A global meta-analysis of soil respiration in response to elevated CO2
文献类型：期刊论文
| 作者 | Liu, Junjie; Fan, Bo; Sun, Zhongyi; Dai, Licong; Duan, Abing |
| 刊名 | SOIL BIOLOGY & BIOCHEMISTRY
 |
| 出版日期 | 2025 |
| 卷号 | 203 |
| 关键词 | elevated CO 2 Soil respiration Terrestrial ecosystem Soil carbon dynamics Meta-analysis |
| 英文摘要 | Soil respiration (Rs) is a crucial component of the terrestrial ecosystem carbon (C) cycle, which significantly regulates atmospheric CO2 concentrations. Although previous studies have suggested potential impacts of rising atmospheric CO2 concentrations on Rs, most of these studies are limited in geographic distribution and variability in CO2 exposure techniques. Globally, particularly across climatic conditions and vegetation types, resulting in the response of Rs to elevated CO2 (eCO2) remains poorly understood. In this study, 1191 paired observations from 207 published experimental eCO2 studies were synthesized to quantify the response of Rs and its related factors to eCO2. The results showed that eCO2 significantly increased root biomass (32%), soil organic carbon (SOC, 3.6%), and soil water content (SWC, 9.6%), leading to an overall increase in Rs by 23%. Moreover, the impacts of eCO2 on Rs varied significantly across climate conditions and vegetation types. The positive effects of eCO2 on Rs in humid regions (26%) were higher than that in arid regions (14%), primarily due to differences in climatic conditions. Furthermore, eCO2 increased Rs in forest ecosystems (28%) was higher than that in grassland ecosystems (15%). Additionally, Rs was positively correlated with the magnitude of eCO2. However, the response of Rs to eCO2 duration exhibited a convex relationship, indicating that the positive effect of CO2 on Rs may diminish when extended experimental durations. Our findings suggest that the effects of eCO2 on Rs will vary significantly across ecosystems and climate regions. In summary, our study provides a scientific basis for enhancing the accuracy of soil C cycling models and informing effective climate change policies. |
| 源URL | [http://210.75.249.4/handle/363003/62533]  |
| 专题 | 西北高原生物研究所_中国科学院西北高原生物研究所 |
| 推荐引用方式 GB/T 7714 | Liu, Junjie,Fan, Bo,Sun, Zhongyi,et al. A global meta-analysis of soil respiration in response to elevated CO2[J]. SOIL BIOLOGY & BIOCHEMISTRY,2025,203. |
| APA | Liu, Junjie,Fan, Bo,Sun, Zhongyi,Dai, Licong,&Duan, Abing.(2025).A global meta-analysis of soil respiration in response to elevated CO2.SOIL BIOLOGY & BIOCHEMISTRY,203. |
| MLA | Liu, Junjie,et al."A global meta-analysis of soil respiration in response to elevated CO2".SOIL BIOLOGY & BIOCHEMISTRY 203(2025). |
入库方式： OAI收割
来源：西北高原生物研究所
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