功能组分布形状 降解的陆地和海洋溶解有机物质的化学性质
Rebecca R Matos1, Alexander Craig2,3, Boris P Koch4,5
1Department of Environmental Analytical Chemistry, Helmholtz Centre for Environmental Research - UFZ, Permoserstr. 15, Leipzig D-04318, Germany.
Environmental science & technology
|December 1, 2025
概括
泥炭孔水中的溶解有机物 (DOM) 在结构上比海水更复杂. 生态系统特异性降解途径影响全球碳循环,基于DOM分子结构.
科学领域:
- 环境化学环境化学
- 生物地质化学生物地质化学
- 有机地化学 有机地化学
背景情况:
- 溶解有机物 (DOM) 对全球碳循环至关重要.
- 它的分子复杂性和整个生态系统的降解途径仍然不太清楚.
研究的目的:
- 通过实验评估陆地和海洋DOM的结构多样性.
- 调查DOM周转和退化的因素.
主要方法:
- 使用多方法方法来进行DOM分析.
- 陆地泥炭孔水 (PPW) 和表面海水 (SSW) 的比较.
- 分析了碳基组,非碳基氧原子和同位素分散度指数.
主要成果:
- 陆地PPW显示出比海洋SSW更大的结构复杂性和异构体多样性.
- 新鲜的DOM标记 (POSIDEG) 在两个环境中都有相似的结构.
- 退化的DOM标记物 (NEGIDEG) 显示了生态系统特定的基基组分布.
结论:
- DOM退化途径是生态系统特定的.
- DOM的分子结构显著影响全球碳循环.
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