TianWangYanEtAl2010

Référence

Tian, D.L., Wang, G.J., Yan, W.D., Xiang, W.H., Peng, C. (2010) Soil respiration dynamics in cinnamomum camphora forest and a nearby liquidambar formosana forest in Subtropical China. Chinese Science Bulletin, 55(8):736-743. (Scopus )

Résumé

Climate change can significantly affect carbon cycling of forest ecosystems. The diurnal and seasonal dynamics of soil respiration (Rs) in Cinnamomum camphora and Liquidambar formosana forests were investigated by using infrared gas exchange analyzer of Li-Cor 6400-09 each month in 2006. Soil temperature and moisture were also measured. Diurnal variations in Rs varied with daily soil temperature in the two forests. Across the growing season, soil respiration peaked on July 28 due to higher soil temperature and moisture conditions. Seasonal Rs variations were predominantly influenced by soil temperature. Seasonal soil respirations in C. camphora and L. formosana forests were strongly related to soil temperature (x) at 5-cm depth (Rs = 0.1598e0.1377x (R2 = 0.9289, P = 0.001) and Rs = 0.2177e0.0962x (R2 = 0.927, P = 0.000)), while annual mean Rs rate was 2.614 and 1.397 μmol m-2 s-1 and Q10 values was 3.96 and 2.62 for the two forests, respectively. However, Rs was not influenced by seasonal changes in soil moisture (w) in the two forests in 2006. We developed two equations (Rs = -0.020w2+0.497w+0.562 (R2 = 0.109, P > 0.05), Rs = -0.001w2+0.072w+0.731(R2 = 0.053, P > 0.05)) to describe the relationship between Rs and soil moisture. A positive relationship between Rs and soil moisture were observed when soil moisture was below 12.43% and 18.00%, but when soil moisture exceeded threshold values of 12.43% and 18.00%, soil moisture became the restraint factor for Rs. Long-term observations of soil respiration and moisture are required to understand the temporal dynamics of soil respiration. © 2009 Science in China Press and Springer-Verlag GmbH.

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@ARTICLE { TianWangYanEtAl2010,
    AUTHOR = { Tian, D.L. and Wang, G.J. and Yan, W.D. and Xiang, W.H. and Peng, C. },
    TITLE = { Soil respiration dynamics in cinnamomum camphora forest and a nearby liquidambar formosana forest in Subtropical China },
    JOURNAL = { Chinese Science Bulletin },
    YEAR = { 2010 },
    VOLUME = { 55 },
    PAGES = { 736-743 },
    NUMBER = { 8 },
    ABSTRACT = { Climate change can significantly affect carbon cycling of forest ecosystems. The diurnal and seasonal dynamics of soil respiration (Rs) in Cinnamomum camphora and Liquidambar formosana forests were investigated by using infrared gas exchange analyzer of Li-Cor 6400-09 each month in 2006. Soil temperature and moisture were also measured. Diurnal variations in Rs varied with daily soil temperature in the two forests. Across the growing season, soil respiration peaked on July 28 due to higher soil temperature and moisture conditions. Seasonal Rs variations were predominantly influenced by soil temperature. Seasonal soil respirations in C. camphora and L. formosana forests were strongly related to soil temperature (x) at 5-cm depth (Rs = 0.1598e0.1377x (R2 = 0.9289, P = 0.001) and Rs = 0.2177e0.0962x (R2 = 0.927, P = 0.000)), while annual mean Rs rate was 2.614 and 1.397 μmol m-2 s-1 and Q10 values was 3.96 and 2.62 for the two forests, respectively. However, Rs was not influenced by seasonal changes in soil moisture (w) in the two forests in 2006. We developed two equations (Rs = -0.020w2+0.497w+0.562 (R2 = 0.109, P > 0.05), Rs = -0.001w2+0.072w+0.731(R2 = 0.053, P > 0.05)) to describe the relationship between Rs and soil moisture. A positive relationship between Rs and soil moisture were observed when soil moisture was below 12.43% and 18.00%, but when soil moisture exceeded threshold values of 12.43% and 18.00%, soil moisture became the restraint factor for Rs. Long-term observations of soil respiration and moisture are required to understand the temporal dynamics of soil respiration. © 2009 Science in China Press and Springer-Verlag GmbH. },
    COMMENT = { Cited By (since 1996): 3 Export Date: 14 May 2012 Source: Scopus CODEN: CSBUE doi: 10.1007/s11434-009-0452-4 },
    ISSN = { 10016538 (ISSN) },
    KEYWORDS = { Carbon cycle, Soil CO2 flux, Soil moisture, Soil temperature, Temporal dynamics, Cinnamomum camphora, Dryobalanops, Liquidambar, Liquidambar formosana },
    OWNER = { Luc },
    TIMESTAMP = { 2012.05.14 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-77949278157&partnerID=40&md5=35f7cdc54f3b3e0551d94b6f8e7c25e9 },
}

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