热带转移和微塑料对河口食物链模型的影响
Sakthinarenderan Saikumar1, Ravi Mani2, Mirunalini Ganesan1
1Centre for Ocean Research, Sathyabama Ocean Research Field Facility, ESTC Cell - Marine Biotechnology, Sathyabama Institute of Science and Technology, Chennai, Tamilnadu, India.
Journal of hazardous materials
|November 20, 2023
概括
聚烯微塑料 (MPs) 通过海洋食物链转移,在生物体中积累,但不会转移到组织中. 尽管转移率低,但生化压力表明通过海鲜对人类的潜在风险.
科学领域:
- 环境科学 环境科学
- 海洋生物学 海洋生物学
- 生态毒理学 生态毒理学
背景情况:
- 微塑料污染是海洋生态系统日益严重的全球问题.
- 微塑料的热带转移对海洋生物和潜在的人类构成风险.
研究的目的:
- 为了研究聚乙烯微塑料 (MPs) 在模拟河口动物食物链中的食物转移.
- 评估MP在初级,二级和三级消费者的个人影响和生物积累.
主要方法:
- 使用河口食物链模型:Artemia salina (初级),Litopenaeus vannamei (二级) 和Oreochromis niloticus (三级) 进行研究.
- 生物体暴露于1微米聚烯MPs,并在24小时和48小时内监测转移.
- 使用光显微镜和组织病理学检测MP并评估组织分布.
主要成果:
- 在所有暴露的生物体的肠道和便中确认了微塑料.
- 组织病理学显示MPs在肠表皮内,没有转移到其他组织的证据.
- 生物度和生物积累因子因物种和暴露时间而异,在Oreochromis niloticus中价值较高.
结论:
- 虽然MPs没有超越肠道转移,但生物化学应激反应在所有食物营养水平上都被观察到.
- 该研究强调了海洋食物链中微塑料积累的潜力和相关风险.
- 通过食用受污染的海鲜,人类暴露于微塑料的隐性风险存在.
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