微塑料诱导的生物流和氧气透深度在潮下沉积物的变化
Aaron Ridall1, Adele Maciute2, Francisco J A Nascimento3
1Department of Biological Science, Florida State University, 319 Stadium Dr., Tallahassee, FL 32306, USA; Florida State University Coastal and Marine Laboratory, 3618 Coastal Highway 98, St Teresa, FL 32358, USA.
Marine pollution bulletin
|October 16, 2024
概括
微塑料 (MPs) 显著影响沉积物中生物,这是地球上最丰富的动物. 这项研究揭示了MPs改变了生物流和氧气水平,影响了关键的生态系统功能.
科学领域:
- 海洋生态海洋生态学
- 环境科学 环境科学
- 生态毒理学 生态毒理学
背景情况:
- 对生物地化学循环至关重要的间歇性生物群众丰富,但对微塑料 (MP) 影响的研究不足.
- 梅奥动物群的小尺寸 (<500微米) 表明它们对海洋沉积物中微塑料污染的脆弱性很高.
研究的目的:
- 量化现实的微塑料污染水平对沉积物生物流,氧气透深度 (OPD) 和扩散氧气吸收 (DOU) 的影响.
- 评估微塑料污染对生态系统的关键功能所产生的生态后果.
主要方法:
- 沉积物中等宇宙被微塑料污染在现实的水平上.
- 在13天内测量了生物流深度,氧气透深度 (OPD) 和扩散氧气吸收 (DOU).
- 在微塑料处理的沉积物和对照沉积物之间进行了比较.
主要成果:
- 随着时间的推移,生物化深度和OPD一般增加,而DOU在所有治疗中随着时间的推移而减少.
- 与对照组相比,受微塑料污染的沉积物表现出降低的生物流深度和略微增加的OPD.
- 最高的微塑料度导致生物流的增加,可能是由于 meiofauna 逃避反应.
结论:
- 微塑料污染改变了沉积物生态系统的关键功能,包括生物流和氧气动态.
- 微塑料对生物群的压力可以减少生物流,而逃避反应可能会在更高度下增加它.
- 观察到的生物流,OPD和DOU的转变证实了微塑料对海洋沉积物生态系统的重大影响.
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