Beech coarse woody debris characteristics in two virgin forest reserves in southern Slovenia
2002
Kraigher, H. | Jurc, D. | Kalan, P. | Kutnar, L. | Levanic, T. | Rupel, M. | Smolej, I. (Slovenian Forestry Inst., Ljubljana (Slovenia))
Beech (Fagus sylvatica L.) coarse woody debris (CWD) was studied in two forest reserves in southern Slovenia: Krokar and Rajhenavski Rog. Each tree (from over 100 trees per reserve) (including snag if remaining, log and crown parts) was enumerated, described (decay phase (1=least decomposed to 6=most decomposed), diameters at different lengths (cm), length (m), contact with soil, bark, herbs, moss coverage (all in %), exposure (sun, shaded)) and mapped and volume (m*[3)) calculated. For CWD of decay phases 1 to 3 (4) age-since-death was studied using dendrochrolonogy and comparisons to a standard dendrochronological sequence for the area. Sixty dead trees (82 logs and snags altogether) in Rajhenavski Rog from the 113 fallen trees were selected for C, N, S, P, K, pH, moisture and wood density analysis. The total volume of beech CWD in the sampled area in Rajhenavski Rog was 100 m*[3)/ha and 192 m*[3)/ha of silver fir CWD; for the sampled area in Krokar the total beech CWD volume was 57 m*[3)/ha and silver fir CWD 88 m*[3)/ha. N, S and P concentrations increased with decay phase, while C:N ratio declined. Age dependent decay curves were produced for 44 dated trees. The expected time for decay beyond decay phase 4 was over 32 years.
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