微塑料通过微生物变化威胁到海草的碳汇
Luis G Egea1, Rocío Jiménez-Ramos1, Lucía Rodríguez-Arias2
1Departamento de Biología, Facultad de Ciencias del Mar y Ambientales, Instituto Universitario de Investigación Marina (INMAR), Campus de Excelencia Internacional del Mar (CEI·MAR), Universidad de Cádiz, Puerto Real, Cádiz, Spain.
Marine pollution bulletin
|September 2, 2025
概括
微塑料通过减缓生长和加速分解来损害鱼草. 这种污染威胁着重要的蓝色碳生态系统的碳捕获能力.
科学领域:
- 海洋生态
- 环境科学
- 生物地质化学
背景情况:
- 海草床是重要的蓝色碳生态系统.
- 微塑料污染对它们的碳捕获能力构成重大威胁.
研究的目的:
- 研究微塑料 (MP) 和营养丰富 (NE) 对鱼草 (Zostera marina) 的影响.
- 评估对植物性能,微生物组合和碎片分解的影响.
主要方法:
- 进行了为期28天的中宇宙实验.
- 测试中的MP度 (320 mg/100 g DW沉积物) 和NE (70 mg N/100 g DW沉积物).
- 评估了60天的植物生长,微生物群落转移和碎片分解.
主要成果:
- MPs显著降低了草的叶子生长 (-39%),净产量 (-57%) 和根茎延长 (-35%).
- 营养丰富改变了微生物组合.
- 通过促进特定的微生物种群,MP加速了碎片的分解 (1.5倍).
- MPs减少了硫循环细菌, 破坏了重要的 REDOX 过程.
结论:
- 微塑料会对鱼的健康和功能产生负面影响.
- 通过改变植物生长和微生物过程,
- 迫切需要采取政策来应对塑料污染,保护海草生态系统服务.
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