光合作用效率。水体扰动对微囊藻的影响机制主要在于干预了藻类对生存环境中营养盐和光的吸收利用,这有助于深化水动力对藻类影响机理的认识。 The study focused on Microcystis aeruginosa and conducted two experiments in order to analyze the effect of water disturbance on the growth of the algae and its influencing mechanism.Both experiments were performed in culture conditions,one with constant water temperature(27 ℃) and constant light intensity(3 000 lx) and the other condition simulating natural water temperature and light variations in Taihu Basin.The results indicated that there showed different effects of different water disturbance intensities on the growth of Microcystis aeruginosa.Slight disturbance(100 and 200 r/min) were conducive to the growth of Microcystis and prolonged the time of exponential growth,the mechanism of which might be that slight disturbance accelerated the flowing of ions towards the surface of algae cells,hence the stimulation of nutrients absorbability of Microcystis.However,the growth of Microcystis was relatively inhibited under higher disturbance beakers(400 r/min),where big fluctuation may also affect the photosynthesis of Microcystis and inhibit the algae growth rate.The results indicate that the mechanism of the effect of water disturbance on Microcystis is mainly for the intervention of disturbance on nutrient and light utilization of Microcystis aeruginosa,which will enhance the understanding of affecting mechanism of hydrodymanic processes on algae growth.

关 键 词： 水体扰动 铜绿微囊藻 营养盐 光照

领　　域： [环境科学与工程]