Autotrophic and heterotrophic respiration in needle fir and Quercus-dominated stands in a cool-temperate forest, central Korea |
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Authors: | Na-yeon Lee Jin-Woo Koo Nam Jin Noh Joon Kim Yowhan Son |
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Institution: | (1) Division of Environmental Science and Ecological Engineering, Korea University, Anam-Dong, Seongbuk-Gu, Seoul, 136-713, Korea;(2) Department of Atmospheric Sciences, Yonsei University, Seoul, 120-749, Korea;(3) Present address: National Park Research Institute, Korea National Park, Namwon-Si, Jeonllabuk-Do, 590-811, Korea; |
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Abstract: | To investigate annual variation in soil respiration (R
S) and its components autotrophic (R
A) and heterotrophic (R
H)] in relation to seasonal changes in soil temperature (ST) and soil water content (SWC) in an Abies holophylla stand (stand A) and a Quercus-dominated stand (stand Q), we set up trenched plots and measured R
S, ST and SWC for 2 years. The mean annual rate of R
S was 436 mg CO2 m−2 h−1, ranging from 76 to 1,170 mg CO2 m−2 h−1, in stand A and 376 mg CO2 m−2 h−1, ranging from 82 to 1,133 mg CO2 m−2 h−1, in stand Q. A significant relationship between R
S and its components and ST was observed over the 2 years in both stands, whereas a significant correlation between R
A and SWC was detected only in stand Q. On average over the 2 years, R
A accounted for approximately 34% (range 17–67%) and 31% (15–82%) of the variation in R
S in stands A and Q, respectively. Our results suggested that vegetation type did not significantly affect the annual mean
contributions of R
A or R
H, but did affect the pattern of seasonal change in the contribution of R
A to R
S. |
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Keywords: | |
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