국립생태원 캠퍼스 내 주요 식생의 탄소수지

Abstract

This study was conducted to quantify a carbon budget of major vegetation types established in the campus of the National Institute of Ecology (NIE). Carbon budget was measured for Pinus thunbergii and Castanea crenata stands as the existing vegetation. Net Primary Productivity (NPP) was determined by applying allometric method and soil respiration was measured by EGM-4. Heterotrophic respiration was calculated as 55% of total respiration based on the existing results. Net Ecosystem Production (NEP) was determined by the difference between NPP and heterotrophic respiration (HR). NPPs of P. thunbergii and C. crenata stands were shown in 4.9 ton C ha-1 yr-1 and 5.3 ton C ha-1 yr-1, respectively. Heterotrophic respirations of P. thunbergii and C. crenata stands were shown in 2.4 ton C ha-1 yr-1 and 3.5 ton C ha-1 yr-1, respectively. NEPs of P. thunbergii and C. crenata stands were shown in 2.5 ton C ha-1 yr-1 and 1.8 ton C ha-1 yr-1, respectively. Carbon absorption capacity for the whole set of vegetation types established in the NIE was estimated by applying NEP indices obtained from current study and extrapolating NEP indices from existing studies. The value was shown in 147.6 ton C ha-1 yr-1 and it was calculated as 541.2 tonCO2 ha-1 yr-1 converted into CO2. This function corresponds to 62% of carbon emission from energy that NIE uses for operation of various facilities including the glass domes known in Ecorium. This carbon offset capacity corresponds to about five times of them of the whole national territory of Korea and the representative rural area, Seocheongun. Considered the fact that ongoing climate change was originated from imbalance of carbon budget at the global level, it is expected that evaluation on carbon budget in the spatial dimension reflected land use pattern could provide us baseline information being required to solve fundamentally climate change problem.