CO2 sink assessments in forest and agro- ecosystems
Long-term monitoring and accurate measuring the net
ecosystem production (NEP) in forest ecosystems are important to understand the carbon balance under current and future global warming environments. Our study on carbon sink assessments is based on the biometric method in the forest and the agro- ecosystems through out the tropical, temperated and subarctic region. We have CO2 carried out the measurements of biomass, net primary productivity (NPP), soil CO2 efflux, stem respiration and net ecosystem productivity (NEP) in Korea, Thailand and Alaska since 2003.
Classification of vegetation (phytosociological study)
Plant community has studied from two standing points. One is focusing on its classification and the other on its dynamics. Our phytosociological studies aim to recognize vegetational units through finding the diagnomic species in their full floristic composition of communities, and to analyze its correlation with environments. We have extensively investigated all vegetation types in Korea as well as some vegetation types in China and Japan.
Dynamics of the forest (Regeneration process of the forest)
Forest communities are mosaics of patches, which develop as the result of natural disturbances. And regeneration occurs in gaps created by the death of canopy trees. In general, the mosaic theory is accepted as a valuable concept for understanding dynamics of forest communities. We clarified the regeneration process on Korean beech forest, Mongolian oak forest, and red pine forest.