气候变化领域集成服务门户(CCPortal): Soil nitrogen pool drives plant tissue traits in alpine treeline ecotones

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DOI	10.1016/j.foreco.2020.118490
	Soil nitrogen pool drives plant tissue traits in alpine treeline ecotones
	Liu J.; Gou X.; Gunina A.; Long X.-E.; Zhang F.; Zhang J.
发表日期	2020
ISSN	0378-1127
卷号	477
英文摘要	Alpine treeline ecotone is one of the most vulnerable ecosystems and considered an ideal “warning line” for the monitoring of global climate change. However, shifts in the nutrient traits of plant biomass and soils of alpine treeline ecotones along the elevation gradient are poorly investigated. This study aimed to quantify nitrogen (N) and phosphorus (P) traits of Qinghai spruce (Picea crassifolia) and their driving factors for seven typical treelines (timberline - treeline - tree species line) covering 800 km southeast-to-northwest transect within the northeastern Tibetan Plateau. The biomass of plant tissue (leaves, twigs, and fine roots) and the N and P contents in them and soil nutrients (total and available N and P) were determined. Two mechanisms, which can drive the nutrient content in plants, namely, temperature-plant physiology and the sink (growth) limitation hypotheses were checked here. The N and P contents in plant tissue increased with the elevation, and temperature negatively impacted tissue N and N:P in all of the seven typical treelines, which supported both of the hypotheses. Soil N availability increased along the altitudinal gradient in 1.23 times. Soil TN explained 13.4% (p < 0.01), NO3–-N 10.1% (p < 0.05), and NH4+-N 8.6% (p < 0.05) of the variations in plant tissue N and P stoichiometry and biomass. Thus, soil N pools stimulated Qinghai spruce growth and have a strong effect on treeline dynamics. © 2020 Elsevier B.V.
英文关键词	Alpine treeline ecotones; N and P stoichiometry; N availability; Nutrient traits; Soil N pool
语种	英语
scopus关键词	Biomass; Climate change; Ecology; Nitrogen; Nutrients; Plants (botany); Soils; Tissue; Driving factors; Elevation gradient; Global climate changes; N availability; Northeastern tibetan plateaux; Nutrient contents; Plant physiology; Vulnerable ecosystems; Forestry; alpine environment; coniferous tree; ecotone; nutrient availability; soil nitrogen; soil nutrient; treeline; Biomass; Ecology; Forestry; Nitrogen; Nutrients; Tissue; China; Qinghai-Xizang Plateau; Picea crassifolia
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154979
作者单位	MOE Key Laboratory of Western China's Environmental Systems, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; Gansu Liancheng Forest Ecosystem Field Observation and Research Station, Lanzhou University, Lanzhou, 730333, China; Department of Environmental Chemistry, University of Kassel, Nordbahnhofstr. 1a, 37213, Witzenhausen, Germany; School of Geographic Sciences, Nantong University, Nantong, 226007, China
推荐引用方式 GB/T 7714	Liu J.,Gou X.,Gunina A.,et al. Soil nitrogen pool drives plant tissue traits in alpine treeline ecotones[J],2020,477.
APA	Liu J.,Gou X.,Gunina A.,Long X.-E.,Zhang F.,&Zhang J..(2020).Soil nitrogen pool drives plant tissue traits in alpine treeline ecotones.Forest Ecology and Management,477.
MLA	Liu J.,et al."Soil nitrogen pool drives plant tissue traits in alpine treeline ecotones".Forest Ecology and Management 477(2020).