Grassland allocate more biomass to belowground organs compared to forests under elevated CO2: A global meta-analysis
文献类型：期刊论文
| 作者 | Chen, Qiaoyan; Dai, Licong; Guo, Xiaowei; Cheng, Siyuan; Hu, Zhongmin |
| 刊名 | PLANT AND SOIL
 |
| 出版日期 | 2025 |
| 关键词 | Elevated CO2 Root-to-shoot ratio Biomass allocation Plant functional traits Meta-analysis |
| 英文摘要 | Background and aims Elevated CO2 (eCO(2)) typically increases plant photosynthesis and productivity through the CO2 fertilization effect (CFE), but the response pattern of plant biomass allocation to eCO(2) remain poorly understood, especially across different vegetation types. Method In our study, we analyzed 639 observation pairs from 120 published articles on global CO2 manipulation experiments through meta-analysis to determine vegetation biomass and its allocation responses to eCO(2). Results eCO(2) significantly enhanced the root-to-shoot ratio (R/S) by 14.25%, indicating a reallocation of resources between root and shoot systems. Belowground biomass (BGB) increased by 36.17%, substantially higher than the 20.43% increase in aboveground biomass (AGB), suggesting preferential carbon allocation to belowground tissues. Additionally, variation in R/S response to eCO(2) were observed across ecosystem types, with stronger positive effects in grasslands (16.17%) than in forests (12.65%). Boosted regression tree analysis identified climate as the dominant factor controlling the response ratio of R/S, accounting for 54.08% of the total variation. In comparison, AGB and BGB increases were greater in forests than in grasslands due to their higher photosynthesis rate and plant water use efficiency under eCO(2) treatment. Furthermore, plant biomass responses were significantly correlated with eCO(2) manipulation magnitude. AGB, BGB, and R/S linearly increased with the magnitude of eCO(2). Conclusions Our findings suggest that rising CO2 levels could modify terrestrial plant biomass allocation strategies, and terrestrial plants could allocate more biomass to belowground organs, especially in grasslands. |
| 源URL | [http://210.75.249.4/handle/363003/62325]  |
| 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 | Chen, Qiaoyan,Dai, Licong,Guo, Xiaowei,et al. Grassland allocate more biomass to belowground organs compared to forests under elevated CO2: A global meta-analysis[J]. PLANT AND SOIL,2025. |
| APA | Chen, Qiaoyan,Dai, Licong,Guo, Xiaowei,Cheng, Siyuan,&Hu, Zhongmin.(2025).Grassland allocate more biomass to belowground organs compared to forests under elevated CO2: A global meta-analysis.PLANT AND SOIL. |
| MLA | Chen, Qiaoyan,et al."Grassland allocate more biomass to belowground organs compared to forests under elevated CO2: A global meta-analysis".PLANT AND SOIL (2025). |
入库方式： OAI收割
来源：西北高原生物研究所
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