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经过气候变化的微塑料改变了深海盆地生物地球化学和有机物循环:来自微观宇宙实验的见解

Claudia Dessì¹, Stefano Aliani², Vincenzo Donnarumma³

¹Dipartimento di Scienze della Vita e dell'Ambiente - Università degli Studi di Cagliari, Via Tommaso Fiorelli 1, 09126, Cagliari, Italy.

Environmental pollution (Barking, Essex : 1987)

|October 5, 2025

概括

深海中的微塑料污染破坏了有机物循环和碳降解. 这项研究揭示了对深海生态系统的重大影响,影响了关键的生物地球化学过程.

科学领域:

海洋生物学海洋生物学
环境科学环境科学
生物地质化学生物地质化学

背景情况:

深海底是塑料污染的主要下沉点,但其对碳循环的影响尚不清楚.
合成聚合物可能通过引入的碳改变深海生态系统功能.

研究的目的:

评估微塑料 (MP) 引起的深海沉积物有机物 (OM) 循环中的变化.
研究聚乙烯,轮胎磨损颗粒和聚合物混合物对碳降解的影响.

主要方法:

在深海沉积物 (530米深) 中脉冲注入经过气候变化的MPs (70-210微米).
在环境相关度 (~0.25%重量) 下,化时间为15,30和45天.
对OM分数,细胞外酶活性 (性酸酶,β-葡萄糖酶),碳水化合物和脂质含量的分析.

主要成果:

经受天气影响的MP显著影响了半性OM分数和细胞外酶活性.
观察到碳降解和周转率有所下降.
轮胎磨损颗粒对碳水化合物,脂质和酶活动产生最显著的影响,而聚合物混合物对单个聚合物的影响不那么强烈.

结论:

微塑料污染破坏了深海的生物地球化学循环,特别是碳循环和降解.
观察到对这些庞大的生态系统的影响可能会产生级联生态效应.
进一步的研究对于了解塑料衍生碳积聚在深海中的长期影响至关重要.

关键词:

碳循环是碳循环的过程.深海生态系统深海生态系统生态系统的运作生态系统的运作塑料污染塑料污染的原因

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