Impacts of meteorological drought on peak vegetation productivity of grasslands from perspectives of canopy structure and leaf physiology
文献类型：期刊论文
| 作者 | Bai, Wenrui3,4; Wang, Huanjiong4; Xiao, Jingfeng2; Li, Xing1; Ge, Quansheng4 |
| 刊名 | INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
 |
| 出版日期 | 2025-03-03 |
| 卷号 | N/A |
| 关键词 | Meteorological drought Grassland Gross primary productivity Solar-induced chlorophyll fluorescence Canopy structure Light use efficiency |
| ISSN号 | 0020-7128 |
| DOI | 10.1007/s00484-025-02880-0 |
| 产权排序 | 1 |
| 文献子类 | Article ; Early Access |
| 英文摘要 | Frequent drought events greatly decrease the gross primary productivity (GPP) and disturb the carbon dynamics of ecologically fragile grassland ecosystems. While GPP is controlled both by canopy structure-related fraction of absorbed photosynthetically active radiation and leaf physiology-related light use efficiency, the underlying mechanisms of drought-induced decline in photosynthetic capacity remain unclear in grassland ecosystems. Here, we used ground-observed maximum GPP based on flux tower (GPPpeak) and satellite-retrieved maximum solar-induced chlorophyll fluorescence (SIFpeak) within each year as the proxy of photosynthetic capacity of alpine grasslands (AG) and temperate grasslands (TG) in China. We first decomposed GPPpeak and SIFpeak into radiation, structure, and physiological components, and compared their relative changes in drought years versus normal years at both local and regional scales. Results showed that declines in GPPpeak and SIFpeak under drought were more pronounced in TG due to its more arid climates. In TG, canopy structure was the main component driving photosynthesis loss because of the smaller proportion of carbon allocation to leaves under drought. However, in AG, the decline in leaf physiology was the primary component. Structural equation modeling revealed that changes in structure and physiological components dominated the spatial variance of SIFpeak response to drought in TG and AG, respectively. The alteration in environmental factors under drought could explain most of the spatial variance of changes in canopy structure and leaf physiology. These findings enhance understanding of the mechanisms behind grassland photosynthetic response to drought, providing insights critical for predicting ecosystem carbon balance under climate change. |
| URL标识 | 查看原文 |
| WOS关键词 | INDUCED CHLOROPHYLL FLUORESCENCE ; PHOTOSYNTHESIS ; MECHANISMS ; RESOLUTION ; RADIATION ; RESPONSES ; CLIMATE |
| WOS研究方向 | Biophysics ; Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Physiology |
| 语种 | 英语 |
| WOS记录号 | WOS:001435547700001 |
| 出版者 | SPRINGER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/213277]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 通讯作者 | Wang, Huanjiong |
| 作者单位 | 1.Sun Yat sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R China 2.Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA; 3.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China; 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, 11A Datun Rd, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Bai, Wenrui,Wang, Huanjiong,Xiao, Jingfeng,et al. Impacts of meteorological drought on peak vegetation productivity of grasslands from perspectives of canopy structure and leaf physiology[J]. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY,2025,N/A. |
| APA | Bai, Wenrui,Wang, Huanjiong,Xiao, Jingfeng,Li, Xing,&Ge, Quansheng.(2025).Impacts of meteorological drought on peak vegetation productivity of grasslands from perspectives of canopy structure and leaf physiology.INTERNATIONAL JOURNAL OF BIOMETEOROLOGY,N/A. |
| MLA | Bai, Wenrui,et al."Impacts of meteorological drought on peak vegetation productivity of grasslands from perspectives of canopy structure and leaf physiology".INTERNATIONAL JOURNAL OF BIOMETEOROLOGY N/A(2025). |
入库方式： OAI收割
来源：地理科学与资源研究所
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