南极植被中的作为吸收路线和生物可用形式的指标
Aleksandra Cichecka1, Dominika Saniewska1, Patrycja Płońska1
1University of Gdańsk, Faculty of Oceanography and Geography, Al. Piłsudskiego 46, Gdynia 81-378, Poland.
Journal of hazardous materials
|February 4, 2026
概括
南极植物显示出明显的 (Hg) 积累路径. 体显示大气中的高Hg,而血管植物表明土壤衍生的输入,突出植物作为Hg哨兵.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 地质化学 地质化学
背景情况:
- (Hg) 是一种持久的全球污染物,具有显著的毒性和远程运输潜力.
- 由于极地生态系统对环境变化的敏感性,了解极地生态系统中的积是至关重要的.
研究的目的:
- 为了研究南极海岸植物中的度,化学物种和稳定的同位素特征.
- 评估大气,地质和生物源Hg输入在植物积累中的相对重要性.
- 评估不同类型的植物作为Hg来源指标的作用.
主要方法:
- 在,,血管植物和 * Prasiola crispa * 地毯中分析总Hg (THg) 和甲基 (MeHg) 度.
- 稳定同位素分析 (δ13C和δ15N) 以推断Hg来源和通路.
- 在2018/19澳洲夏季在乔治王岛进行现场采样.
主要成果:
- 体表现出Hg度最高 (中位数为116.6 ng/g),MeHg分数显著 (17%),表明长期在大气中沉积.
- 和P. crispa的Hg水平较低,与大气和水文输入相一致.
- 血管植物具有最低的Hg度 (中位数为22.8 ng/g),有证据表明土壤衍生,有机菌的输入.
结论:
- 南极的植被表现出明显的Hg暴露途径,作为大气和生物原生Hg的宝贵哨兵.
- 植物中独特的Hg积累模式为极地陆地生态系统中的Hg动态提供了洞察力.
- 需要进一步的研究整合Hg同位素和水文数据,以完全解决Hg来源和转换.
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