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引用本文:陶益,孔繁翔,曹焕生,张晓峰.太湖底泥水华蓝藻复苏的模拟.湖泊科学,2005,17(3):231-236. DOI:10.18307/2005.0307
TAO Yi,KONG Fanxiang,CAO Huansheng,ZHANG Xiaofeng.Simulative Recruitment of Microcystis from the Surface Sediment in Taihu Lake. J. Lake Sci.2005,17(3):231-236. DOI:10.18307/2005.0307
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太湖底泥水华蓝藻复苏的模拟
陶益1,2, 孔繁翔1, 曹焕生1,3, 张晓峰2
1.中国科学院南京地理与湖泊研究所, 南京 210008;2.南京大学环境学院, 南京 210093;3.中国科学院研究生院, 北京 100039
摘要:
本实验采集太湖梅梁湾底泥及上覆水,在保持底泥表面完整的前提下在实验室中建立湖泊生态系统模拟装置,探索太湖底泥中蓝藻种群的复苏规律经60d光照升温培养,显微观察蓝藻复苏细胞,测定底泥和上覆水中的色素含量.结果表明,在室内模拟条件下,太湖底泥蓝藻复苏初始时主要以2-8个细胞的小群体存在,其细胞直径为7.2-7.8μm,大于夏季的藻群体中的细胞直径(4.8-6μm).底泥蓝藻的复苏过程与环境温度变化密切相关.蓝藻在水体温度达到14℃时开始少量进入水柱中,在环境温度升至18-20℃之间时大量进入水中,为水华形成提供了种源.底泥蓝藻的最佳复苏温度(18-20℃)高于非蓝藻的复苏温度(14-18℃),高温对蓝藻复苏更为有利
关键词:  蓝藻  复苏  温度  底泥  太湖
DOI:10.18307/2005.0307
分类号:
基金项目:国家自然科学基金项目(40471045)国家重点基础研究发展计划项目(2002CB412300)中国科学院南京地理与湖泊研究所所长基金中国科学院百人计划项目共同资助
Simulative Recruitment of Microcystis from the Surface Sediment in Taihu Lake
TAO Yi1,2, KONG Fanxiang1, CAO Huansheng1,3, ZHANG Xiaofeng2
1.Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;2.School of Environment, Nanjing University, Nanjing 210093, P. R, China;3.Graduate School of Chinese Academy of Sciences, Beijing 100039, P. R. China
Abstract:
A simulative experimental appliance was designed to investigate the Microcystis recruitment from surface sediments of Taihu Lake. Intace surface sediments from Taihu Lake were put into the appliance bottom and the filtered lake water of Taihu Lake was gentlely added on preset surface sediments. During the culture period, the recruited cells were observed and photographed with an epi-fluorescence microscope. Meanwhile, effect of temperature on the recruitment of Microcystis colony has been studied. Results showed that under simulative conditions, the recruiting population was composed of 2-8 cells mostly. The cell diameter was about 7.2-7.8 μm, larger than that of the colonial cell in suminer(4.8-6 μm). The recruitment of Microcystis colony firom the sediment was affected significantly by temperature. Microcystis in the sediment started to move into the water column when temperature reached 14℃,. With increasing of temperature, the recruitment rate of Microcystis rose gradually and reached its maximum at 18-20℃. The optimal temperature for recmitment of Microcystis, 18-20℃, is higher than that of other algae, 14-18℃. The re-sults suggested that the enhancement in temperature would be advantageous to the recruitment of Microcystis.
Key words:  Microcystis  recruitment  temperature  sediment  Taihu Lake
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