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Leaf meristems: an easily ignored component of the response to human disturbance in alpine grasslands
Hong, Jiangtao1,2; Ma, Xingxing1,2; Wang, Xiaodan1
Corresponding AuthorWang, Xiaodan
AbstractGrazing and fencing are two important factors that influence productivity and biomass allocation in alpine grasslands. The relationship between root (R) and shoot (S) biomass and the root: shoot ratio (R/S) are critical parameters for estimating the terrestrial carbon stocks and biomass allocation mechanism responses to human activities. Previous studies have often used the belowground: aboveground biomass ratio (M-b/M-a) to replace the R/S in alpine ecosystems. However, these studies may have neglected the leaf meristem biomass, which belongs to the shoot but occurs below the soil surface, leading to a significant overestimation of the R/S ratio. We conducted a comparative study to explore the differences between the R/S and M-b/M-a at both the species (Stipa purpurea, Carex moorcroftii, and Artemisia nanschanica) and community levels on a Tibetan alpine grassland with grazing and fencing management blocks. The results revealed that the use of the M-b/M-a to express the R/S appeared to overestimate the actual value of the R/S, both at species and community levels. For S. purpurea, the M-b/M-a was three times higher than the R/S. The M-b/M-a was approximately two times higher than the R/S for the species of C. moorcroftii and A. nanschanica and at the community level. The relationships between the R-S and M-b-M-a exhibited different slopes for the alpine plants across all the management practices. Compared to the fenced grasslands, the plants in the grazing blocks not only allocated more biomass to the roots but also to the leaf meristems. The present study highlights the contribution of leaf meristems to the accurate assessment of shoot and belowground biomasses. The R/S and M-b/M-a should be cautiously used in combination in the future research. The understanding of the distinction between the R-S and M-b-M-a may help to improve the biomass allocation mechanism response to human disturbances in an alpine area.
KeywordAlpine Plant Biomass Allocation Fencing Grazing Leaf Meristems Tibetan Plateau
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS SubjectEcology
WOS IDWOS:000374568300007
Funding OrganizationStrategic Leading Science and Technology Projects CAS(XDB03030505) ; National Science and Technology support project(2011BAC09B03) ; Action-plan of the Chinese Academy of Sciences (CAS)(KZCX2-XB3-08)
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, 9,Block 4,Renminnanlu Rd, Chengdu 610041, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
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GB/T 7714
Hong, Jiangtao,Ma, Xingxing,Wang, Xiaodan. Leaf meristems: an easily ignored component of the response to human disturbance in alpine grasslands[J]. ECOLOGY AND EVOLUTION,2016,6(8):2325-2332.
APA Hong, Jiangtao,Ma, Xingxing,&Wang, Xiaodan.(2016).Leaf meristems: an easily ignored component of the response to human disturbance in alpine grasslands.ECOLOGY AND EVOLUTION,6(8),2325-2332.
MLA Hong, Jiangtao,et al."Leaf meristems: an easily ignored component of the response to human disturbance in alpine grasslands".ECOLOGY AND EVOLUTION 6.8(2016):2325-2332.
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