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土壤微生物碳利用效率在森林生物群中的热敏度

Chengjie Ren^1,2, Zhenghu Zhou³, Manuel Delgado-Baquerizo⁴

¹State key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Agronomy, Northwest A&F University, Yangling, Shaanxi, China.

Nature communications

|July 25, 2024

概括

土壤微生物土壤微生物

科学领域:

土壤科学土壤科学
微生物生态学微生物生态学
气候变化研究研究气候变化研究

背景情况:

土壤微生物碳利用效率 (CUE) 和其温度敏感性 (CUE_T) 对于土壤碳气候反至关重要.
了解这些微生物过程是预测气候变化下的土壤碳动态的关键.

研究的目的:

在南北森林梯度上量化CUE和CUE_T.
确定土壤微生物CUE和CUE_T变化的主要驱动因素.

主要方法:

使用O-H2O追踪器方法对CUE和CUET进行量化.
沿着南北森林截面进行测量,以捕捉气候变化.

主要成果:

气候成为影响CUE和CUE_T的主导因素,通过土壤特性和微生物社区转移直接和间接地发挥作用.
在寒冷的森林 (<10°C) 中观察到负的CUE_T,在温暖的森林 (>10°C) 中观察到正的CUE_T,表明在适应温度下最佳的微生物功能.
证明微生物CUE可塑性和温度敏感性调节土壤碳反对变暖.

结论:

土壤微生物群落表现出适应气候的CUE和CUE_T,影响土壤碳气候反循环.
这些适应能力表明,在有利的气候条件下,微生物群落可以减轻土壤的碳损失.

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