干旱区生态环境知识资源中心(Arid): Significant influences of extreme climate on autumn phenology in Central Asia grassland

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DOI	10.1016/j.ecolind.2023.111056
	Significant influences of extreme climate on autumn phenology in Central Asia grassland
	Gao, Xinyue; Tao, Zexing; Dai, Junhu
通讯作者	Tao, ZX
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2023
卷号	155
英文摘要	Over the past half-century, there has been a significant rise in the frequency and intensity of extreme climate events in dryland ecosystems. While vegetation phenology acts as an important indicator of how ecosystems respond to climate change, the impact of extreme climate events on autumn phenology in dryland ecosystems remains uncertain. In this study, we firstly assessed the temporal variations in the end of growing season (EOS) in Central Asia using the Normalized Difference Vegetation Index and enhanced vegetation index over 2001-2018. Then, we assessed the impacts of eight climate indices, which capture the average and extreme conditions of the local climate, on EOS across diverse vegetation types using linear mixed models. Finally, we conducted partial correlation analysis to explore how the primary influencing factors affect EOS along an elevational gradient. Our results suggested increased occurrences of drought and heat events in the pre-growing season (April-September) in Central Asia. Under the background, a general trend towards earlier EOS (ca. 1.01 days/decade) was observed for grassland. This trend was mostly attributed to the changes in extreme climate indices (CIextreme), especially heavy rainfall and heat stress. The total explanatory power of CIextreme was almost twice that of mean climate indices (CImean). However, the impact of CIextreme was less pronounced in regions with elevations exceeding 1500 m. For forests and shrublands, the EOS exhibited delaying trend of 1.29 days/decade and advancing trend of 1.21 days/decade, respectively. Contrary to grasslands, the variations in EOS of forests and shrublands were largely influenced by the shift of CImean, especially mean minimum temperature and accumulated precipitation. The contribution of CIextreme accounted for only 1/6 of the contribution of CImean, likely attributed to the adaptation of forests to cold conditions and shrublands to arid conditions. The results provide valuable insights into the phenological response to extreme climate events and serve as a reference for ecosystem management in arid regions.
英文关键词	Autumn phenology Extreme climate Climate change Central Asia
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001091734400001
WOS关键词	LAND-SURFACE PHENOLOGY ; LEAF SENESCENCE ; NORTHERN-HEMISPHERE ; VEGETATION PHENOLOGY ; FOREST PHENOLOGY ; PROTEIN-CONTENT ; TEMPERATURE ; RESPONSES ; IMPACTS ; SEASON
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395965
推荐引用方式 GB/T 7714	Gao, Xinyue,Tao, Zexing,Dai, Junhu. Significant influences of extreme climate on autumn phenology in Central Asia grassland[J],2023,155.
APA	Gao, Xinyue,Tao, Zexing,&Dai, Junhu.(2023).Significant influences of extreme climate on autumn phenology in Central Asia grassland.ECOLOGICAL INDICATORS,155.
MLA	Gao, Xinyue,et al."Significant influences of extreme climate on autumn phenology in Central Asia grassland".ECOLOGICAL INDICATORS 155(2023).