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在淡水生物膜上对两个城市压力因素进行实验测试

Romain Vrba¹, Isabelle Lavoie², Nicolas Creusot³

¹INRAE, UR EABX, 50 avenue de Verdun, 33612 Cestas cedex, France; INRS-ETE, 490 rue de la Couronne, Québec, QC G1K 9A9, Canada.

Aquatic toxicology (Amsterdam, Netherlands)

|May 30, 2024

概括

多德二甲基化 (DDBAC) 严重损害水生生物膜,抑制光合作用并改变社区结构. 在这项研究中,夜间人工光 (ALAN) 与DDBAC对生物膜的影响没有显著的相互作用.

科学领域:

环境毒理学环境毒理学
水生生态学水生生态学
生态毒理学生态毒理学

背景情况:

水生生态系统面临越来越多的化学和物理压力,特别是在城市环境中.
生物杀菌剂二甲基二甲基化 (DDBAC) 通过废水进入水生系统,造成毒性风险.
夜间的人工光 (ALAN) 是一个日益增长的城市压力因素,可能会影响水生生物和生物膜功能.

研究的目的:

研究DDBAC和ALAN对光合作用生物膜的单独和联合作用.
评估对生物膜结构,功能和关键生物化学成分的影响.

主要方法:

在人工道中的生物膜被暴露在30mg.L-1DDBAC和/或ALAN中,持续10天.
在水和生物膜中测量了DDBAC度.
评估生物膜光合作用活性,组成,细胞完整性和脂质配置文件.

主要成果:

在2天内,DDBAC显著抑制了90%以上的生物膜光合作用活性,没有恢复.
暴露于DDBAC改变了生物膜结构,减少了绿藻和消除了微生物.
DDBAC损害了藻类细胞完整性,影响了叶绿体和叶绿素,并降低了糖脂含量.

结论:

DDBAC是一种强烈的压力因素,严重降低水生生物膜的功能和结构.
在测量的生物膜终点上,ALAN与DDBAC没有显著的相互作用作用.
这项研究强调了杀菌剂对敏感水生微生物群落的有害影响.

关键词:

艾伦·艾伦是什么意思生物积累生物积累生物积累生物杀戮是一种杀戮.生物膜是一种生物膜.脂质脂质脂质是一种光合作用效率的效率.

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