全球微/纳米塑料污染与各种淡水微藻污染的系统审查的元分析:毒理效应模式,分类物种特异性反应和潜在的生态风险
Zhonghui Guo1, Jieming Li1, Ziqing Zhang1
1College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China; Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, China.
Water research
|May 18, 2024
概括
微/纳米塑料 (MNP) 伤害淡水微藻,抑制光合作用并破坏细胞. 某些塑料类型和度带来更大的风险,影响藻类群落和水质.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 水生生态学 水生生态学
背景情况:
- 微/纳米塑料 (MNP) 是影响全球淡水生态系统的持久污染物.
- 微藻是重要的初级生产者,容易受到MNP的影响,这可能导致热带污染和水质恶化.
研究的目的:
- 系统地审查和元分析MNP参数 (大小,度,类型) 对微藻的毒理学影响.
- 探索与特定的MNP参数和微藻种群反应变异相关的生态风险.
主要方法:
- 来自63个出版物的1071个观察结果的系统审查.
- 进行元分析和子组分析,以评估MNP影响.
- 探索MNP参数影响和微藻类类的变化.
主要成果:
- 微塑料抑制了微藻的光合作用;纳米塑料导致严重的细胞损伤和毒素释放.
- 增加MNP度 (0-50 mg/L) 逐渐抑制了生长和叶绿素-a,同时增加了毒素的释放.
- 聚胺和聚烯显示出显著的负面影响,而PET和PMMA的影响最小. 细菌植物 (Bacillariophyta) 受到影响最大;叶绿植物 (Chlorophyta) 和蓝植物 (Cyanophyta) 表现出耐受性和弹性.
结论:
- MNPs显著影响微藻光合作用,生长和毒素释放,影响因MNP类型,大小和度而异.
- 特定的微藻类表现出差异性耐受性,其中一些可能在MNP污染下占主导地位.
- 了解这些动态对于评估和管理MNP带来的淡水生态系统风险至关重要.
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