土壤微生物细胞外聚合物质的大陆规模驱动因素
Ke Shi1,2,3,4, Qing Zheng2, Baorong Wang5
1Department of Ecology, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China.
Nature communications
|March 2, 2026
概括
细胞外聚合物物质 (EPS) 是土壤碳中的重要微生物残留物. 它们的丰富程度受岩基和土地利用的影响,影响土壤健康和碳捕获.
科学领域:
- 土壤科学 土壤科学
- 微生物学 微生物学
- 环境科学 环境科学
背景情况:
- 细胞外聚合物物 (EPS) 是重要的微生物残留物,有助于土壤有机碳 (SOC) 和土壤聚合.
- 了解对EPS丰度和功能的大规模控制对于土壤碳循环研究至关重要.
研究的目的:
- 调查不同欧洲环境中EPS的大量和大规模控制.
- 确定基岩,气候和土地利用对EPS含量的影响及其与土壤有机碳和微生物生物质的关系.
主要方法:
- 广泛地采集土壤样本,跨越欧洲的跨度,气候,岩石和土地用途各不相同.
- 对土壤EPS含量,EPS碳 (EPS-C),土壤有机碳 (SOC) 和微生物生物质碳 (MBC) 的量化.
- 统计分析以确定EPS,环境因素和微生物特性之间的相关性.
主要成果:
- 土壤中平均EPS含量为956±55μggg−1土壤,EPS-C对SOC的贡献为1.6±0.1%.
- 贝德罗克显著影响了EPS含量,EPS-C对SOC的贡献,以及EPS-C/MBC比率.
- 土地利用主要影响了EPS-C/MBC比率,与微生物生长和碳利用效率有负相关性,并且在水资源短缺的情况下增加.
结论:
- EPS是一种主要的微生物残留物,受到气候,地表,微生物和土地利用因素的显著调节.
- 床岩和土地利用是EPS动态的主要驱动因素,以及它们对土壤碳的贡献.
- 这些发现对理解土壤碳循环和封存策略有重大影响.
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