模拟生态系统中噬藻体裂解蓝藻宿主的生态学效应.PDFVIP

第 26 卷第 6 期 生 态 学 报 Vol. 26, No. 6 2006 年 6 月 ACTA ECOLOGICA SINICA Jun. , 2006 模拟生态系统中噬藻体裂解蓝藻宿主的生态学效应 廖明军, 程 凯, 赵以军* , 杜秀丽, 刘秀菊, 喻 融 ( 华中师范大学城市水资源分配与水环境研究中心, 武汉 430079) 摘要: 实验采用模拟生态系统, 研究了噬藻体裂解蓝藻宿主后营养物质 循环变化的 过程, 以及细菌和 漂浮植物 对这个过程 的影 响。结果表 明噬藻体裂解宿主所释放的营养元素在细菌的作用下迅速 进入新的循 环并形成新 的水华, 而加入 浮萍则可以 有效 吸收水体营 养, 防止新的水华发生。因此推测单 纯地利用 包括噬 藻体在 内的微 生物裂 解藻类 的方法, 并非 治理水 华的有 效方 法, 但如果能够结合漂浮植物等其它治理手段 , 则有可能同时实现水华的控制和水质的改善。 关键词: 噬藻体; 鲍氏织线藻; 浮萍; 细菌; 营养物质 文章编号: 1000-0933(2006) 06-1745-05 中图分类号: Q143, Q178. 1, Q938. 8 文献标识码: A Ecological effects of cyanobacteria lysis by cyanophage in cement ponds * LIAO Ming-Jun, CHENG Kai, ZHAO Y-i Jun , DU Xiu-Li, LIU Xiu-Ju, YU Rong ( Urban Water Resource and Environment Research Center of Huazhong Normal University) . Acta Ecologica Sinica , 2006, 26( 6) :1745~ 1749. Abstract: In order to test ecological effects of Cyanobacteria lysed by Cyanophage on the nutrition cycle of fresh water, an experiment was carried out in six cement ponds with culture of the Plectonema boryanum IU594. Of these ponds, three were inoculated with the Cyanophage PP at 106 PFU#ml- 1 and added the duckweed. The other three ponds were inoculated with the Cyanophage PP only as control. After the treatment, the concentration of chlorophyll a, ammonia, nitrate, phosphate, total phosphorous, total nitrogen, the number of bacteria and the fresh weight of duckweed were monitored. It was found that lysis of Cyanobacteria by Cyanophage caused rapid release of the nutritional elements and brought the bacteria into a new life cycle, and led a new bloom in the