Mass dynamics of coarse woody debris in an old-growth deciduous forest of Gwangneung, Korea

Tae Kyung Yoon, Nam Jin Noh, Rae Hyun Kim, Kyung Won Seo, Sue Kyoung Lee, Koong Yi, Im Kyun Lee, Jong Hwan Lim, Yowhan Son

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We investigated the mass dynamics of coarse woody debris (CWD) in an old-growth deciduous forest dominated by Quercus serrata, Carpinus laxiflora, and C. cordata in a 1 ha permanent plot of the Gwangneung Experiment Forest, Korea, from 2002 through 2010. CWD mass varied from 16.8 to 34.2 Mg ha-71, and the ratio of CWD mass to stand biomass varied from 0.06 to 0.13. The mean CWD mass input and loss rates were 4.81 Mg ha-71 yr-71 and 2.28 Mg ha-71 yr-71, respectively. A large heterogeneity of CWD mass, as represented by the spatial coefficient of variation (127.2%) and annual coefficient of variation (178.5%), might be inherent in the old-growth temperate forest, which consisted of large biomass trees. The decay rate constant, as estimated from the wood density change, was 0.049 yr-71. However, the large variation of annual CWD mass input could cause the overestimation of decay rate constant (0.167 yr-71) as calculated from the ratio of CWD mass input to CWD mass. According to the CWD decay class classification, class II (72.8%) comprised the majority of CWD mass. The proportion of CWD mass to total CWD mass was 57.5% for Q. serrata, 25.0% for C. laxiflora, and 10.4% for C. cordata, respectively, and corresponded to the proportion of stem biomass to total stem biomass. These data support the stability of the current status in this old-growth deciduous forest as representing the climax stage. Due to the relatively short-term measurement of CWD mass compared with the whole life span of CWD, additional long-term studies with various approaches are required to enhance the knowledge of CWD mass dynamics in this forest.

Original languageEnglish
Pages (from-to)145-150
Number of pages6
JournalForest Science and Technology
Issue number4
Publication statusPublished - 2011

Bibliographical note

Funding Information:
This work was supported by research grants from the Korea Forest Research Institute as ‘‘Long-Term Monitoring and Assessment of Climate Change Impact on Forest Ecosystem’’ (2002–2010).

Publisher Copyright:
© 2011 Korean Forest Society.


  • Coarse woody debris (CWD)
  • Decay rate constant
  • Gwangneung Experiment Forest
  • Mass dynamics
  • Old-growth deciduous forest

ASJC Scopus subject areas

  • Forestry
  • Management, Monitoring, Policy and Law


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