气候变化领域集成服务门户(CCPortal): Characteristics and drivers of plant C, N, and P stoichiometry in Northern Tibetan Plateau grassland

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DOI	10.3389/fpls.2023.1092872
	Characteristics and drivers of plant C, N, and P stoichiometry in Northern Tibetan Plateau grassland
	Wang, Wei; Zhao, Jiamin; Xing, Zhen; Wang, Xiangtao
发表日期	2023
ISSN	1664-462X
卷号	14
英文摘要	Understanding vegetation C, N, and P stoichiometry helps us not only to evaluate biogeochemical cycles and ecosystem functions but also to predict the potential impact of environmental change on ecosystem processes. The foliar C, N, and P stoichiometry in Northern Tibetan grasslands, especially the controlling factors, has been highlighted in recent years. In this study, we have collected 340 plant samples and 162 soil samples from 54 plots in three grassland types, with the purpose of evaluating the foliar C, N, and P stoichiometry and underlying control factors in three grassland types along a 1,500-km east-to-west transect in the Northern Tibetan Plateau. Our results indicated that the averaged foliar C, N, and P concentrations were 425.9 +/- 15.8, 403.4 +/- 22.2, and 420.7 +/- 30.7 g kg(-1); 21.7 +/- 2.9, 19.0 +/- 2.3, and 21.7 +/- 5.2 g kg(-1); and 1.71 +/- 0.29, 1.19 +/- 0.16, and 1.59 +/- 0.6 g kg(-1) in the alpine meadow (AM), alpine steppe (AS), and desert steppe (DS) ecosystems, respectively. The foliar C and N ratios were comparable, with values of 19.8 +/- 2.8, 20.6 +/- 1.9, and 19.9 +/- 5.8 in the AM, AS, and DS ecosystems, respectively. Both the C/P and N/P ratios are the lowest in the AM ecosystem, with values of 252.2 +/- 32.6 and 12.8 +/- 1.3, respectively, whereas the highest values of 347.3 +/- 57.0 and 16.2 +/- 3.2 were obtained in the AS ecosystem. In contrast, the soil C, N, C/P, and N/P values decreased from the AM to DS ecosystem. Across the whole transects, leaf C, N, and P stoichiometry showed no obvious trend, but soil C and N concentrations showed an increasing trend, and soil P concentrations showed a decreasing trend with the increasing longitude. Based on the general linear model analysis, the vegetation type was the dominant factor controlling the leaf C, N, and P stoichiometry, accounting for 42.8% for leaf C, 45.1% for leaf N, 35.2% for leaf P, 52.9% for leaf C/N, 39.6% for leaf C/P, and 48.0% for leaf N/P; the soil nutrients and climate have relatively low importance. In conclusion, our results supported that vegetation type, rather than climatic variation and soil nutrients, are the major determinants of north Tibet grassland leaf stoichiometry.
关键词	C N and P stoichiometry plant and soil grassland type influence factors North Tibetan Plateau
英文关键词	PHOSPHORUS STOICHIOMETRY; LEAF NITROGEN; ALTITUDINAL GRADIENTS; CNP STOICHIOMETRY; N/P RATIO; PATTERNS; TERRESTRIAL; SOIL; COMMUNITIES; CARBON
WOS研究方向	Plant Sciences
WOS记录号	WOS:000982796500001
来源期刊	FRONTIERS IN PLANT SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283428
作者单位	Tibet Agriculture & Animal Husbandry University; Tibet Agriculture & Animal Husbandry University; Tibet Agriculture & Animal Husbandry University
推荐引用方式 GB/T 7714	Wang, Wei,Zhao, Jiamin,Xing, Zhen,et al. Characteristics and drivers of plant C, N, and P stoichiometry in Northern Tibetan Plateau grassland[J],2023,14.
APA	Wang, Wei,Zhao, Jiamin,Xing, Zhen,&Wang, Xiangtao.(2023).Characteristics and drivers of plant C, N, and P stoichiometry in Northern Tibetan Plateau grassland.FRONTIERS IN PLANT SCIENCE,14.
MLA	Wang, Wei,et al."Characteristics and drivers of plant C, N, and P stoichiometry in Northern Tibetan Plateau grassland".FRONTIERS IN PLANT SCIENCE 14(2023).