Improvement of predicting ecosystem productivity by modifying carbon-water-nitrogen coupling processes in a temperate grassland
文献类型：期刊论文
| 作者 | Cheng, Kai li1,6; Hu, Zhong min2,3; Li, Sheng gong1,6; Guo, Qun1,6; Hao, Yan bin4; Yuan, Wen ping2,5 |
| 刊名 | JOURNAL OF PLANT ECOLOGY
 |
| 出版日期 | 2021-02-01 |
| 卷号 | 14期号:1页码:10-21 |
| 关键词 | gross primary productivity ecosystem model soil water content nitrogen constraint sensitivity grassland ecosystem |
| ISSN号 | 1752-9921 |
| DOI | 10.1093/jpe/rtaa072 |
| 通讯作者 | Hu, Zhong min(huzm@m.scnu.edu.cn) ; Li, Sheng gong(lisg@igsnrr.ac.cn) |
| 英文摘要 | Aims Prediction of changes in ecosystem gross primary productivity (GPP) in response to climatic variability is a core mission in the field of global change ecology. However, it remains a big challenge for the model community to reproduce the interannual variation (IAV) of GPP in arid ecosystems. Accurate estimates of soil water content (SWC) and GPP sensitivity to SWC are the two most critical aspects for predicting the IAV of GPP in arid ecosystems. Methods We took a widely used model Biome-BGC as an example, to improve the model performances in a temperate grassland ecosystem. Firstly, we updated the estimation of SWC by modifying modules of evapotranspiration, SWC vertical profile and field capacity. Secondly, we modified the function of controlling water-nitrogen relation, which regulates the GPP-SWC sensitivity. Important Findings The original Biome-BGC overestimated the SWC and underestimated the IAV of GPP sensitivity, resulting in lower IAV of GPP than the observations, e.g. it largely underestimated the reduction of GPP in drought years. In comparison, the modified model accurately reproduced the observed seasonal and IAVs in SWC, especially in the surface layer. Simulated GPP-SWC sensitivity was also enhanced and became closer to the observations by optimizing parameter controlling nitrogen mineralization. Consequently, the model's capability of reproducing IAV of GPP has been largely improved by the modifications. Our results demonstrate that SWC in the surface layer and the consequent effects on nitrogen availability should be among the first considerations for accurate modeling IAV of GPP in arid ecosystems. |
| WOS关键词 | INTERANNUAL VARIABILITY ; SEMIARID ECOSYSTEMS ; MODEL PREDICTIONS ; USE EFFICIENCY ; TERRESTRIAL ; CLIMATE ; MINERALIZATION ; DYNAMICS ; FORESTS ; ABILITY |
| 资助项目 | National Natural Science Foundation of China[31922053] ; National Key Research and Development Program of China[2017YFA0604801] |
| WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology ; Forestry |
| 语种 | 英语 |
| WOS记录号 | WOS:000606831600002 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | National Natural Science Foundation of China ; National Key Research and Development Program of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/136667]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Hu, Zhong min; Li, Sheng gong |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China 2.Southern Marine Sci & Engn Guangdong Lab, Zhuhai 519082, Peoples R China 3.South China Normal Univ, Sch Geog, Shipai Campus, Guangzhou 510631, Peoples R China 4.Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China 5.Sun Yat Sen Univ, Sch Atmospher Sci, Guangzhou 519082, Peoples R China 6.Chinese Acad Sci, Synth Res Ctr Chinese Ecosyst Res Network, 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 | Cheng, Kai li,Hu, Zhong min,Li, Sheng gong,et al. Improvement of predicting ecosystem productivity by modifying carbon-water-nitrogen coupling processes in a temperate grassland[J]. JOURNAL OF PLANT ECOLOGY,2021,14(1):10-21. |
| APA | Cheng, Kai li,Hu, Zhong min,Li, Sheng gong,Guo, Qun,Hao, Yan bin,&Yuan, Wen ping.(2021).Improvement of predicting ecosystem productivity by modifying carbon-water-nitrogen coupling processes in a temperate grassland.JOURNAL OF PLANT ECOLOGY,14(1),10-21. |
| MLA | Cheng, Kai li,et al."Improvement of predicting ecosystem productivity by modifying carbon-water-nitrogen coupling processes in a temperate grassland".JOURNAL OF PLANT ECOLOGY 14.1(2021):10-21. |
入库方式： OAI收割
来源：地理科学与资源研究所
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