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| DOI | 10.1016/j.catena.2024.107954 |
| Effect of climate change on the seasonal variation in photosynthetic and non-photosynthetic vegetation coverage in desert areas, Northwest China | |
| 发表日期 | 2024 |
| ISSN | 0341-8162 |
| EISSN | 1872-6887 |
| 起始页码 | 239 |
| 卷号 | 239 |
| 英文摘要 | Efficient prediction of the response of vegetation to future climate change requires an in depth understanding of the effect of climate change on the land cover by photosynthetic (fPV) and non-photosynthetic vegetation (fNPV) and its driving mechanism. Here, we aimed to estimate fPV and fNPV, and analyze the impacts of climate factors on their seasonal variability in the arid desert of northwestern China. First, optimal vegetation indices (VIs) were selected to estimate fPV and fNPV based on measured spectral reflectance, and the accuracy of estimated fPV and fNPV using Sentinel-2 images was evaluated with data from an unmanned aerial vehicle (UAV). Then, partial correlation, multi-correlation and time-lag effect analyses were used to obtain the correlation coefficients and lag times between fPV, fNPV and climate change. The results showed that Normalized Difference Vegetation Index (NDVI) and Dead Fuel Index (DFI) were the optimal VIs to estimate fPV and fNPV in the desert, with the accuracy of 67 and 52 % for fPV and fNPV, respectively. The average fPV and fNPV were 8.15 and 9.26 % from March to November, their seasonal variability was consistent with plant phenology, and there was a decrease in fPV and fNPV from east to west with a decrease in precipitation. The variability in fPV was driven by precipitation while that of fNPV was dominated by temperature. The time-lag of temperature and precipitation effect on fPV was 1.28 +/- 1.28 and 1.61 +/- 1.16 months, respectively, and on fNPV was 1.28 +/- 1.2 and 1.19 +/- 1.24 months, respectively. The time-lag of temperature-precipitation interaction on fPV and fNPV were 1.4 +/- 1.22 and 1.2 +/- 1.28 months, respectively. Accumulated precipitation had a positive effect on fPV and a negative effect on fNPV, while the impact of accumulated temperature was the opposite. We conclude that there were time-lag and cumulative effects of climate change on fPV and fNPV variability in desert areas. This study helps us better understand the climate-vegetation interactions and provides a scientific basis for desert vegetation management under climate change. |
| 英文关键词 | Non-photosynthetic vegetation; Photosynthetic vegetation; Dead fuel index; Vegetation coverage; Climate-vegetation interactions |
| 语种 | 英语 |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| WOS类目 | Geosciences, Multidisciplinary ; Soil Science ; Water Resources |
| WOS记录号 | WOS:001204137200001 |
| 来源期刊 | CATENA
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/307684 |
| 作者单位 | Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS |
| 推荐引用方式 GB/T 7714 | . Effect of climate change on the seasonal variation in photosynthetic and non-photosynthetic vegetation coverage in desert areas, Northwest China[J],2024,239. |
| APA | (2024).Effect of climate change on the seasonal variation in photosynthetic and non-photosynthetic vegetation coverage in desert areas, Northwest China.CATENA,239. |
| MLA | "Effect of climate change on the seasonal variation in photosynthetic and non-photosynthetic vegetation coverage in desert areas, Northwest China".CATENA 239(2024). |
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