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草甘和AMPA如何改变米-鱼系统中的微生物社区结构和循环?

Mengjie Qu¹, Xuan Cheng¹, Qiang Xu²

¹School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, 430023, China.

Environmental research

|July 26, 2024

概括

甘酸盐残留物在水-鱼系统中无处不在,影响微生物群落,并可能改变循环. 这项研究表明,草甘可以通过促进特定的微生物基因来增加稳定的产量.

科学领域:

环境化学环境化学
生态毒理学生态毒理学
微生物生态学微生物生态学

背景情况:

草甘是农业中广泛使用的除草剂,特别是在大米-鱼养殖系统中.
人们担心草甘有可能破坏循环和微生物社区结构.
在水-鱼综合系统中草甘残留物的特定影响在很大程度上仍然没有特征.

研究的目的:

研究草甘及其代谢物氨基甲基酸 (AMPA) 的空间和时间分布.
阐明草甘影响微生物群落和生态系统中的循环的机制.
为这些系统中草甘的生态风险评估提供科学基础.

主要方法:

在田,繁殖沟,以及在-鱼系统中的充电河流中进行现场采样.
在水和土壤/沉积物样本中的草甘和AMPA度的量化.
微生物群落结构 (基因丰富度) 和分量的分析.
统计相关性分析将草甘/AMPA度与微生物和参数联系起来.

主要成果:

在所有采样的水-鱼环境中检测到100%的甘酸盐和AMPA.
在草甘/AMPA度和特定微生物群体 (如RBG-16-58-14,Actinobacteria,Lysobacter) 之间观察到显著的正相关性.
草甘度与有机降解基因 (phoD) 和无机释放基因 (ppx) 的丰富性以及与Ca-结合的度正相关,表明增强了稳定的产量.

结论:

草甘残留物在水-鱼系统中持久且广泛存在.
草甘影响微生物群落的组成和与代谢相关的功能.
除草剂可能通过调节微生物基因表达来间接促进稳定的无机的产生.

关键词:

氨基甲基酸氨基甲基酸.细菌社区的细菌社区草甘是一种天然的草甘.循环是的循环之一.米 - 鱼系统

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