Extreme precipitation causes divergent responses of root respiration to nitrogen enrichment in an alpine meadow
文献类型：期刊论文
| 作者 | Wang, Furong2; Li, Tingting2; Zhang, Ruiyang; Wang, Jinsong; Xu, Meng2; Guo, Hongbo2; Niu, Shuli2; Tian, Dashuan2 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2024-02-20 |
| 卷号 | 912页码:168568 |
| 关键词 | Nitrogen addition Extreme precipitation Root respiration Root trait Alpine meadow |
| DOI | 10.1016/j.scitotenv.2023.168568 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Grassland roots are fundamental to obtain the most limiting soil water and nitrogen (N) resources. However, this natural pattern could be significantly changed by recent co-occurrence of N deposition and extreme precipitations, likely with complex interactions on grassland root production and respiration. Despite this nonlinearity, we still know little about how extreme precipitation change nonlinearly regulates the responses of root respiration to N enrichment. Here, we conducted a 6-year experiment of N addition in an alpine meadow, coincidently experiencing extreme precipitations among experimental years. Our results demonstrated that root respiration showed divergent responses to N addition along with extreme precipitation changes among years. Under normal rainfall year, root respiration was significantly stimulated by N addition, whereas it was depressed under high or low water. Moreover, we revealed that both root biomass and traits (i.e. specific root length) were critical mechanisms in affecting root respiration response, but their relative importance changed with water condition. For example, specific root length and specific root respiration were more dominant than root biomass in determining root respiration response under low water, or vice versa. Overall, this study comprehensively reveals the nonlinearity of root respiration responses to the interactions of N enrichment and extreme water change. These new findings help to reconcile previously conflicting results that obtain in a specific episode of water gradient, with important implications for understanding grassland belowground carbon dynamics in facing combined N deposition and extreme precipitation events. |
| WOS关键词 | PLANT CARBON ALLOCATION ; SOIL RESPIRATION ; DIFFERENTIAL RESPONSES ; CLIMATE EXTREMES ; COMPONENTS ; DEPOSITION ; TEMPERATE ; GRASSLAND ; WATER ; IMPACTS |
| WOS研究方向 | Environmental Sciences & Ecology |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001127455400001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/200986]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Furong,Li, Tingting,Zhang, Ruiyang,et al. Extreme precipitation causes divergent responses of root respiration to nitrogen enrichment in an alpine meadow[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2024,912:168568. |
| APA | Wang, Furong.,Li, Tingting.,Zhang, Ruiyang.,Wang, Jinsong.,Xu, Meng.,...&Tian, Dashuan.(2024).Extreme precipitation causes divergent responses of root respiration to nitrogen enrichment in an alpine meadow.SCIENCE OF THE TOTAL ENVIRONMENT,912,168568. |
| MLA | Wang, Furong,et al."Extreme precipitation causes divergent responses of root respiration to nitrogen enrichment in an alpine meadow".SCIENCE OF THE TOTAL ENVIRONMENT 912(2024):168568. |
入库方式： OAI收割
来源：地理科学与资源研究所
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