Carbon and Nitrogen Accumulation and Decomposition from Coarse Woody Debris in a Naturally Regenerated Korean Red Pine (Pinus densiflora S. et Z.) Forest
- Authors
- Noh, Nam Jin; Yoon, Tae Kyung; Kim, Rae-Hyun; Bolton, Nicholas W.; Kim, Choonsig; Son, Yowhan
- Issue Date
- 6월-2017
- Publisher
- MDPI
- Keywords
- C:N ratio; decay class; decay rate; downed dead wood; litter component; natural forest; red pine forest; wood density
- Citation
- FORESTS, v.8, no.6
- Indexed
- SCIE
SCOPUS
- Journal Title
- FORESTS
- Volume
- 8
- Number
- 6
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/83393
- DOI
- 10.3390/f8060214
- ISSN
- 1999-4907
- Abstract
- The contribution of coarse woody debris (CWD) to forest carbon (C) and nitrogen (N) dynamics is poorly quantified. This study quantified total C and N content in CWD and estimated the decomposition rates of CWD at different decay stages in a 70-year-old naturally regenerated Korean red pine forest (Pinus densiflora S. et Z.). The N concentration in CWD varied among species and decay classes (from 0.15% to 0.82%), and exhibited a decreasing pattern in C:N ratios with increasing decay class. Total CWD amounts of 4.84 Mg C ha(-1), dominated by pine logs (45.4%) and decay class III (40.0%), contained total N of 20.48 kg N ha(-1), which was approximately nine times the N input from annual tree mortality. In addition, this study demonstrated that the decay constant rate k was 0.2497 for needle litter, whereas k values were 0.0438, 0.0693, 0.1054, and 0.1947 for red pine CWD of decay class I, II, III, and IV, respectively. The decay rates were significantly related to wood density, N concentration, and C:N ratio across the decay classes of CWD. The results suggest that the C:N ratio of CWD is a key factor affecting its decomposition.
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Collections - College of Life Sciences and Biotechnology > Division of Environmental Science and Ecological Engineering > 1. Journal Articles
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