국가산림자원조사 고정표본점 자료를 활용한 고사목의 탄소저장량 추정 = Estimation of Carbon Stocks in Coarse Woody Debris Using Permanent Sample Plot Data from the Korean National Forest Inventory

다국어 초록 (Multilingual Abstract)

The greenhouse gas reduction function of forests is crucial globally in ameliorating climate change. Varying research attempts to assess dead organic matter and carbon stock volume in soil have been conducted. The purpose of this study was to analyze changes in the occurrence of coarse woody debris (CWD) and related carbon stocks using data from the National Forest Inventory (NFI). To monitor changes in forest resources over time, this study used NFI data (2006-2020) that were collected from permanent sample plots every five years; 1,903 sample plots in which CWD occurred were analyzed at each time point and CWD volume was calculated based on tree stem volume. Carbon stocks of CWD were estimated by applying basic woody density and carbon fraction to CWD by tree type and tree decay level. The average volume of CWD decreased from 23.04 to 14.83 m3 ha-1 and carbon stocks of CWD were also reduced from 3.36 to 1.86 ton C ha-1. This analysis estimated carbon stocks of CWD in forests nationwide and the results can be utilized to build a greenhouse gas inventory. Long-term monitoring and research are needed to identify the changing characteristics of CWD carbon storage. As carbon storage in forests is interconnected, monitoring and model development should include trees, CWD, forest floor litter, and soil carbon cycles. Furthermore, an analysis of the effect of anthropogenic activities on carbon cycles in future research would be useful.

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