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Verification of the biomass transfer hypothesis under moderate grazing across the Tibetan plateau: a meta-analysis
Sun, Jian1; Zhan, Tianyu2; Liu, Miao1; Zhang, Zhenchao; Wang, Yi2; Liu, Shiliang3; Wu, Gao-lin; Liu, Guohua5; Tsunekawa, Atsushi1
2019-12-06
Source PublicationPLANT AND SOIL
ISSN0032-079X
Pages-
AbstractAim We aimed to explore the general response patterns of plant biomass allocation to grazing disturbance and to test two important hypotheses, optimal partitioning and isometric allocation, for explaining potential mechanisms by which grazing controls biomass distribution in an alpine grassland on the Tibetan Plateau. Methods We identified 57 relevant papers about grazing on the Tibetan Plateau, from which 366 data sets suitable for the meta-analysis were extracted. Effect sizes were assessed by computing natural log-converted response ratios of response variables. Percentage change relative to control was used for each estimate of grazing effects. Results The aboveground biomass, soil water content (SWC), soil organic carbon, soil total nitrogen, and soil total phosphorus significantly decreased with increased grazing intensities, while plant species richness (SR), soil bulk density (SBD) and the ratio of root to shoot exhibited the opposite tendency. Belowground biomass (BGB) showed no significant differences under light and high grazing intensities while apparently increased under moderate grazing intensity (MG) that verifies the biomass transfer hypothesis. BGB was positively related to SBD and SR but was negatively associated with SWC. Conclusions The biomass transfer in MG supports the optimal partitioning hypothesis that plants partition biomass among various organs to maximize growth rate responding to environmental stress. The findings suggest that the primary mechanisms leading to the enhancement of BGB in MG are compensatory growth of individual plants, a dwarfing tendency within the plant community, a significant increase in species richness, and changes in soil microbial communities resulting from grazing.
Department城市与区域生态国家重点实验室
KeywordAlpine grassland Arid region Grazing Meta-analysis Biomass transfer hypothesis
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/42485
Collection城市与区域生态国家重点实验室
Affiliation1.Chinese Acad Sci, Synth Res Ctr Chinese Ecosyst Res Network, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, 11A Datun Rd, Beijing 100101, Peoples R China
2.Tottori Univ, Arid Land Res Ctr, Tottori 6800001, Japan
3.China Chengdu Univ Technol, Chengdu 610059, Sichuan, Peoples R China
4.Beijing Normal Univ, Sch Environm, Beijing 100875, Peoples R China
5.Chinese Acad Sci & Minist Water Resource, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
6.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
Recommended Citation
GB/T 7714
Sun, Jian,Zhan, Tianyu,Liu, Miao,et al. Verification of the biomass transfer hypothesis under moderate grazing across the Tibetan plateau: a meta-analysis[J]. PLANT AND SOIL,2019:-.
APA Sun, Jian.,Zhan, Tianyu.,Liu, Miao.,Zhang, Zhenchao.,Wang, Yi.,...&Tsunekawa, Atsushi.(2019).Verification of the biomass transfer hypothesis under moderate grazing across the Tibetan plateau: a meta-analysis.PLANT AND SOIL,-.
MLA Sun, Jian,et al."Verification of the biomass transfer hypothesis under moderate grazing across the Tibetan plateau: a meta-analysis".PLANT AND SOIL (2019):-.
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