海底微塑料的分布
Shiye Zhao1, Karin F Kvale2, Lixin Zhu3,4
1Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan. szhao@jamstec.go.jp.
Nature
|April 30, 2025
概括
海洋塑料污染是一个全球性问题. 这项研究揭示了海洋深处的微塑料分布,发现较小的颗粒广泛分布,而较大的颗粒则集中在分层层中,影响颗粒有机碳水平.
科学领域:
- 海洋科学
- 环境科学
- 海洋学
背景情况:
- 海洋塑料污染是一个重大的全球挑战,微塑料 (1微米5毫米) 是最丰富的塑料类型.
- 目前的研究主要集中在表面的微塑料度上,
研究的目的:
- 综合全球微塑料深度资料以了解它们在海洋水柱中的分布和运输机制.
- 研究微塑料大小与深度分布之间的关系.
- 评估微塑料对有机碳颗粒的贡献.
主要方法:
- 在2014年至2024年期间全球收集的1,885个站点的综合数据.
- 在各种海洋深度分析了微塑料的数量和分布.
- 小 (1μm100μm) 和大 (100μm5,000μm) 微塑料的分布模式进行比较.
主要成果:
- 在水柱中,微塑料的含量从10−4到104颗/立方米不等.
- 较小的微塑料呈现出更均的深度分布,
- 较大的微塑料集中在分层层和在顶部100米内的中转积聚区.
- 微塑料是可测量的有机碳颗粒,在30米的深度上从0.1%增加到2000米的5%.
结论:
- 微塑料的分布取决于大小,在地下存在很大.
- 中环积聚区延伸到更深的水域, 主要含有更大的微塑料.
- 采样方法的标准化对于准确评估微塑料的分布和海洋影响至关重要.
相关概念视频
01:06Primary Production
23.4K
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
23.4K
01:22The Sulfur Cycle
43.3K
Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
43.3K