干旱区生态环境知识资源中心(Arid): Increasing drought sensitivity of plant photosynthetic phenology and physiology

Arid

DOI	10.1016/j.ecolind.2024.112469
	Increasing drought sensitivity of plant photosynthetic phenology and physiology
	Wang, Yiheng; Tian, Dashuan; Xiao, Jingfeng; Li, Xing; Niu, Shuli
通讯作者	Niu, SL
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2024
卷号	166
英文摘要	Understanding the impacts of drought on plant photosynthetic phenology and physiology is essential for accurately predicting annual gross primary productivity (GPP) and global carbon cycles. While droughts in different seasons can have different effects on plant growth and photosynthesis, a comprehensive understanding of how plant photosynthetic phenology and physiology respond to different seasons' droughts and their temporal changes is lacking. Here, we comprehensively evaluated the drought sensitivities of plant photosynthetic phenology and physiology and their temporal trends in the past two decades, using the start/end of the photosynthetic seasons (SOS/EOS) and peak GPP (GPPmax) derived from FLUXNET ground observations since the 1990s and remote-sensing data (2001-2020) over the globe. Our results show that spring droughts leads to delayed SOS in arid ecosystems and advanced SOS in humid ecosystems. In contrast, droughts in summer and autumn generally advance EOS. In addition, spring droughts decrease GPPmax in arid regions but increase it in humid regions, whereas summer droughts lead to significant GPPmax reductions. More importantly, we observed significant increases in the drought sensitivity of SOS, EOS, and GPPmax over the last two decades, which is driven by long-term decreases in background soil moisture and increases in atmospheric water deficit under climate change. Furthermore, these increasing trends were projected to persist in the 21st century under Shared Socioeconomic Pathways 8.5 and 4.0. Overall, our findings underscore the critical role of drought timing in shaping ecosystem responses and highlight the growing vulnerability of ecosystem phenology and physiology to drought, which may restrict the increases in terrestrial carbon uptake under warming.
英文关键词	Phenology Photosynthetic physiology Drought Remote-sensing Earth system model
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001295834800001
WOS关键词	GROSS PRIMARY PRODUCTIVITY ; CARBON-DIOXIDE ; CLIMATE-CHANGE ; MODELS ; VARIABILITY ; PRECIPITATION ; RESPONSES ; IMPACT
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/2XILL650/403418
推荐引用方式 GB/T 7714	Wang, Yiheng,Tian, Dashuan,Xiao, Jingfeng,et al. Increasing drought sensitivity of plant photosynthetic phenology and physiology[J],2024,166.
APA	Wang, Yiheng,Tian, Dashuan,Xiao, Jingfeng,Li, Xing,&Niu, Shuli.(2024).Increasing drought sensitivity of plant photosynthetic phenology and physiology.ECOLOGICAL INDICATORS,166.
MLA	Wang, Yiheng,et al."Increasing drought sensitivity of plant photosynthetic phenology and physiology".ECOLOGICAL INDICATORS 166(2024).