tailieunhanh - Báo cáo lâm nghiệp: "Coarse woody debris carbon stocks in natural spruce forests of Babia hora"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: Coarse woody debris carbon stocks in natural spruce forests of Babia hora. | JOURNAL OF FOREST SCIENCE 56 2010 9 397-405 Coarse woody debris carbon stocks in natural spruce forests of Babia hora K. Merganicova1 2 J. Merganic1 2 ỵ Department of Forest Management Faculty of Forestry and Wood Sciences Czech University of Life Sciences Prague Prague Czech Republic 2Forest Research Inventory and Monitoring ABSTRACT Although coarse woody debris CWD represents one of the major carbon pools in natural forest ecosystems little information is available about its CWD carbon stocks. This study demonstrates the importance of proper estimation of carbon stocks in CWD which accounts for the decay process of CWD on an example of a natural mountainous spruce forest located in Central Europe. The study accounts for aboveground coarse woody debris including standing dead trees lying deadwood and naturally formed stumps. Basic mensurational information diameter height decay class about dead wood was collected in the field during the inventory of the forests of the nature reserve Babia hora. The data were used for the calculation of CWD timber volume. In the next step CWD timber volume was converted to carbon stock using the carbon proportion of and density values of decay classes derived from the information published elsewhere. The analysis revealed that when CWD timber volume was converted to carbon stocks using the basic wood density of fresh wood C stocks were overestimated by 40 or more depending on the developmental stage and elevation. The results also revealed that as the elevation increases CWD carbon stocks decrease and the differences between the developmental stages diminish. Keywords Babia hora nature reserve deadwood decay elevation natural forest wood density Recently dead wood has become a widely discussed issue in forestry studies. The importance of its occurrence in forest stands has been emphasised in conjunction with the functioning and productivity of forest ecosystems Humphrey et al. 2004 biodiversity Ferris Humphrey 1999 Humphrey et