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Responses of carbon dynamics to grazing exclusion in natural alpine grassland ecosystems on the QingZang Plateau

文献类型：期刊论文

作者Liu, Tianyuan2; Sun, Jian2; Chen, Youchao3; Zhou, Tiancai2; Shang, Hua1; Wang, Yingxin2,4; Wu, Junxi5; Mi, Qi2; Zhang, Jintao2; He, Wen2
刊名FRONTIERS IN PLANT SCIENCE
出版日期2022-11-11
卷号13页码:13
ISSN号1664-462X
关键词QingZang Plateau alpine grasslands grazing exclusion carbon dynamics meta-analysis
DOI10.3389/fpls.2022.1042953
通讯作者Sun, Jian()
英文摘要In the context of "Carbon Emissions Peak" and "Carbon Neutrality", grazing exclusion (GE) has been applied widely to rehabilitate degraded grasslands and increase carbon sequestration. However, on the QingZang Plateau (QZP), the impacts of GE on the carbon dynamics of alpine grasslands are poorly understood, particularly at a regional scale. To fill this knowledge gap, we evaluated the responses of carbon sequestration to GE in different alpine grasslands across QZP by using meta-analysis. The effects of GE on ecosystem carbon fractions were dependent on GE duration, grassland types and climate factors. Specifically, our results indicated that GE had more obviously positive effects on carbon stock across the alpine meadow than the alpine steppe. However, when considering different GE duration, the longer duration of GE was more effective for increasing ecosystem carbon sequestration (R-2 = 0.52, P<0.0001) in the alpine steppe. Our results further demonstrated that annual mean precipitation (AMP) and temperature (AMT) began to dominate ecosystem carbon sequestration after three years of GE duration across the alpine meadow; and AMP was an important climate factor limiting ecosystem carbon sequestration (R-2 = 0.34, P<0.01) in the alpine steppe. In terms of plant carbon fraction, GE generated continuous positive effect (P<0.05) on aboveground biomass with the increased GE duration in the alpine meadow, while this positive effect disappeared after the 8th year of GE duration. And no positive effects were found on belowground biomass in the 11th year in alpine steppe. For soil organic carbon (SOC), there existed periodic fluctuations (increased and then decreased) on SOC in response to GE. For microbial biomass carbon, there were no obvious trends in response to GE duration. In general, we highlighted that the responses of different carbon fractions (plant-soil-microbe) to GE were non-uniform at spatial and temporal scales, thereby we should adopt different carbon management practices for sustainable development of different grasslands.
WOS关键词SOIL ORGANIC-CARBON ; NORTHERN TIBET ; PLANT ; BIOMASS ; STORAGE ; MEADOWS ; VEGETATION ; PATTERNS ; FENCES
资助项目National Natural Science Foundation of China[41871040] ; Chinese Academy of Sciences[LHZX-2020-08] ; Qinghai Provincial People's Government[41871040] ; Second Scientific Expedition to the Qinghai-Tibet Plateau[2019QZKK0405]
WOS研究方向Plant Sciences
语种英语
出版者FRONTIERS MEDIA SA
WOS记录号WOS:000890202300001
资助机构National Natural Science Foundation of China ; Chinese Academy of Sciences ; Qinghai Provincial People's Government ; Second Scientific Expedition to the Qinghai-Tibet Plateau
源URL[http://ir.igsnrr.ac.cn/handle/311030/187262]  
专题中国科学院地理科学与资源研究所
通讯作者Sun, Jian
作者单位1.State Univ New Jersey, Dept Ecol Evolut & Nat Resources, Rutgers, New Brunswick, NJ USA
2.Chinese Acad Sci, Inst Tibetan Plateau Res, State Key Lab Earth Syst Resources & Environm Tibe, Beijing, Peoples R China
3.Zhejiang A&F Univ, Coll Environm & Resource Sci, Hangzhou, Peoples R China
4.Chinese Acad Forestry, Res Inst Forestry, Beijing, Peoples R China
5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Tianyuan,Sun, Jian,Chen, Youchao,et al. Responses of carbon dynamics to grazing exclusion in natural alpine grassland ecosystems on the QingZang Plateau[J]. FRONTIERS IN PLANT SCIENCE,2022,13:13.
APA Liu, Tianyuan.,Sun, Jian.,Chen, Youchao.,Zhou, Tiancai.,Shang, Hua.,...&Sun, Le.(2022).Responses of carbon dynamics to grazing exclusion in natural alpine grassland ecosystems on the QingZang Plateau.FRONTIERS IN PLANT SCIENCE,13,13.
MLA Liu, Tianyuan,et al."Responses of carbon dynamics to grazing exclusion in natural alpine grassland ecosystems on the QingZang Plateau".FRONTIERS IN PLANT SCIENCE 13(2022):13.

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来源：地理科学与资源研究所

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