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Plant organic N uptake maintains species dominance under long-term warming
Jiang, LL (Jiang, Lili)1; Wang, SP (Wang, Shiping)1,2; Zhe, P (Zhe, Pang)3; Xu, XL (Xu, Xingliang)4; Kardol, P (Kardol, Paul)5; Li, YM (Li, Yaoming)1; Zhang, LR (Zhang, Lirong)1; Wang, YF (Wang, Yanfen)3; Lei, Z (Lei, Zhong)6; Lan, ZC (Lan, Zhichun)7; Hill, PW (Hill, Paul W.)8; Zhang, ZH (Zhang, Zhenhua)9; Luo, CY (Luo, Caiyun)9; Rui, YC (Rui, Yichao)10,11; Ning, D (Ning, Dong)12,13; Jones, DL (Jones, Davey L.)8
Source PublicationPLANT AND SOIL

Background and aimsThere is ample experimental evidence for shifts in plant community composition under climate warming. To date, however, the underlying mechanisms driving these compositional shifts remain poorly understood.

Methods The amount and form of nitrogen (N) available to plants are among the primary factors limiting productivity and plant coexistence in terrestrial ecosystems. We conducted a short-term N-15 tracer experiment in a ten-year warming and grazing experiment in an alpine grassland to investigate the effects of warming and grazing on plant uptake of NO3--N, NH4+-N, and glycine-N. Four dominant plant species (Kobresia humilis, Potentilla anseria, Elymus nutans, Poa annua) were selected.

Results We found that 10-years of warming decreased plant uptake of inorganic N by up to 80% in all species. In contrast, warming increased the uptake of organic N in K. humilis, P. anseria, and E. nutans but not in P. annua. Results showed that plant relative biomass increased hyperbolically with the ratio of the plant species total uptake of available N and plant community uptake of available N. And a significant positive correlation between plant species uptake of soil glycine-N and the uptake of total available N.

Conclusions The stable relative biomass of plant species is largely dependent on organic N uptake by plants. We conclude that plant organic N uptake maintains species dominance under long-term warming.

Subject Area生态学
WOS IDWOS:000449754900018
Indexed BySCIE
KeywordAlpine Meadow Ecosystem Relative Uptake Rates Recent Climate-change Tibetan Plateau Ecological Responses Nitrogen Limitation Soil-nitrogen Amino-acids Grassland Ammonium
WOS Research AreaAgriculture ; Plant Sciences
WOS SubjectAgronomy ; Plant Sciences ; Soil Science
Cooperation Status国际
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Document Type期刊论文
Corresponding AuthorJiang, LL (Jiang, Lili); Wang, YF (Wang, Yanfen)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol, Beijing 100101, Peoples R China;
2.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;
3.Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China;
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Beijing 100101, Peoples R China;
5.Swedish Univ Agr Sci, Dept Forest Ecol & Management, S-90183 Umea, Sweden;
6.Univ China Australia Ctr Sustainable Urban Dev, Sch Environm Sci & Engn, Tianjin, Peoples R China;
7.Nanchang Univ, Inst Life Sci, Ctr Watershed Ecol, Nanchang 330031, Jiangxi, Peoples R China;
8.Bangor Univ, Sch Environm Nat Resources & Geog, Bangor LL57 2UW, Gwynedd, Wales;
9.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining, Qinghai, Peoples R China;
10.Univ Western Australia, Fac Law, Sch Earth & Environm, AUS, Perth, WA, Australia;
11.Univ Western Australia, Fac Law, Inst Agr Crawley, AUS, Perth, WA, Australia;
12.Univ Reading, Ctr Past Climate Change, Geog & Environm Sci SAGES, Reading, Berks, England;
13.Univ Reading, Sch Archaeol, Reading, Berks, England.
Recommended Citation
GB/T 7714
Jiang, LL ,Wang, SP ,Zhe, P ,et al. Plant organic N uptake maintains species dominance under long-term warming[J]. PLANT AND SOIL,2018,433(0):243-255.
APA Jiang, LL .,Wang, SP .,Zhe, P .,Xu, XL .,Kardol, P .,...&Jones, DL .(2018).Plant organic N uptake maintains species dominance under long-term warming.PLANT AND SOIL,433(0),243-255.
MLA Jiang, LL ,et al."Plant organic N uptake maintains species dominance under long-term warming".PLANT AND SOIL 433.0(2018):243-255.
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