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Limited inorganic N niche partitioning by nine alpine plant species after long-term nitrogen addition
Zhang, Li1; Zhu, Tongbin2; Liu, Xiang1; Nie, Ming1; Xu, Xingliang3; Zhou, Shurong1,4
2020-05-20
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume718Pages:9
Corresponding AuthorZhou, Shurong(zhshrong@fudan.edu.cn)
Abstract1. Nitrogen (N) is a major nutrient limiting plant growth in most terrestrial ecosystems. Both niche partitioning and fitness equalizing mechanisms related to N acquisition have been proposed to explain the maintenance of biodiversity and ecosystem functioning. However, their relative importance remains controversial and unclear, especially in worldwide terrestrial ecosystems increasingly threatened by N deposition. 2. We added NH4NO3 at four levels over 7 years in an alpine meadow on Qinghai-Tibetan Plateau to simulate the effects of N deposition. Nine species that all occurred along an N addition gradient were selected for in-situ N-15 labeling experiment to quantify their uptake of ammonium verse nitrate. 3. Plants absorbed more ammonium and nitrate with increased N addition. We found limited inorganic N niche partitioning along the N addition gradient. Instead, species tended to prefer the most abundant form of inorganic N in soil, i.e. ammonium. Of all possible linear mixed effects models constructed to explain variation in either ammonium or nitrate uptake, the most parsimonious one included soil available N. That means plant' N uptake is influenced by habitat qualities, instead of the amount of added N itself. 4. Our findings suggest that inorganic N niche partitioning may play limited role in the maintenance of high diversity in this alpine meadow. Instead, species coexistence might be promoted by minimizing their fitness differences through preferring the most abundant form of inorganic N in the soil. This provides important insights into species coexistence under future N addition in Tibetan alpine meadows. (C) 2020 Elsevier B.V. All rights reserved.
KeywordChemical N partitioning Competitive exclusion Habitat filtering N uptake strategy NH4NO3 addition Tibetan alpine meadow
DOI10.1016/j.scitotenv.2020.137270
WOS KeywordORGANIC NITROGEN ; SOIL-NITROGEN ; ACQUISITION ; PLASTICITY ; COMPETITION ; MECHANISMS ; LIMITATION ; DIVERSITY ; MICROORGANISMS ; PRODUCTIVITY
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[31830009] ; National Natural Science Foundation of China[31770518] ; National Natural Science Foundation of China[41877089]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000526029000080
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/133850
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZhou, Shurong
Affiliation1.Fudan Univ, Sch Life Sci, SIEC, Minist Educ Key Lab Biodivers Sci & Ecol Engn,Coa, 2005 Songhu Rd, Shanghai 200438, Peoples R China
2.Chinese Acad Geol Sci, MLR & Guangxi, Karst Dynam Lab, Inst Karst Geol, Guilin 541004, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources, Key Lab Ecosyst Network Observat & Modeling, 11A Datun Rd, Beijing 100101, Peoples R China
4.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Li,Zhu, Tongbin,Liu, Xiang,et al. Limited inorganic N niche partitioning by nine alpine plant species after long-term nitrogen addition[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,718:9.
APA Zhang, Li,Zhu, Tongbin,Liu, Xiang,Nie, Ming,Xu, Xingliang,&Zhou, Shurong.(2020).Limited inorganic N niche partitioning by nine alpine plant species after long-term nitrogen addition.SCIENCE OF THE TOTAL ENVIRONMENT,718,9.
MLA Zhang, Li,et al."Limited inorganic N niche partitioning by nine alpine plant species after long-term nitrogen addition".SCIENCE OF THE TOTAL ENVIRONMENT 718(2020):9.
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