兰州大学机构库
Grazing-induced changes in soil microclimate and aboveground biomass modulate freeze-thaw processes in a Tibetan alpine meadow
Wang, Xiang1; Zi, Hongbiao1; Wang, Jianbin1; Guo, Xiaowei3,4; Zhang, Zhenhua3,4; Yan, Tao1; Wang, Qiang1; He, Jin-Sheng1,2
2023-11-01
Online publication date2023-07
Source PublicationAGRICULTURE ECOSYSTEMS & ENVIRONMENT   Impact Factor & Quartile
ISSN0167-8809 ; 1873-2305
Volume357
page numbers9
AbstractGrazing is the most important disturbance to grasslands, especially on the Tibetan Plateau, which sustains the livelihoods of tens of thousands of herders. However, the effects of grazing intensity and associated changes in vegetation on freeze-thaw processes (FTPs) in seasonal permafrost regions remain unclear. Here, two years of continuous in situ observations from a controlled grazing intensity experiment were used to examine FTPs and influencing factors in an alpine meadow on the Eastern Tibetan Plateau. Our results showed that a higher grazing intensity led to a shorter frozen period, extended freezing and thawing periods, and earlier initiation of freezing and thawing periods. Furthermore, grazing increased soil temperature and active (> 0 degrees C) and effective (> 10 degrees C) accumulated temperatures. The soil diurnal temperature range increased linearly with grazing intensity, whereas soil moisture did not vary with soil temperature. Our results demonstrated that the freezing and frozen periods were mainly influenced by soil temperature and the diurnal temperature range, whereas soil moisture played a critical role in the variation in the thawing period. The reduction in aboveground biomass elicited changes in FTPs, including shortening of the frozen period and lengthening of the thawing and freezing periods. Collectively, our results highlight that the combination of grazing-induced changes in vegetation and changes in subsurface temperature and moisture leads to changes in freezing and thawing processes.
KeywordAlpine grassland Human activity Freeze -thaw processes Soil diurnal temperature range Permafrost region
PublisherELSEVIER
DOI10.1016/j.agee.2023.108659
Indexed BySCIE
Language英语
WOS Research AreaAgriculture ; Environmental Sciences & Ecology
WOS SubjectAgriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS IDWOS:001054589000001
Original Document TypeArticle
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/568368
Collection兰州大学
Corresponding AuthorWang, Qiang; He, Jin-Sheng
Affiliation
1.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Herbage Improvement & Grassland Agro, 768 Jiayuguan W Rd, Lanzhou 730020, Peoples R China;
2.Peking Univ, Coll Urban & Environm Sci, Dept Ecol, Key Lab Earth Surface Proc,Minist Educ, 5 Yiheyuan Rd, Beijing 100871, Peoples R China;
3.Chinese Acad Sci, Qinghai Haibei Natl Field Res Stn Alpine Grassland, Northwest Inst Plateau Biol, Xining 810008, Peoples R China;
4.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Peoples R China
Recommended Citation
GB/T 7714
Wang, Xiang,Zi, Hongbiao,Wang, Jianbin,et al. Grazing-induced changes in soil microclimate and aboveground biomass modulate freeze-thaw processes in a Tibetan alpine meadow[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2023,357.
APA Wang, Xiang.,Zi, Hongbiao.,Wang, Jianbin.,Guo, Xiaowei.,Zhang, Zhenhua.,...&He, Jin-Sheng.(2023).Grazing-induced changes in soil microclimate and aboveground biomass modulate freeze-thaw processes in a Tibetan alpine meadow.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,357.
MLA Wang, Xiang,et al."Grazing-induced changes in soil microclimate and aboveground biomass modulate freeze-thaw processes in a Tibetan alpine meadow".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 357(2023).
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