了解中国两个亚高山森林的树中的积情况
Xiaohui Li1, Dan Hu1, Jie Du2
1College of Life Science, Sichuan Normal University, No. 1819, Chenglong Road, Chengdu, Sichuan 610101, China.
Journal of hazardous materials
|April 16, 2024
概括
森林积累了大量的 (Hg),特别是在树干上. 它们独特的生物和化学特性影响了这种吸收,突出了它们在森林循环中的作用.
科学领域:
- 环境科学 环境科学
- 生物地质化学生物地质化学
- 生态毒理学 生态毒理学
背景情况:
- 森林生态系统在全球 (Hg) 生物地球化学循环中发挥着至关重要的作用.
- 垃圾降落通常用于评估森林Hg下水槽功能,但这种方法有局限性.
研究的目的:
- 研究来自中国西南部偏远亚山森林的堆积特征和影响因素.
- 评估作为潜在的沉入森林生态系统中的作用.
主要方法:
- 分析来自不同微生物息地 (如树干) 的样本中的总 (THg) 和甲基 (MeHg) 度.
- 评估影响Hg积累的物种,基质类型和生物化学成分 (例如,阴离子交换能力,pectin,尿酸,metallothionein).
主要成果:
- 在亚山森林中观察到高Hg积累 (平均THg:82 ± 49 ng g-1,MeHg:1.3 ± 0.8 ng g-1).
- 与其他基质相比,树干上的显示出明显更高的Hg积累 (THg: 132 ± 56 ng g-1,MeHg: 1.6 ± 0.2 ng g-1).
- 的物种,基质和叶子的生物化学特性 (CEC,pectin,尿酸,金属氨酸) 显著影响了Hg的积累.
结论:
- ,特别是树干上的,是亚高山森林中的重要蓄积物.
- 这些发现表明,在评估森林中大气中的沉积时,应考虑对积累的贡献.
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