Standing dead trees (snags) component of the close to nature silviculture in a mixed beech forestin north of Iran
2009
Sefidi, K., Ph.D Student ,Natural Recourses Faculty ,University of Tehran | Mohadjer, M.R.M., Professor Natural Recourses Faculty ,University of Tehran | Zobeiri, M., Professor Natural Recourses Faculty,University of Tehran | Etemad, V., Assistant Professor Natural Recourses Faculty ,University of Tehran
The standing dead trees (snags) component was assessed in part of the close to nature beech forest in north of Iran (112 and 214 compartment). The aim of this study is to quantify the quality and quantity of standing dead tree in mixed beech forest. In this research all of dead trees were measured. The results showed that the volume of snags is 36 and 32 % from total volume of dead trees in 112 and 214 (Down logs and Snags), respectively. The most of them were in 40 diameter class or more than. Meanwhile the most of snags located in southern slopes. Study of snags form in nature showed that most of them were snags with branches fallen off and main stem had broken. Compression snags form between beech and hornbeam snags showed that beech snags most had broken in main stem but horn beam snags intact branches. Cavity of snags was also study in this research. Results showed that the most of snags have cavity and only 7 % from them have not any cavity. The most of cavities were in heist above 2 m and study size of cavity showed the most of them had medium size(10 R20).Preserve standing dead trees (snags) in forest ecosystems will promote the longer-term persistence of sustainable snags as nesting habitat for cavity _ nesting birds.
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