气候变化领域集成服务门户(CCPortal): Sensitivity of Grassland Coverage to Climate across Environmental Gradients on the Qinghai-Tibet Plateau

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DOI	10.3390/rs15123187
	Sensitivity of Grassland Coverage to Climate across Environmental Gradients on the Qinghai-Tibet Plateau
	Wu, Rihan; Hu, Guozheng; Ganjurjav, Hasbagan; Gao, Qingzhu
发表日期	2023
EISSN	2072-4292
卷号	15 期号:12
英文摘要	Grassland cover is strongly influenced by climate change. The response of grassland cover to climate change becomes complex with background climate. There have been some advances in research on the sensitivity of grassland vegetation to climate change around the world, but the differences in climate sensitivity among grassland types are still unclear in alpine grassland. Therefore, we applied MODIS NDVI data and trend analysis methods to quantify the spatial and temporal variation of grassland vegetation cover on the Qinghai-Tibet Plateau. Then, we used multiple regression models to analyze the sensitivity of fractional vegetation cover (FVC) to climatic factors (Temperature, Precipitation, Solar radiation, Palmer drought severity index) and summarized the potential mechanisms of vegetation sensitivity to different climatic gradients. Our results showed (1) a significant increasing trend in alpine desert FVC from 2000-2018 (1.12 x 10(-3)/a, R-2 = 0.56, p < 0.001) but no significant trend in other grassland types. (2) FVC sensitivity to climatic factors varied among grassland types, especially in the alpine desert, which had over 60% of the area with positive sensitivity to temperature, precipitation and PDSI. (3) The sensitivity of grassland FVC to heat factors decreases with rising ambient temperature while the sensitivity to moisture increases. Similarly, the sensitivity to moisture decreases while the sensitivity to thermal factors increases along the moisture gradient. Furthermore, the results suggest that future climate warming will promote grassland in cold and wet areas of the Qinghai-Tibet Plateau and may suppress vegetation in warmer areas. In contrast, the response of the alpine desert to future climate is more stable. Studying the impact of climate variation at a regional scale could enhance the adaptability of vegetation in future global climates.
关键词	climate change fractional vegetation cover sensitivity climatic space Qinghai-Tibet Plateau
英文关键词	VEGETATION DISTRIBUTION; ALPINE ECOSYSTEM; MANN-KENDALL; IMPACTS; PRECIPITATION; PLANT; TEMPERATURE; VARIABILITY; PHENOLOGY
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:001018441500001
来源期刊	REMOTE SENSING
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282685
作者单位	Chinese Academy of Agricultural Sciences; Institute of Environment & Sustainable Development in Agriculture, CAAS
推荐引用方式 GB/T 7714	Wu, Rihan,Hu, Guozheng,Ganjurjav, Hasbagan,et al. Sensitivity of Grassland Coverage to Climate across Environmental Gradients on the Qinghai-Tibet Plateau[J],2023,15(12).
APA	Wu, Rihan,Hu, Guozheng,Ganjurjav, Hasbagan,&Gao, Qingzhu.(2023).Sensitivity of Grassland Coverage to Climate across Environmental Gradients on the Qinghai-Tibet Plateau.REMOTE SENSING,15(12).
MLA	Wu, Rihan,et al."Sensitivity of Grassland Coverage to Climate across Environmental Gradients on the Qinghai-Tibet Plateau".REMOTE SENSING 15.12(2023).