萼花臂尾轮虫培养滤液对铜绿微囊藻、斜生栅藻和小球藻群体形成及生长的影响

应用生态学报 ›› 2005, Vol. 16 ›› Issue (6): 1138-1141.

萼花臂尾轮虫培养滤液对铜绿微囊藻、斜生栅藻和小球藻群体形成及生长的影响

杨州^1,2,3, 孔繁翔¹, 史小丽¹, 杨家新³

1. 中国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 100039;
3. 南京师范大学生命科学学院, 江苏省生物资源技术重点实验室, 南京 210097

收稿日期:2004-07-13 修回日期:2004-12-01 出版日期:2005-06-15 发布日期:2005-06-15
通讯作者: 孔繁翔
基金资助:
国家自然科学基金项目(30400062)、江苏省自然科学基金项目(BK2004165)、国家重点基础研究发展计划项目(2002CB412305)、中国科学院知识创新工程项目(KZCX2-311)、中国科学院"百人计划"项目和中国科学院南京地理与湖泊研究所所长基金资助项目.

Effects of Brachionus calyciflorus culture media filtrate on Microcystis aeruginosa,Scenedesmus obliquus and Chlorella vulgaris colony formation and growth

YANG Zhou^1,2,3, KONG Fanxiang¹, SHI Xiaoli¹, YANG Jiaxin ³

1. Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;
2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China;
3. Jiangsu Key Laboratory for Bioresource Technology, School of Biological Sciences, Nanjing Normal University, Nanjing 210097, China

Received:2004-07-13 Revised:2004-12-01 Online:2005-06-15 Published:2005-06-15

摘要/Abstract

摘要： 为探索浮游动物和藻类之间可能存在的信息传递,研究了萼花臂尾轮虫培养滤液对铜绿微囊藻、斜生栅藻和小球藻的生长及群体形成的影响.把萼花臂尾轮虫按1000个·L^-1的初始密度置于小球藻中培养24h后,用孔径0.15μm的微孔滤膜抽滤,得到轮虫培养滤液,此滤液中含有轮虫在生活过程中释放的一些信息化学物质.将轮虫培养滤液以20%的比例分别加入纯培养的铜绿微囊藻、斜生栅藻和小球藻中,进行为期7d的试验.结果表明,萼花臂尾轮虫培养滤液能显著地促进斜生栅藻的群体形成,而对铜绿微囊藻和小球藻在群体形成方面没有显著作用.另外,该滤液能显著提高小球藻种群的增长,对铜绿微囊藻和斜生栅藻的生长无明显影响.3种藻类对萼花臂尾轮虫的潜在牧食采取了不同的生态策略:斜生栅藻形成群体,增大摄食阻力,从而降低被摄食的风险;小球藻通过提高增长率来抵消被取食的损失;铜绿微囊藻是通过其它方式来降低被牧食(例如毒素).这些方式分别是这些藻类维持种群规模的反牧食防御策略之一.

关键词: 萼花臂尾轮虫, 培养滤液, 群体形成, 生长, 铜绿微囊藻, 斜生栅藻, 小球藻

Abstract: To examine the possible information transfer by chemicals between zooplankton and algae,this paper studied the effects of Brachionus calyciflorus culture media filtrate on the colony formation and growth of Microcystis aeruginosa,Scenedesmus obliquus and Chlorella vulgaris.The results showed that the test filtrate could significantly promote the colony formation and population growth of S.obliquus,while no significant effect was observed on M.aeruginosa and C.vulgaris.The induced colony formation of S.obliquus increased its resistance to grazing,and thus,reduced the risk of its being grazed,which could be viewed as a kind of inducing defense.The accelerated growth of C.vulgaris and the toxin production of M.aeruginosa could also be interpreted as a defense mechanism against grazing.It maybe concluded that M.aeruginosa,S.obliquus and C.vulgaris could adopt different ecological strategies to resist the potential grazing by rotifer B.calyciflorus,and thus,to keep their population on a certain scale.

Key words: Brachionus calyciflorus, Culture media filtrate, Colony formation, Growth, Microcystis aeruginosa, Scenedesmus obliquus, Chlorella vulgaris

中图分类号:

Q178.1

杨州, 孔繁翔, 史小丽, 杨家新. 萼花臂尾轮虫培养滤液对铜绿微囊藻、斜生栅藻和小球藻群体形成及生长的影响[J]. 应用生态学报, 2005, 16(6): 1138-1141.

YANG Zhou, KONG Fanxiang, SHI Xiaoli, YANG Jiaxin . Effects of Brachionus calyciflorus culture media filtrate on Microcystis aeruginosa,Scenedesmus obliquus and Chlorella vulgaris colony formation and growth[J]. Chinese Journal of Applied Ecology, 2005, 16(6): 1138-1141.

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