气候变化领域集成服务门户(CCPortal): Decline in tree-ring growth of Picea mongolica and its intra-annual eco-physiological responses to drought and CO2 enrichment in semi-arid China

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DOI	10.1007/s11676-024-01716-8
	Decline in tree-ring growth of Picea mongolica and its intra-annual eco-physiological responses to drought and CO2 enrichment in semi-arid China
	Zeng, Xiaomin; Ni, Ping; Liu, Xiaohong; Wang, Wenzhi; Li, Yao; Wang, Wenchao
发表日期	2024
ISSN	1007-662X
EISSN	1993-0607
起始页码	35
结束页码	1
卷号	35 期号:1
英文摘要	Episodes of drought-induced decline in tree growth and mortality are becoming more frequent as a result of climate warming and enhanced water stress in semi-arid areas. However, the ecophysiological mechanisms underlying the impact of drought on tree growth remains unresolved. In this study, earlywood and latewood tree-ring growth, delta C-13, and delta O-18 chronologies of Picea mongolica from 1900 to 2013 were developed to clarify the intra- and inter-annual tree-ring growth responses to increasingly frequent droughts. The results indicate that annual basal area increment residuals (BAI(res)), which removed tree age and size effects, have significantly decreased since 1960. However, the decreasing trend of earlywood BAI(res) was higher than that of latewood. Climate response analysis suggests that the dominant parameters for earlywood and latewood proxies (BAI(res), delta C-13 and delta O-18) were drought-related climate variables (Palmer drought severity index, temperature, relative humidity, and vapor pressure deficit). The most significant period of earlywood and latewood proxies' responses to climate variables were focused on June-July and July-August, respectively. BAI(res), and delta C-13 were significantly affected by temperature and moisture conditions, whereas delta O-18 was slightly affected. Decreasing stomatal conductance due to drought outweighed the influence of increasing CO2 on intrinsic water use efficiency (iWUE), and ultimately led to a decline in BAI(res). Compared to latewood, the faster decreasing BAI(res) and smaller increasing iWUE of earlywood suggested trees were more vulnerable to water stress in the early growing season. Our study provides insights into the inter- and intra-annual mechanisms of tree-ring growth in semi-arid regions under rising CO2 and climate change.
英文关键词	Tree growth; Drought; Water-use efficiency; Seasonal differences; Stable isotopes
语种	英语
WOS研究方向	Forestry
WOS类目	Forestry
WOS记录号	WOS:001197259300002
来源期刊	JOURNAL OF FORESTRY RESEARCH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/290464
作者单位	Shaanxi Normal University; Chinese Academy of Sciences; Institute of Mountain Hazards & Environment, CAS; Chinese Academy of Sciences; Shenyang Institute of Applied Ecology, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Zeng, Xiaomin,Ni, Ping,Liu, Xiaohong,et al. Decline in tree-ring growth of Picea mongolica and its intra-annual eco-physiological responses to drought and CO2 enrichment in semi-arid China[J],2024,35(1).
APA	Zeng, Xiaomin,Ni, Ping,Liu, Xiaohong,Wang, Wenzhi,Li, Yao,&Wang, Wenchao.(2024).Decline in tree-ring growth of Picea mongolica and its intra-annual eco-physiological responses to drought and CO2 enrichment in semi-arid China.JOURNAL OF FORESTRY RESEARCH,35(1).
MLA	Zeng, Xiaomin,et al."Decline in tree-ring growth of Picea mongolica and its intra-annual eco-physiological responses to drought and CO2 enrichment in semi-arid China".JOURNAL OF FORESTRY RESEARCH 35.1(2024).