Divergent impacts of droughts on vegetation phenology and productivity in the Yungui Plateau, southwest China

doi:10.1016/j.ecolind.2021.107743

	Divergent impacts of droughts on vegetation phenology and productivity in the Yungui Plateau, southwest China
	Ge, Wenyan 1,2; Han, Jianqiao 1,2; Zhang, Daojun 3; Wang, Fei 1,2
刊名	ECOLOGICAL INDICATORS
	2021-08-01
卷号	127 页码:11
关键词	Gross primary productivity Phenology Drought Yungui Plateau
ISSN号	1470-160X
DOI	10.1016/j.ecolind.2021.107743
通讯作者	Wang, Fei(wafe@ms.iswc.ac.cn)
英文摘要	Climate change has led to an increase in the severity and frequency of extreme weather events, especially droughts. Quantifying the impacts of droughts on vegetation activities is essential to study the effects of climate change on the ecosystem. Using Gross Primary Productivity (GPP), phenological metrics, and Standardized precipitation evaporation index (SPEI) with multi-timescales, we evaluated the divergent responses of vegetation activities to droughts in the Yungui Plateau from 2001 to 2017. Besides, the sensitivity of vegetation to drought was analyzed by the maximum correlation coefficients between vegetation activities and SPEI over the plateau. Results revealed that the overall changes of the start (SOS) and end (EOS) of growing season in the plateau exhibited nonsignificant changes during the study period. Meanwhile, two extreme droughts of the study period caused a tremendous decrease in GPP and severe delays in SOS and EOS. Vegetation activities increased significantly in the eastern plateau because of the strong drought resistance of vegetation. Conversely, the dynamics of vegetation activities, especially phenological metrics, were nonsignificant in the west due to the weak drought resistance of vegetation. Preseason droughts of spring phenology played a key role in determining SOS dynamics. Besides, drought before summer contributed to the delay of EOS, while summer drought leads to early EOS. Hence, preseason droughts of autumn phenology nonlinearly impacted EOS due to strong interaction between SOS and EOS. More importantly, the stronger influences of SOS on annual GPP compared to EOS suggest that preseason droughts of SOS are essential to the vegetation productivity in the plateau. Given that the continuous warming of the climate will lead to more frequent droughts, it is essential to investigate the resilience of vegetation growth to drought in future work.
资助项目	Chinese Academy of Sciences[XAB2019B10] ; China Postdoctoral Science Foundation[2020M673499] ; National Natural Science Foundation of China[42007063] ; Northwest Agriculture and Forest University[Z1090219094]
WOS关键词	NET PRIMARY PRODUCTIVITY ; EXTREME WEATHER EVENTS ; LAND-SURFACE PHENOLOGY ; CLIMATE-CHANGE ; TIBETAN PLATEAU ; MONGOLIAN PLATEAU ; USE EFFICIENCY ; VARIABILITY ; PRECIPITATION ; DYNAMICS
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000659188000002
资助机构	Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; Northwest Agriculture and Forest University
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/164050]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang, Fei
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 2.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 3.Northwest A&F Univ, Coll Econ & Management, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Ge, Wenyan,Han, Jianqiao,Zhang, Daojun,et al. Divergent impacts of droughts on vegetation phenology and productivity in the Yungui Plateau, southwest China[J]. ECOLOGICAL INDICATORS,2021,127:11.
APA	Ge, Wenyan,Han, Jianqiao,Zhang, Daojun,&Wang, Fei.(2021).Divergent impacts of droughts on vegetation phenology and productivity in the Yungui Plateau, southwest China.ECOLOGICAL INDICATORS,127,11.
MLA	Ge, Wenyan,et al."Divergent impacts of droughts on vegetation phenology and productivity in the Yungui Plateau, southwest China".ECOLOGICAL INDICATORS 127(2021):11.