气候变化领域集成服务门户(CCPortal): Carbon allocation in Picea jezoensis : Adaptation strategies of a non-treeline species at its upper elevation limit

CCPortal

DOI	10.1016/j.fecs.2024.100188
	Carbon allocation in Picea jezoensis : Adaptation strategies of a non-treeline species at its upper elevation limit
	Dong, Renkai; Li, Na; Li, Mai -He; Cong, Yu; Du, Haibo; Gao, Decai; He, Hong S.
发表日期	2024
ISSN	2095-6355
EISSN	2197-5620
起始页码	11
卷号	11
英文摘要	Understanding the physiological adaptations of non-treeline trees to environmental stress is important to understand future shifts in species composition and distribution of current treeline ecotone. The aim of the present study was to elucidate the mechanisms of the formation of the upper elevation limit of non-treeline tree species, Picea jezoensis , and the carbon allocation strategies of the species on Changbai Mountain. We employed the 13 C in situ pulse labeling technique to trace the distribution of photosynthetically assimilated carbon in Picea jezoensis at different elevational positions (tree species at its upper elevation limit (TSAUE, 1,700 m a.s.l.) under treeline ecotone; tree species at a lower elevation position (TSALE, 1,400 m a.s.l.). We analyzed 13 C and the non -structural carbohydrate (NSC) concentrations in various tissues following labeling. Our findings revealed a signi ficant shift in carbon allocation in TSAUE compared to TSALE. There was a pronounced increase in delta 13 C allocation to belowground components (roots, soil, soil respiration) in TSAUE compared to TSALE. Furthermore, the C flow rate within the plant-soil-atmosphere system was faster, and the C residence time in the plant was shorter in TSAUE. The trends indicate enhanced C sink activity in belowground tissues in TSAUE, with newly assimilated C being preferentially directed there, suggesting a more conservative C allocation strategy by P. jezoensis at higher elevations under harsher environments. Such a strategy, prioritizing C storage in roots, likely aids in withstanding winter cold stress at the expense of aboveground growth during the growing season, leading to reduced growth of TSAUE compared to TSALE. The results of the present study shed light on the adaptive mechanisms governing the upper elevation limits of non-treeline trees, and enhances our understanding of how non-treeline species might respond to ongoing climate change.
英文关键词	13 C pulse labeling; Carbon distribution; Non -structural carbohydrates (NSC); Non-treeline species; Sink activity; Stressful environments; Upper elevation limit
语种	英语
WOS研究方向	Forestry
WOS类目	Forestry
WOS记录号	WOS:001219430100001
来源期刊	FOREST ECOSYSTEMS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304306
作者单位	Northeast Normal University - China; University of Missouri System; University of Missouri Columbia; Swiss Federal Institutes of Technology Domain; Swiss Federal Institute for Forest, Snow & Landscape Research; Chinese Academy of Sciences; Northeast Institute of Geography & Agroecology, CAS; Hebei University
推荐引用方式 GB/T 7714	Dong, Renkai,Li, Na,Li, Mai -He,et al. Carbon allocation in Picea jezoensis : Adaptation strategies of a non-treeline species at its upper elevation limit[J],2024,11.
APA	Dong, Renkai.,Li, Na.,Li, Mai -He.,Cong, Yu.,Du, Haibo.,...&He, Hong S..(2024).Carbon allocation in Picea jezoensis : Adaptation strategies of a non-treeline species at its upper elevation limit.FOREST ECOSYSTEMS,11.
MLA	Dong, Renkai,et al."Carbon allocation in Picea jezoensis : Adaptation strategies of a non-treeline species at its upper elevation limit".FOREST ECOSYSTEMS 11(2024).