在森林恢复过程中,营养素的可用性推动了微生物功能多样性和土壤有机物分子复杂性之间的生态联系
Jing Zhang1, Tao Wang2, Jun Wang1
1Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China; Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China.
Journal of environmental management
|June 26, 2025
概括
森林恢复提高了土壤有机物分子复杂度. 微生物的功能多样性和生物质是土壤有机碳保存的关键驱动因素,在不同的土壤地平线中发挥着不同的作用.
科学领域:
- 土壤科学 土壤科学
- 生态生态学 生态生态学
- 生物地质化学生物地质化学
背景情况:
- 森林恢复影响土壤有机碳 (SOC) 的保存.
- 土壤有机物分子复杂性 (SOMMC) 和微生物相互作用决定了SOC的动态.
- 在恢复过程中,SOMMC,微生物群落和SOC之间的联系机制尚不清楚.
研究的目的:
- 在热带森林恢复期间调查SOMMC和微生物群落的变化.
- 阐明SOMMC,微生物功能多样性,生物质和SOC含量之间的生态联系.
- 在不同的土壤地平线中确定驱动SOC保存的机制.
主要方法:
- 收集了来自热带森林恢复时间序列的O和A地平线土壤样本.
- 使用热辅助水解和甲基化加上气体染色学和质谱学 (THM-GC-MS) 进行了SOMMC的特征化.
- 使用高通量测序对微生物群落进行分析.
主要成果:
- SOC含量在O地平线下降,但在恢复后在A地平线显著增加.
- 在两个视界中,SOM分子多样性都增加了.
- 微生物的功能多样性和生物量解释了超过50%的SOMMC和SOC变异.
- O-地平线:微生物功能多样性的增加和生物质的减少与较高的SOMMC但较低的SOC有关.
- A-地平线:增加的微生物生物质和功能多样性与更高的SOC和SOMMC相关.
结论:
- 森林恢复增强了SOMMC,这对SOC保护至关重要.
- 微生物的功能多样性和生物质是SOM动态的关键驱动因素.
- 营养素的限制影响了O和A地平线中的明显的微生物-SOC联系.
- 改善营养物质的可用性对于维持微生物功能和在恢复工作中保存SOC至关重要.
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