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微塑料对沉积物-水界面上的形状变化的新见解:地生物流的作用

Xiaojun Song¹, Jiannan Ding², Yunbo Zhang¹

¹School of Environment & Ecology, Jiangnan University, Wuxi 214122, China.

Journal of hazardous materials

|March 16, 2024

概括

微塑料 (MPs) 伤害淡水无脊椎动物,如虫幼虫,破坏它们的食和能量. 这通过降低沉积物中的生物化活动来影响循环.

科学领域:

环境科学环境科学
生态毒理学生态毒理学
生物地质化学生物地质化学

背景情况:

微塑料 (MPs) 在淡水沉积物中普遍存在,对盆地生物构成风险.
在生态系统层面上,PM污染的后果,特别是对营养循环的后果,仍然不太清楚.

研究的目的:

调查聚乳酸 (PLA),聚乙烯二甲 (PET) 和覆盖生物膜的PET (BPET) 微塑料对虫幼虫 (Tanypus chinensis) 的影响.
评估这些微塑料对沉积物 (P) 形状和生物地球化学过程的后续影响.

主要方法:

微观宇宙实验是使用暴露于不同MP类型 (PLA,PET,BPET) 和对照的T. chinensis幼虫进行的.
分析了生物化学反应,代谢途径和沉积物和幼虫中的P形状.
评估了生物流活动,以了解其在P动态中的作用.

主要成果:

在T. chinensis中,MPs引起了肠道阻塞和氧化应激,导致能量耗尽和生物化减少.
在暴露于MPs的幼虫中,内部P负荷增加了 (11.4%的PLA,8.6%的PET,9.0%的BPET).
MP类型影响了P档案,BPET和PLA显示出比PET更显著的影响,与生物可用性和微环境变化有关.

结论:

微塑料破坏了个体无脊椎动物的生理和能量代谢.
由于MPs,奇罗诺米德幼虫的生物化受损改变了沉积物固定.
这项研究将微塑料诱导的生理变化与关键的生态系统服务联系起来,特别是生物地球化学循环.

关键词:

生物污染是一种生物污染.奇罗诺米德幼虫的幼虫微观宇宙是一个微观宇宙.在这里,PET是PET.这就是为什么PLA PLA PLA.

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