武汉东湖秋季水体中光合自氧生物膜的生长特性  

Growth Characteristics of Photoautotrophic Biofilm in Donghu Lake in Wuhan.

作　　者：梅琼[1] 吴永红[2] 肖邦定[1] 丰民义[1] 刘剑彤[1] 

机构地区：[1]中国科学院水生生物研究所 [2]中国科学院南京土壤研究所,江苏南京210008

出　　处：《生态与农村环境学报》2007年第2期61-65,共5页Journal of Ecology and Rural Environment

基　　金：国家重点基础研究发展计划项目(2002CB412304);国家自然科学基金(30600084)

摘　　要：利用一种自行设计的光合自氧生物膜采样装置,在武汉东湖(重富营养化湖泊)20和100 cm水深处自然培养和收集光合自氧生物膜,研究其生长发育及活性特点。结果表明:富营养化水体中光合自氧生物膜生长经历了潜伏适应期、增长期、脱落期和恢复生长期4个阶段;光合自氧生物膜生物量、胞外多糖含量、COD含量和脱氢酶活性随培养时间延长呈稳定增长趋势;20 cm水深处光合自氧生物膜生长总体上快于100 cm水深处,并且其生物量和活性也较高;光合自氧生物膜的生理特征与一般天然水体中生长的相似,说明重富营养化水体对生物膜的胁迫作用不明显。Photoautotrophic biofilms were cultured and collected in different water layers of the Donghu Lake of Wuhan City from October to November 2005 in an experiment to study characteristics of their growth and activity. Several parameters including biomass, extracelluar polysaccharides, COD and dehydrogenase, were determined. Results show that the photoautotrophic biofilms in different depths experienced four growth periods like ＂latent adaptation period, growing period, abscising period, and regrowing period＂. The photoautotrophic biofilm growing in the water 20 cm in depth was higher than those in the water 100 cm in depth in growth rate, biomass and activity. The findings indicate that the physiological characteristics of the photoautotrophic biofilm in hypereutrophic water are quite similar to those in the clean natural water and eutrophication doesn＇t have significant effect on the growth of biofilm.

关 键 词：武汉东湖 富营养化 光合自氧生物膜 

分 类 号：X172[环境科学与工程—环境科学] X131.2