海洋生物化驱动全球微塑料循环和生物暴露风险
Chunhui Liu1, Muhammad Waseem2, Rui Ma1
1Key Laboratory of Pollution Processes and Environmental Criteria/Carbon Neutrality Interdisciplinary Science Centre, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
Environmental science & technology
|December 2, 2025
概括
海洋沉积物是微塑料的沉降池,威胁着底层生物. 过器料堆积的微塑料比移动采集器更多,而生物流会影响它们的命运和暴露.
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:
- 海洋沉积物充当了微塑料的最终沉积点,对全球地生态系统构成重大威胁.
- 了解盆地环境中的微塑料污染对于评估生态风险至关重要.
研究的目的:
- 建立第一个关于盆地生物和沉积物中微塑料污染的全球综合数据库.
- 阐明盆地生物流对微塑料命运和运输的调节机制.
- 研究微塑料积累的时空变化和生态驱动因素.
主要方法:
- 编制了一个全球数据库,包含1697个地生物样本 (203个物种) 和3724个海洋大陆架沉积物样本.
- 利用现场环境数据来分析生物流对微塑料命运的影响.
- 在不同的功能性养群体 (过式养者与移动采集者) 之间比较了微塑料的积累.
主要成果:
- 过物种比移动采集者积累的微塑料要多得多,这表明了特定功能组的相互作用.
- 生物流起着双重作用,促进微塑料沉积到更深的沉积物中,并增加生物体的暴露.
- 溶解氧和温度被确定为生物流强度和微塑料生物积累的关键调节剂.
- 在高度地区,半封闭海域,亚太地区和墨西哥湾观察到更高的微塑料积累,特别是在冬季.
结论:
- 岩生物流显著影响海洋环境中的微塑料的命运,运输和生态调节.
- 环境因素,如溶解氧和温度驱动微塑料污染的时空变化.
- 这些发现为预测气候变化下的微塑料污染风险和为地生态系统开发适应性管理策略提供了关键证据.
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