金香琴;杨萌尧;何春光;边红枫;盛连喜;

• 1:东北师范大学环境学院国家环境保护部湿地生态与植被恢复重点实验室

摘要(Abstract)：

多环芳烃有机污染物的环境问题日益严重,亟待需求从群落及生态系统的角度进行毒理学复合危害效应的研究。本文采用以美人蕉(Canna indica)种植根区水培养斜生栅藻(Scenedesmus obliquus)的方式,观察菲胁迫下其生长的变化。结果表明,美人蕉种植根区水对斜生栅藻生长具有化感效应,且表现为"低促高抑"的现象。而在菲胁迫下,种植根区水比例为15%和30%时随着菲浓度的增加,生长促进作用增强,且在菲浓度为1 mg·L-1出现最高值;在100%种植根区水时随着菲浓度的增加生长抑制作用增强。说明,菲胁迫使美人蕉种植根区水对藻类的化感效应增强。进行逻辑斯谛生长拟合发现,30%、1 mg·L-1处理组种群内禀增长率最高,斜生栅藻种群出现暴发增长的生态风险最大。

关键词(KeyWords)： 菲;斜生栅藻;美人蕉;化感效应;逻辑斯谛生长拟合

Abstract:

Keywords:

基金项目(Foundation): 国家水体污染控制与治理重大科技专项子课题(2012ZX07201-001-03);; 东北师范大学国家级生态学实验教学示范中心开放基金

作者(Author): 金香琴;杨萌尧;何春光;边红枫;盛连喜;

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