Characteristics of Soil Respiration in Pinus densiflora Stand Undergoing Secondary Succession by Fire-induced Forest Disturbance.
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The purpose of this study is to compare soil CO2 efflux between burned site and unburned site dominated by Pinus densiflora forest in the Samcheok area of the East Coast fire in 2000 and measure soil CO2 efflux and environmental factors between April 2011 to March 2012. Soil CO2 efflux was measured with LI-6400 once a month, and the 10cm depth soil temperature, air temperature, and soil moisture contents were measured in continuum with Data Loggers. Soil CO2 efflux showed the maximum value in August as 417.8 mg CO2•m-2•h-1 (burned site) and 1175.1 mg CO2•m-2•h-1 (unburned site), while it showed the minimum value as 41.4 mg CO2•m-2•h-1 (burned site) in December and 42.7 mg CO2•m-2•h-1 (unburned site) in February. The result showed the high correlation between soil CO2 efflux and the seasonal changes in temperature. More specifically, soil temperature showed higher correlation with soil CO2 efflux in burned site (R2 = 0.932, P < 0.001) and unburned site (R2 = 0.942, P < 0.001) than the air temperature in burned site (R2 = 0.668, P < 0.01) and unburned site(R2 = 0.729, P < 0.001). Q10 values showed higher sensitivity in unburned site (4.572) than in burned site (2.408). The total soil CO2 efflux was obtained with the exponential function between soil CO2 efflux and soil temperature during the research period, and it showed 2.5 times higher in unburned site (35.59 ton CO2•ha-2•yr-1) than burned site (14.69 ton CO2•ha-2•yr-1).
Abstract
The purpose of this study is to compare soil CO2 efflux between burned site and unburned site dominated by Pinus densiflora forest in the Samcheok area of the East Coast fire in 2000 and measure soil CO2 efflux and environmental factors between April 2011 to March 2012. Soil CO2 efflux was measured with LI-6400 once a month, and the 10cm depth soil temperature, air temperature, and soil moisture contents were measured in continuum with Data Loggers. Soil CO2 efflux showed the maximum value in August as 417.8 mg CO2•m-2•h-1 (burned site) and 1175.1 mg CO2•m-2•h-1 (unburned site), while it showed the minimum value as 41.4 mg CO2•m-2•h-1 (burned site) in December and 42.7 mg CO2•m-2•h-1 (unburned site) in February. The result showed the high correlation between soil CO2 efflux and the seasonal changes in temperature. More specifically, soil temperature showed higher correlation with soil CO2 efflux in burned site (R2 = 0.932, P < 0.001) and unburned site (R2 = 0.942, P < 0.001) than the air temperature in burned site (R2 = 0.668, P < 0.01) and unburned site(R2 = 0.729, P < 0.001). Q10 values showed higher sensitivity in unburned site (4.572) than in burned site (2.408). The total soil CO2 efflux was obtained with the exponential function between soil CO2 efflux and soil temperature during the research period, and it showed 2.5 times higher in unburned site (35.59 ton CO2•ha-2•yr-1) than burned site (14.69 ton CO2•ha-2•yr-1).
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