State Key Laboratory of Biocontrol, School of Ecology, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong 518107, China.
School of Civil and Environmental Engineering, Ningbo University, Ningbo, Zhejiang 315211, China.
Sci Total Environ. 2024 Feb 10;911:168793. doi: 10.1016/j.scitotenv.2023.168793. Epub 2023 Nov 22.
Soil warming can directly affect the microbial community, or indirectly affect the microbial community by affecting soil moisture, nutrient availability, vegetation growth, etc. However, the response of microorganisms to soil warming is complex, and there is no uniform conclusion on the impact and mechanism of warming on microbial diversity. As the global climate gradually warms, a comprehensive assessment of warming on soil microbial community changes is essential to understand and predict the response of microbial geochemical processes to soil warming. Here, we perform a meta-analysis of studies to investigate changes in soil microbial communities along soil warming gradients and the response of soil microbes to elevated temperature in different ecosystems. We found that the α diversity index of soil microorganisms decreased significantly with the increase in temperature, and the β diversity altered with the increase in soil temperature and the shifts in ecosystem. Most bacteria only alter when the temperature rises higher. Compared to the non-warming condition, the relative abundance of Acidobacteria, Proteobacteria, Bacteroidetes, Planctomycetes and Verrucomicrobia decreased by 19 %, 11 %, 19 %, 8 % and 6 %, respectively, and the relative abundance of Firmicutes increased by 34 %. Compared to farmland, forest, grassland and tundra ecosystems, soil microorganisms in wetland ecosystems were more sensitive to temperature increase, and the changes in bacteria were consistent with the overall alterations. This meta-analysis revealed significant changes in the composition of microbial communities on soil warming. With the decrease in biodiversity under increasing temperature conditions, these dominant microbiomes, which can grow well under high-temperature conditions, will play a stronger role in regulating nutrient and energy flow. Our analysis adds a global perspective to the temperature response of soil microbes, which is critical to improving our understanding of the mechanisms of how soil microbes change in response to climate warming.
土壤变暖会直接影响微生物群落，也会通过影响土壤水分、养分供应、植被生长等间接影响微生物群落。然而，微生物对土壤变暖的响应是复杂的，对于变暖对微生物多样性的影响和机制尚无统一结论。随着全球气候逐渐变暖，全面评估变暖对土壤微生物群落变化的影响对于了解和预测微生物地球化学过程对土壤变暖的响应至关重要。在这里，我们进行了一项荟萃分析研究，以调查土壤微生物群落沿土壤变暖梯度的变化以及不同生态系统中土壤微生物对高温的响应。我们发现，土壤微生物的 α 多样性指数随温度升高显著降低，β 多样性随土壤温度升高和生态系统的变化而改变。大多数细菌只有在温度升高更高时才会发生变化。与非变暖条件相比，酸杆菌门、变形菌门、拟杆菌门、浮霉菌门和疣微菌门的相对丰度分别下降了 19%、11%、19%、8%和 6%，厚壁菌门的相对丰度增加了 34%。与农田、森林、草地和苔原生态系统相比，湿地生态系统中的土壤微生物对温度升高更为敏感，细菌的变化与整体变化一致。这项荟萃分析揭示了土壤变暖对微生物群落组成的显著影响。随着温度升高条件下生物多样性的减少，这些在高温条件下生长良好的优势微生物组将在调节养分和能量流动方面发挥更强的作用。我们的分析为土壤微生物对温度的响应增加了全球视角，这对于提高我们对土壤微生物如何响应气候变暖而发生变化的机制的理解至关重要。
