IGSNRR OpenIR
The aridity index governs the variation of vegetation characteristics in alpine grassland, Northern Tibet Plateau
Liu, Biying1,2; Sun, Jian2,3; Liu, Miao2; Zeng, Tao1; Zhu, Juntao2
2019-07-15
Source PublicationPEERJ
ISSN2167-8359
Volume7Pages:17
Corresponding AuthorSun, Jian(sunjian@igsnrr.ac.cn) ; Zeng, Tao(zengtao@cdut.cn)
AbstractThe vegetation dynamic (e.g., community productivity) is an important index used to evaluate the ecosystem function of grassland ecosystem. However, the critical factors that affect vegetation biomass are disputed continuously, and most of the debates focus on mean annual precipitation (MAP) or temperature (MAT). This article integrated these two factors, used the aridity index (AI) to describe the dynamics of MAP and MAT, and tested the hypothesis that vegetation traits are influenced primarily by the AI. We sampled 275 plots at 55 sites (five plots at each site, including alpine steppe and meadow) across an alpine grassland of the northern Tibet Plateau, used correlation analysis and redundancy analysis (RDA) to explore which key factors determine the biomass dynamic, and explained the mechanism by which they affect the vegetation biomass in different vegetation types via structural equation modelling (SEM). The results supported our hypothesis, in all of the environmental factors collected, the AI made the greatest contribution to biomass variations in RDA , and the correlation between the AI and biomass was the largest (R = 0.85, p < 0.05). The final SEM also validated our hypothesis that the AI explained 79.3% and 84.4% of the biomass variations in the alpine steppe and the meadow, respectively. Furthermore, we found that the soils with higher carbon to nitrogen ratio and soil total nitrogen had larger biomass, whereas soil organic carbon had a negative effect on biomass in alpine steppe; however, opposite effects of soil factors on biomass were observed in an alpine meadow. The findings demonstrated that the AI was the most critical factor affecting biomass in the alpine grasslands, and different reaction mechanisms of biomass response to the AI existed in the alpine steppe and alpine meadow.
KeywordAridity index Alpine grassland Aboveground biomass Species richness Coverage Northern Tibet Plateau
DOI10.7717/peerj.7272
WOS KeywordNET PRIMARY PRODUCTION ; ABOVEGROUND BIOMASS ; NITROGEN ADDITION ; SPECIES RICHNESS ; SOIL PROPERTIES ; USE EFFICIENCY ; PRECIPITATION ; CLIMATE ; RESPONSES ; ECOSYSTEMS
Indexed BySCI
Language英语
Funding ProjectNational Science Foundation of China[41871040] ; National Science Foundation of China[41501057]
Funding OrganizationNational Science Foundation of China
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000475470400007
PublisherPEERJ INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/58423
Collection中国科学院地理科学与资源研究所
Corresponding AuthorSun, Jian; Zeng, Tao
Affiliation1.Chengdu Univ Technol, Coll Earth Sci, Chengdu, 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, Peoples R China
3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Liu, Biying,Sun, Jian,Liu, Miao,et al. The aridity index governs the variation of vegetation characteristics in alpine grassland, Northern Tibet Plateau[J]. PEERJ,2019,7:17.
APA Liu, Biying,Sun, Jian,Liu, Miao,Zeng, Tao,&Zhu, Juntao.(2019).The aridity index governs the variation of vegetation characteristics in alpine grassland, Northern Tibet Plateau.PEERJ,7,17.
MLA Liu, Biying,et al."The aridity index governs the variation of vegetation characteristics in alpine grassland, Northern Tibet Plateau".PEERJ 7(2019):17.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Liu, Biying]'s Articles
[Sun, Jian]'s Articles
[Liu, Miao]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liu, Biying]'s Articles
[Sun, Jian]'s Articles
[Liu, Miao]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liu, Biying]'s Articles
[Sun, Jian]'s Articles
[Liu, Miao]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.