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Community-level trait responses and intra-specific trait variability play important roles in driving community productivity in an alpine meadow on the Tibetan Plateau
Li, Wei1; Zhao, Jie1; Epstein, Howard E.1; Jing, Guanghua1; Cheng, Jimin1; Du, Guozhen1; Li, W (reprint author), Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
SubtypeArticle
2017
Source PublicationJOURNAL OF PLANT ECOLOGY
ISSN1752-9921
description.correspondentemailliwei2013@nwsuaf.edu.cn
Volume10Issue:4Pages:592-600
AbstractAims Human activities have dramatically increased nutrient inputs to ecosystems, impacting plant community diversity, composition and functioning. Extensive research has shown that a decrease in species diversity and an increase in productivity are a common phenomenon following fertilization in grasslands ecosystem. The magnitude of the response of species diversity and above-ground net primary productivity (ANPP) to fertilization mainly depends on species traits (mean trait values) and traits variability (plasticity). Our aim of this study was to examine (i) changes of species diversity (species richness and Shannon-Wiener index) and ANPP following fertilization; (ii) which species traits or community-weighted mean (CWM) traits can determine ANPP, as expected from the 'biomass ratio hypothesis'; and (iii) the relative role of intra-specific and inter-specific trait variability in this process following fertilization. Methods We measured ANPP and four key plant functional traits: specific leaf area (SLA), leaf dry matter content (LDMC), mature plant height (MPH) and leaf nitrogen concentration (LNC) for 25 component species along a fertilization gradient in an alpine meadow on the Tibetan Plateau. In addition, trait variation of species was assessed using coefficients of variation (CV), and we calculated the ratio of the CVintra to the CVinter. Important Findings Our results showed that: (i) fertilization significantly reduced species richness and Shannon-Weiner diversity index, but significantly increased ANPP; (ii) there was a significant positive correlation between ANPP and CWM-SLA and CWM-MPH, yet there was no significant relationship between ANPP and CWM-LNC or CWM-LDMC; (iii) intra-specific variability in SLA and MPH was found to be much greater than inter-specific variability, especially at the higher fertilization levels. We concluded that CWM-SLA and CWM-MPH can be used to assess the impacts of species changes on ecosystem functioning, and dominant species can maximize resource use through intra-specific variability in SLA and MPH to compensate for the loss of species following fertilization, therefore maintaining high community productivity.
KeywordBiomass Ratio Hypothesis Fertilization Leaf Dry Matter Content Leaf Nitrogen Concentration Mature Plant Height Specific Leaf Area Tibetan Plateau
Subject AreaPlant Sciences ; Environmental Sciences & Ecology
DOI10.1093/jpe/rtw069
Indexed BySCI
Publication PlaceOXFORD
Language英语
WOS IDWOS:000417976800002
PublisherOXFORD UNIV PRESS
Funding OrganizationNatural Science Foundation of China [41230852]; Chinese Academy of Sciences [KJZD-EW-TZ-G10]; Northwest A F University [Z109021107, Z109021307, QN2013070]; West Light Foundation of Chinese Academy of Sciences [K318021305]; Natural Science Foundation of Shaanxi Province [2016JQ3008]; China Scholarship Council ; Natural Science Foundation of China [41230852]; Chinese Academy of Sciences [KJZD-EW-TZ-G10]; Northwest A F University [Z109021107, Z109021307, QN2013070]; West Light Foundation of Chinese Academy of Sciences [K318021305]; Natural Science Foundation of Shaanxi Province [2016JQ3008]; China Scholarship Council
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Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/7945
Collection水保所科研产出--SCI_2017--SCI
Corresponding AuthorLi, W (reprint author), Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
Affiliation1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, 26 Xinong Rd, Yangling 712100, Peoples R China
2.Chinese Acad Sci, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Peoples R China
3.Minist Water Resource, 26 Xinong Rd, Yangling 712100, Peoples R China
4.Northwest A&F Univ, Coll Anim Sci & Technol, 22 Xinong Rd, Yangling 712100, Peoples R China
5.Univ Virginia, Dept Environm Sci, 291 McCormick Rd, Charlottesville, VA 22904 USA
6.Lanzhou Univ, Sch Life Sci, 222 Tianshui Rd, Lanzhou 730000, Gansu, Peoples R China
Recommended Citation
GB/T 7714
Li, Wei,Zhao, Jie,Epstein, Howard E.,et al. Community-level trait responses and intra-specific trait variability play important roles in driving community productivity in an alpine meadow on the Tibetan Plateau[J]. JOURNAL OF PLANT ECOLOGY,2017,10(4):592-600.
APA Li, Wei.,Zhao, Jie.,Epstein, Howard E..,Jing, Guanghua.,Cheng, Jimin.,...&Li, W .(2017).Community-level trait responses and intra-specific trait variability play important roles in driving community productivity in an alpine meadow on the Tibetan Plateau.JOURNAL OF PLANT ECOLOGY,10(4),592-600.
MLA Li, Wei,et al."Community-level trait responses and intra-specific trait variability play important roles in driving community productivity in an alpine meadow on the Tibetan Plateau".JOURNAL OF PLANT ECOLOGY 10.4(2017):592-600.
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