DuanLiWuEtAl2019

Référence

Duan, M., Li, A., Wu, Y., Zhao, Z., Peng, C., DeLuca, T.H. and Sun, S. (2019) Differences of soil CO2 flux in two contrasting subalpine ecosystems on the eastern edge of the Qinghai-Tibetan Plateau: A four-year study. Atmospheric Environment. (Scopus )

Résumé

Alpine and subalpine ecosystems on Qinghai-Tibetan Plateau are rich in soil organic carbon and are among the most sensitive regions to climate change, while little is known about the dynamics of soil carbon dioxide (CO2) in alpine/subalpine ecosystems except for the grassland on the plateau. In this study, the monthly and inter-annual variations in soil CO2 emission from a subalpine coniferous forest and a subalpine shrubland ecosystem on the eastern edge of the Qinghai-Tibetan Plateau were investigated from 2012 to 2015 using the opaque steady-state chamber method. Soil CO2 flux rate during the growing season ranged from 153.3 to 683.6 mg m−2 h−1 in the coniferous forest, being twice of that (76.6–347.3 mg m−2 h−1) in the shrubland, due to the elevation-induced differences in soil temperature and water content and the vegetation-induced differences in soil carbon and nitrogen pools. Both ecosystems showed large monthly variations in soil CO2 flux rate, while relative to the coniferous forest, the shrubland had a less inter-annual variation in soil CO2 emission. The two ecosystems had the same temperature sensitivity of soil CO2 emission, which suggests that they will respond similarly to global warming concerning soil CO2 flux rate. The results highlight the importance of soil CO2 emission in subalpine forest and shrubland ecosystems, which can be helpful to reduce the uncertainty of regional estimates of carbon budget in subalpine regions under global warming. © 2018

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@ARTICLE { DuanLiWuEtAl2019,
    AUTHOR = { Duan, M. and Li, A. and Wu, Y. and Zhao, Z. and Peng, C. and DeLuca, T.H. and Sun, S. },
    TITLE = { Differences of soil CO2 flux in two contrasting subalpine ecosystems on the eastern edge of the Qinghai-Tibetan Plateau: A four-year study },
    JOURNAL = { Atmospheric Environment },
    YEAR = { 2019 },
    PAGES = { 166-174 },
    NOTE = { cited By 0 },
    ABSTRACT = { Alpine and subalpine ecosystems on Qinghai-Tibetan Plateau are rich in soil organic carbon and are among the most sensitive regions to climate change, while little is known about the dynamics of soil carbon dioxide (CO2) in alpine/subalpine ecosystems except for the grassland on the plateau. In this study, the monthly and inter-annual variations in soil CO2 emission from a subalpine coniferous forest and a subalpine shrubland ecosystem on the eastern edge of the Qinghai-Tibetan Plateau were investigated from 2012 to 2015 using the opaque steady-state chamber method. Soil CO2 flux rate during the growing season ranged from 153.3 to 683.6 mg m−2 h−1 in the coniferous forest, being twice of that (76.6–347.3 mg m−2 h−1) in the shrubland, due to the elevation-induced differences in soil temperature and water content and the vegetation-induced differences in soil carbon and nitrogen pools. Both ecosystems showed large monthly variations in soil CO2 flux rate, while relative to the coniferous forest, the shrubland had a less inter-annual variation in soil CO2 emission. The two ecosystems had the same temperature sensitivity of soil CO2 emission, which suggests that they will respond similarly to global warming concerning soil CO2 flux rate. The results highlight the importance of soil CO2 emission in subalpine forest and shrubland ecosystems, which can be helpful to reduce the uncertainty of regional estimates of carbon budget in subalpine regions under global warming. © 2018 },
    AFFILIATION = { Centre for Ecological Forecasting and Global Change, College of Forestry, Northwest A&F University, Yangling, 712100, China; Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China; College of Chemical and Environment Science, Shaanxi University of Technology, Hanzhong, 723000, China; College of Forestry and Conservation, University of Montana, Missoula, MT 59812, United States },
    AUTHOR_KEYWORDS = { Coniferous forest; Greenhouse gas emission; High elevation; Shrubland; Subalpine region; Temperature sensitivity },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.atmosenv.2018.10.067 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85055970067&doi=10.1016%2fj.atmosenv.2018.10.067&partnerID=40&md5=695b3f5d6b160c42a2cf339cccc93812 },
}

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