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Plant nitrogen concentration is more sensitive in response to degradation than phosphorus concentration in alpine meadow
Zhou, Tiancai1,2; Zong, Ning1,2; Sun, Jian3; Hou, Ge1,2; Shi, Peili1,2
2021-11-01
Source PublicationECOLOGICAL ENGINEERING
ISSN0925-8574
Volume169Pages:9
Corresponding AuthorShi, Peili(shipl@igsnrr.ac.cn)
AbstractExploring the early warning signals of plant and soil characteristics in response to degradation is of great theoretical significance to illuminate the underlying driving mechanism of alpine meadow degradation. Here, in alpine meadow of Damxung County on the Tibetan Plateau, a field survey along degradation gradients was conducted to measure plant and soil properties: from non-degradation to severely degradation, simultaneous impairments in plant total biomass, plant coverage, plant N concentration, soil moisture, soil total C and N were detected, which significantly (P<0.05) decreased by 85.36%, 54.30%, 25.23%, 26.95%, 28.94% and 12.85% in sequence, while no significant change in plant P concentration was observed. As grassland degradation increased, a consistent decrease of plant N: P ratios (<14) not only demonstrated that N was a strong limiting factor for plants growth, but also supported our hypothesis that plant N concentration was more sensitive in response to degradation than plant P concentration. Path analyses further indicated that soil moisture and soil total nitrogen were the most critical factors that mediated the plant N: P in response to degradation. Although our findings suggested that N resorption efficiency was improved after grassland degradation, the increase in grassland degradation would enhance the N concentration decoupling from P concentration, which in turn might further exacerbate the N limitation and the degradation in alpine ecosystems. The early-warning signals of grassland degradation obtained here not only can improve the understanding of grassland degradation, but also can provide guidance for the restoration and management of degraded alpine meadow on the Tibetan Plateau.
KeywordAlpine meadow Grassland degradation Plant nutrients concentrations Tibetan Plateau
DOI10.1016/j.ecoleng.2021.106323
WOS KeywordN-P RATIOS ; GRASSLAND DEGRADATION ; TERRESTRIAL PLANTS ; INORGANIC NITROGEN ; DEGRADED GRADIENTS ; SOIL NUTRIENTS ; STOICHIOMETRY ; RESORPTION ; VEGETATION ; COMMUNITY
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[31870406] ; National Natural Science Foundation of China[42071066] ; National Key Research and Development Program[2017YFA0604802]
Funding OrganizationNational Natural Science Foundation of China ; National Key Research and Development Program
WOS Research AreaEnvironmental Sciences & Ecology ; Engineering
WOS SubjectEcology ; Engineering, Environmental ; Environmental Sciences
WOS IDWOS:000674452700008
PublisherELSEVIER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/163714
Collection中国科学院地理科学与资源研究所
Corresponding AuthorShi, Peili
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Inst Tibetan Plateau Res, State Key Lab Tibetan Plateau Earth Syst Sci LAT, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Zhou, Tiancai,Zong, Ning,Sun, Jian,et al. Plant nitrogen concentration is more sensitive in response to degradation than phosphorus concentration in alpine meadow[J]. ECOLOGICAL ENGINEERING,2021,169:9.
APA Zhou, Tiancai,Zong, Ning,Sun, Jian,Hou, Ge,&Shi, Peili.(2021).Plant nitrogen concentration is more sensitive in response to degradation than phosphorus concentration in alpine meadow.ECOLOGICAL ENGINEERING,169,9.
MLA Zhou, Tiancai,et al."Plant nitrogen concentration is more sensitive in response to degradation than phosphorus concentration in alpine meadow".ECOLOGICAL ENGINEERING 169(2021):9.
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