相关实验视频

Updated: Jul 6, 2025

Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures

Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures

Published on: January 7, 2019

在环境梯度沿着溶解有机物质的普遍微生物再加工

Erika C Freeman¹, Erik J S Emilson^2,3, Thorsten Dittmar^4,5

¹Ecosystems and Global Change Group, Department of Plant Sciences, University of Cambridge, Cambridge, CB2 3EA, UK. erika.freem@gmail.com.

Nature communications

|January 3, 2024

概括

土壤将碳输入淡水,这影响了它们的碳吸收能力. 微生物转化植物化合物,导致跨环境的普遍,难以降解的溶解有机物 (DOM).

科学领域:

环境科学环境科学
土壤科学土壤科学
生物地质化学生物地质化学

背景情况:

土壤是主要的碳储存库,但由于溶解有机物 (DOM) 的碳损失增加到淡水中,威胁到了这一作用.
了解DOM降解过程对于预测碳循环和缓解气候变化至关重要.
目前对不同环境中DOM转换的知识仍然有限.

研究的目的:

为了研究沿着土壤-水上梯度的溶解有机物 (DOM) 转化的一般模式.
识别森林流域DOM变化的微生物和物理化学驱动因素.
评估DOM降解过程在不同环境中的普遍性.

主要方法:

使用超高分辨率质谱分析DOM组成.
追踪DOM在森林流域的土壤深度和山坡位置上的变化.
与土壤微生物组和物理化学条件相关的DOM组成.

主要成果:

在DOM组合中,无论环境特点如何,土壤-水性梯度的趋势都相似.
碳水化合物类和不和碳水化合物类化合物在丰富度加权质量上增加.
降解植物性碳水化合物的基因表达解释了这些化合物中50%以上的变异.

结论:

植物衍生化合物的微生物转化导致DOM越来越多地被反抗性,通用化合物所主导.
这些退化模式可以在整个生态系统和规模上推广,从陆地到海洋.
了解这些过程可以改善DOM反应性的预测,并告知土壤到流的碳损失管理.

更多相关视频

Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems

Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems

Published on: October 29, 2016

Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers

Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers

Published on: March 24, 2023

相关概念视频

Bioremediation

Bioremediation

Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.

What are Biogeochemical Cycles?

What are Biogeochemical Cycles?

The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.