微塑料对Perna viridis肠道微生物群的尺寸相关影响
Junnan Li1, Mui-Choo Jong2, Hao Hu3
1School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Energy and Environmental Sustainability Solutions for Megacities, Campus for Research Excellence and Technological Enterprise, Singapore 138602, Singapore.
Journal of hazardous materials
|May 29, 2024
概括
微塑料污染会伤害贝,改变它们的肠道细菌并损害能量代谢. 这些影响即使在塑料被清除后也持续存在,对海洋生态系统和人类消费者构成风险.
科学领域:
- 海洋生物学 海洋生物学
- 环境科学 环境科学
- 微生物组研究 微生物组研究
背景情况:
- 微塑料对海洋生物构成重大威胁,特别是像贝这样的双生物.
- 两动物积累了微塑料,可能会破坏它们的肠道健康和恒常性.
- 水产养殖实践可能会导致养殖中的微塑料负载较高.
研究的目的:
- 评估新加坡野生和养殖中的微塑料丰度.
- 为了研究纳米到微尺度聚烯对鱼肠道微生物群的尺寸依赖性影响.
- 了解微塑料暴露对的功能和代谢影响.
主要方法:
- 野外采样野生和养殖贝用于微塑料分析.
- 使用聚烯微塑料 (0.5μm,5μm,50μm) 的实验室暴露实验.
- 超基因组学分析以评估微生物组合和功能变化.
- 分析与新陈代谢和运输有关的基因表达.
主要成果:
- 养殖贝的微塑料含量高于野生贝.
- 微塑料暴露显著改变了螺旋菌和蛋白质菌的丰富性,促进了病原性物种.
- 纳米塑料 (0.5微米) 是对贝微生物组最具破坏性的.
- 微塑料暴露通过影响氧化酸化和增加跨膜转运体,损害了能量代谢.
- 观察到的微生物组失调和代谢障碍在净化期后仍然存在.
结论:
- 微塑料污染,特别是纳米塑料,会以大小依赖的方式在贝中引起显著的肠道失调.
- 微塑料暴露会改变微生物群落的结构和功能,影响宿主代谢,并可能增加病原性.
- 这些影响的持续性表明贝微生物组缺乏弹性.
- 在水产养殖中增加塑料的使用可能会加剧这些问题,对两动物的健康和潜在的人类消费者构成风险.
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