نوع مقاله : مقاله کامل علمی پژوهشی
نویسندگان
1 گروه جنگلداری دانشکده منابع طبیعی و علوم دریایی نور دانشگاه تربیت مدرس
2 دانشار گروه جنگلداری دانشکده منابع طبیعی و علوم دریایی نور دانشگاه تربیت مدرس
3 گروه جنگلداری دانشکده منابع طبیع دانشگاه تربیت مدرس
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Awareness of the impact of forest various management methods on forest regeneration is necessary for forest maintenance and sustainable development. Gaps occurs in the forest canopy when trees dry out and die. Canopy gaps have great importance in forest ecosystems and increase the forest biodiversity by establishment of new species and development of natural scenery. This study aimed to investigate the effect of canopy gaps size and dead trees on natural regeneration in control compartment of the Experimental Forest Station of Tarbiat Modares University (Aghozchal district). Therefore, after an initial forest survey and determination of canopy gaps location, plots of 400m2 were sampled in the canopy gaps and adjacent to the existing dead trees and seedlings in the plots were studied in two separate parts: short (50cm height) seedlings. Also, species, number of dead trees, quality status (decay class) and destruction status of canopy gaps were recorded. The results showed that maximum and minimum number of dead trees based on the size of canopy gap was in very large group and small group respectively, and based on decay class is related to class 2 and 4. Logs become much more frequent than snags and the highest and lowest frequency of logs was beech and alder respectively and in contrast, for snags was alder and beech respectively. In comparison with other species, beech has the highest frequency in both parts of natural regeneration. Thus the presence of dead trees in the forest has a significant impact on the natural regeneration and forest biodiversity, high attention should be given for the important role of dead wood in order to achieve forest sustainability.
کلیدواژه‌ها [English]
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