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引用本文:曹焕生,孔繁翔,谭啸,杨州,张民,邢鹏.太湖水华蓝藻底泥中复苏和水柱中生长的比较.湖泊科学,2006,18(6):585-589. DOI:10.18307/2006.0605
CAO Huansheng,KONG Fanxiang,TAN Xiao,YANG Zhou,ZHANG Min,XING Peng.Comparison of recruitment from sediments with pelagic growth of cyanobacteria in Lake Taihu, China. J. Lake Sci.2006,18(6):585-589. DOI:10.18307/2006.0605
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太湖水华蓝藻底泥中复苏和水柱中生长的比较
曹焕生1,2, 孔繁翔1, 谭啸3, 杨州3, 张民1,2, 邢鹏1,2
1.中闰科学院南京地理与湖泊研究所, 南京210008;2.中国科学院研究生院, 北京100049;3.南京师范大学生命科学学院, 南京210097
摘要:
为了研究太湖底泥中蓝藻的复苏和水柱中的生长,作者自行设计了原位藻类复苏收集器和生长培养器并安放在太湖梅梁湾监测蓝藻复苏释放和生长.实验在藻类的复苏期(2005年3-6月)进行.结果表明在复苏期太湖蓝藻的复苏呈现波动性增加,4月达到最大量.水柱中蓝藻同步的比生长率和生长量也呈现波动性上升,并在5月初达到最大值.浮游动物的存在并没有对蓝藻的生长造成显著的影响.对底泥蓝藻释放和水柱生长进行比较,底泥释放的蓝藻只占藻类生长量的很小一部分(<2.5%).所以,水柱中蓝藻的生长对其优势的确立和水华的形成具有重要的作用,今后的研究将主要集中在水柱中蓝藻的动态变化
关键词:  蓝藻  藻蓝素  复苏  生长率  太湖
DOI:10.18307/2006.0605
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资助项目(2002CB412305);中国科学院百人计划;南京地理与湖泊研究所所长基金联合资助.
Comparison of recruitment from sediments with pelagic growth of cyanobacteria in Lake Taihu, China
CAO Huansheng1,2, KONG Fanxiang1, TAN Xiao3, YANG Zhou3, ZHANG Min1,2, XING Peng1,2
1.Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;2.Graduate School of Chinese Academy of Sciences, Beijing 100039, P. R. China;3.(Schoot of Life Science, Nanjing Normal University, Nanjing 210097, P. R. China
Abstract:
Cyanobacteria recruitment from sediments is an important seed bank for their pelagic abundance. We esli-mated cyanobacteria recruitment from sediments with migration traps in Lake Taihu from March to June2005, measured in situ growth rate of cyanobacteria in the water column in specially designed chambers, and compared the sizes of both processes. Meanwhile the effect of zooplankton grazing on cyanobacteria growth rate was also measured. Cyanobacteria recruitment increased wilh some degree of fluctuation from March to June, peaking in April; in situ grow ill rate of cyanobacteria also showed a general increase at the same time, only reached maximum in early May. No obvious effect of zoop tank ton grazing was observed on the in situ cyanobacteria growth rate. Cyanobacteria recruitment only art'ounled for a small portion of the pelagic growth (<2.5%) thereby suggesting that future research on cyanohaoteria hlooni (ievelop-ment be focused on the pelagic populations in water column.
Key words:  Cyanobacteria  phyoooyanin  recruitment  growth rate  Lake Taihu
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