월악산 용하계곡에 발달되어 있는 굴참나무림에서 2005년부터 2006년까지 지상부와 지하부 생물량, 낙엽층 그리고 토양의 유기탄소의 분포를 조사하였으며, 탄소수지를 파악하기 위해 토양 호흡량을 측정하였다. 지상부와 지하부 생물량에 분포된 탄소량은 각각 56.22, 13.90 ton C ha$^{-1}$이 었으며, 낙엽층과 토양의 유기탄소량은 각각 4.7 ton C ha$^{-1}$, 119.14 ton C ha$^{-1}$ 50 cm-depth$^{-1}$로, 조사지 굴참나무림의 전체 유기탄소량은 193.96 ton C ha$^{-1}$이었으며, 이중 61.43%의 유기탄소가 토양에 분포하는 것으로 조사되었다. 본 굴참나무림에서 연간 지상부와 지하부 생물량에 의한 유기탄소의 순 증가량은 7.68 ton C ha$^{-1}$ yr$^{-1}$이었으며, 토양호흡을 통해 6.21 ton C ha$^{-1}$ yr$^{-1}$의 유기탄소가 방출되어 본 굴참나무림에서는 연간 대기로부터 1.47 ton C ha$^{-1}$ yr$^{-1}$가 순흡수되는 것으로 조사되었다.
Organic carbon distribution and carbon budget of a Quercus variabilis forest in the Youngha valley of Mt. Worak National Park were investigated. Carbon in above and below ground standing biomass, litter layer, and soil organic carbon were measured from 2005 through 2006. For the estimation of carbon budget, soil respiration was measured. The amount of carbon allocated to above- and below-ground biomass was 56.22 and 13.90 ton C ha$^{-1}$. Amount of organic carbon in annual litterfall was 2.33 ton C ha$^{-1}$ yr$^{-1}$. Amount of soil organic carbon within 50 cm soil depth was 119.14 ton C ha$^{-1}$ 50 cm-depth$^{-1}$. Total amount of organic carbon in this Q. variabilis forest was 193.96 ton C ha$^{-1}$. Of these, 61.43% of organic carbon was allocated in the soil. Net increase of organic carbon in above- and below-ground biomass in this Q. variabilis forest was estimated to 7.68 ton C ha$^{-1}$ yr$^{-1}$. The amount of carbon evolved through soil respiration was 6.21 ton C ha$^{-1}$ yr$^{-1}$. Net amount of 1.47 ton C ha$^{-1}$ yr$^{-1}$ was absorbed from the atmosphere by this Q. variabilis forest.
