释放土壤微生物群落多样性的潜力,以大规模积累死体碳
Yang Yang1,2, Anna Gunina3,4, Ji Chen1
1State Key Laboratory of Loess Science, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China.
Global change biology
|June 12, 2025
概括
植被恢复通过培育微生物死体C促进土壤有机碳 (SOC) 积累.这个过程是由微生物群落的变化驱动的,有利于增强碳捕集的弹性类型.
科学领域:
- 土壤科学 土壤科学
- 微生物学 微生物学
- 生态生态学 生态生态学
背景情况:
- 微生物是土壤有机碳 (SOC) 形成的关键,主要是通过微生物死体C.
- 土壤微生物群落的多样性使得理解它们在死体积累中的作用变得复杂.
研究的目的:
- 研究微生物群落,死体C和气候梯度的植被恢复之间的关系.
- 确定影响死体C积累的关键微生物种群和土壤特性.
主要方法:
- 利用生物标志物 (氨基糖) 和高通量测序在洛斯高原900公里的梯度.
- 采样了291个地点,包括耕地和恢复类型 (草地,灌木地,林地).
- 分析了土壤特性,微生物多样性,酶活动,以及C. necromass.
主要成果:
- 尸体C,微生物多样性和酶活动随着植被恢复 (农田到森林) 增加.
- 土壤pH,粘土,微生物生物质C和α-1,4-葡萄糖酶是细菌和真菌死体C的重要预测因素.
- 在死体C和微生物多样性 (细菌和真菌) 之间发现了强烈的正线性关系.
- 主导的微生物种群,包括Actinobacteria,Proteobacteria和Bacteroidetes,随着恢复而增加,转向复制性群体.
- 恢复促进了机会性微生物种群,增强了死体C的积累,并促进了土壤C的捕获.
结论:
- 植被恢复通过塑造微生物群落和促进死体C积累,显著影响SOC储存.
- 主导性微生物种类在控制死体变异和代谢残留方面发挥着至关重要的作用.
- 土壤微生物组比以前认为的对死体的贡献更大,突出了微生物生存策略.
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