Coupling between plant nitrogen and phosphorus along water and heat gradients in alpine grassland

doi:10.1016/j.scitotenv.2019.134660

	Coupling between plant nitrogen and phosphorus along water and heat gradients in alpine grassland
	Zhou, Tian-Cai 2,3,4; Sun, Jian 2,3; Liu, Miao 2,5; Shi, Pei-Li 2,3; Zhang, Xu-Bo 2; Sun, Wei 2; Yang, Gang 1; Tsunekawa, Atsushi 5
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2020-01-20
卷号	701 页码:9
关键词	Alpine grasslands Aridity index Nutrient availability Ecological stoichiometry Tibetan Plateau
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2019.134660
通讯作者	Sun, Jian(sunjian@igsnrr.ac.cn) ; Liu, Miao(liumiao@igsnrr.ac.cn)
英文摘要	The biogeochemical cycles of plant nitrogen (N) and phosphorus (P) are interlinked by ecological processes, and the N and P cycles become uncoupled in response to global change experiments. However, the complex natural hydrothermal conditions in arid, semiarid and humid grassland ecosystems may have different effects on the availability of soil nutrients and moisture and may induce different balances between the N and P cycles. Here, we evaluated how the aridity index (AI) affects the balance between N and P of alpine grassland by the collected 115 sites along water and heat availability gradients on the Tibetan Plateau. We found that AI was negatively related to the variation in the coefficients of soil total dissolved N (TDN) and soil availability of P (SAP), and positive effects of AI, TDN and SAP on the coupling of plant N and P were detected. Thus, AI was positively correlated with soil nutrients and moisture, which may favor the co-uptake of soil nutrients by plants, resulting in a small variation in plant N and P in humid environments. Conversely, in arid environments with temporally variable soil nutrients, the plants tend to be more flexible in their N:P stoichiometry. Generally, our findings suggest that plant N and P could be more strongly coupled in humid conditions than in arid environments across alpine grasslands, with potential decoupling of the N biogeochemical cycle from P in an arid environment with an asynchronous dynamic of temperature and precipitation. (C) 2019 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[41871040] ; National Natural Science Foundation of China[31870406] ; State Key Research Development Program of China[2016YFC0501802] ; State Key Research Development Program of China[2016YFC0502002] ; Science and Technology Service Network Initiative[KFJ-STS-ZDTP-036]
WOS关键词	CARBON ; ECOSYSTEMS ; STOICHIOMETRY ; TEMPERATURE ; NUTRIENTS ; IMBALANCE ; BIOMASS
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000498801400018
资助机构	National Natural Science Foundation of China ; State Key Research Development Program of China ; Science and Technology Service Network Initiative
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/130368]
专题	中国科学院地理科学与资源研究所
通讯作者	Sun, Jian; Liu, Miao
作者单位	1.Southwest Univ Sci & Technol, Sch Life Sci & Engn, Mianyang 621010, Sichuan, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Synth Res Ctr Chinese Ecosyst Res Network, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosystem Network Observat & Modeling, Lhasa Plateau Ecosystem Res Stn, Beijing 100101, Peoples R China 5.Tottori Univ, Arid Land Res Ctr, Tottori 6800001, Japan
推荐引用方式 GB/T 7714	Zhou, Tian-Cai,Sun, Jian,Liu, Miao,et al. Coupling between plant nitrogen and phosphorus along water and heat gradients in alpine grassland[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,701:9.
APA	Zhou, Tian-Cai.,Sun, Jian.,Liu, Miao.,Shi, Pei-Li.,Zhang, Xu-Bo.,...&Tsunekawa, Atsushi.(2020).Coupling between plant nitrogen and phosphorus along water and heat gradients in alpine grassland.SCIENCE OF THE TOTAL ENVIRONMENT,701,9.
MLA	Zhou, Tian-Cai,et al."Coupling between plant nitrogen and phosphorus along water and heat gradients in alpine grassland".SCIENCE OF THE TOTAL ENVIRONMENT 701(2020):9.