نوع مقاله : علمی- پژوهشی
نویسندگان
1 دکترای جنگلداری از دانشگاه آزاد اسلامی واحد علوم و تحقیقات / کارشناس ارشد سازمان جنگلها، مراتع و آبخیزداری کشور.
2 عضو هیأت علمی مؤسسه تحقیقات جنگلها و مراتع.
3 دانشیار دانشکده منابع طبیعی دانشگاه تهران.
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
A continuous forest cover depends on the continuity and establishment of natural regeneration, which is a slow process in undisturbed and virgin forests.
The following investigation is carried out in a protected natural undisturbed beech forest in Kelardasht region, Mazandaran province.
All the main three development stages (initial, optimal and decay) are recognized in the studied stand. Establishment of regeneration begins with falling of dead trees and with creation of gaps.
Results showed that the highest frequency of gaps belongs to areas in mean size of 550 m2 with falling of two dead trees; whereas, the lowest frequency belongs to an area of 1200-1700 m2 created with falling of more than four trees. The highest number of seedling is observed in the decay stage (17600-ha). Number of seedlings obviously decreases in other development stages.
کلیدواژه‌ها [English]
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