气候变化领域集成服务门户(CCPortal): Divergent responses of subtropical evergreen and deciduous forest carbon cycles to the summer 2022 drought

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DOI	10.1088/1748-9326/ad416e
	Divergent responses of subtropical evergreen and deciduous forest carbon cycles to the summer 2022 drought
	Han, Lei; Chen, Yanan; Wang, Ying; Sun, Yuan; Ding, Zhi; Zhang, Hongsheng; Tang, Xuguang
发表日期	2024
ISSN	1748-9326
起始页码	19
结束页码	5
卷号	19 期号:5
英文摘要	Ongoing shifts in climate, especially extreme drought, is posing considerable threats to the forest carbon uptake worldwide. In China, summer 2022 was the warmest and driest since the beginning of meteorological measurements. This study synthesized the tower-based carbon fluxes and climate data from two subtropical evergreen and deciduous forest ecosystems to investigate the effects of such summer drought. Interestingly, the net ecosystem production (NEP = -NEE) only exhibited a slight decrease at the deciduous forest while it even enhanced at the evergreen forest during the summer 2022 drought. Further analysis revealed that although reductions in gross primary productivity (GPP) and ecosystem respiration (R e) were found at both sites, larger decrease in R e than GPP at the evergreen forest led to stronger NEP compared to the previous year. However, the NEP of two forest ecosystems sharply reduced in the following 2023, which can be ascribed to the legacy effects of the summer 2022 drought. The results of multiple linear regression revealed that soil water content (SWC) was recognized as the primary driver of GPP and R e, and downwelling shortwave radiation (R g) regulated the variability of NEP during the summer 2022. Across these forest carbon fluxes including GPP, R e and NEP, the deciduous forest exhibited larger resistance, whereas the evergreen forest showed stronger resilience. All analyses emphasized the diverse adaptive strategies among vegetation types, which acted an important role in assessing ecosystem carbon sequestration in face of future climate change.
英文关键词	forest ecosystem; drought response; carbon cycle; resistance and resilience
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001210795400001
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/299825
作者单位	Southwest University - China; Hangzhou Normal University; Chinese Academy of Sciences; Aerospace Information Research Institute, CAS; University of Hong Kong
推荐引用方式 GB/T 7714	Han, Lei,Chen, Yanan,Wang, Ying,et al. Divergent responses of subtropical evergreen and deciduous forest carbon cycles to the summer 2022 drought[J],2024,19(5).
APA	Han, Lei.,Chen, Yanan.,Wang, Ying.,Sun, Yuan.,Ding, Zhi.,...&Tang, Xuguang.(2024).Divergent responses of subtropical evergreen and deciduous forest carbon cycles to the summer 2022 drought.ENVIRONMENTAL RESEARCH LETTERS,19(5).
MLA	Han, Lei,et al."Divergent responses of subtropical evergreen and deciduous forest carbon cycles to the summer 2022 drought".ENVIRONMENTAL RESEARCH LETTERS 19.5(2024).