آمار
| تعداد نشریات | 13 |
| تعداد شماره‌ها | 626 |
| تعداد مقالات | 6,517 |
| تعداد مشاهده مقاله | 8,746,529 |
| تعداد دریافت فایل اصل مقاله | 8,317,330 |
Dynamics and Structural characteristics of a natural unlogged oriental beech (Fagus orientalis Lipsky) stand during a 5-years period in Shast Kalate Forest, Northern Iran | ||
| Environmental Resources Research | ||
| مقاله 1، دوره 1، شماره 2، مهر 2013، صفحه 107-129 اصل مقاله (1.07 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22069/ijerr.2014.1689 | ||
| نویسندگان | ||
| Mojtaba Amiri* 1؛ Ramin Rahmani2؛ Khosro Sagheb-Talebi2؛ Hashem Habashi2 | ||
| 1Author and Reviewer (corresponding) | ||
| 2Author | ||
| چکیده | ||
| Investigation on structure and dynamics of natural forest ecosystems is an important issue for silvicultural decisions. The aim of this study is to analysis dynamics and structure of a beech stand during 5-year period in the Shast Kalateh forest in the Caspian region, North of Iran. Data were collected from a 16.9ha permanent research plot established in a natural unlogged stand in 2006. All living trees with a diameter at breast height of ≥7.5cm were measured. The analysis of results showed that the total living stand density and volume was fluctuated between 302 and 287Nha-1 and 504 to 472m3ha-1 over a 5-year period, respectively. Results also showed that the total density of deadwood increased from 21 to 27.7Nha-1 over the 5 years. During the study period the volume of died trees was 15.3m3ha-1, that was equal to 3% mortality compared to the living trees volume in 2006. The maximum proportion of stem numbers were found in the small diameter class (≤30cm), whereas the maximum volume of trees was found in the largest diameter class (>75cm). Another remarkable change was related to the amount of total volume in the diameter class (35-50 cm), which was 37.4 and 40.3 m3ha-1 from 2006 to 2011, respectively. The results showed that the highest mortality rate happened among young trees with diameter ≤30cm. It can be concluded that Shast Kalateh forest as a part of beech forests is passing through a degradation phase, due to the significant number and volume of dead wood. | ||
| کلیدواژه‌ها | ||
| Forest Dynamics؛ Structural Characteristics؛ Oriental Beech؛ Caspian Region؛ Shast Kalate Forest | ||
|
آمار تعداد مشاهده مقاله: 3,819 تعداد دریافت فایل اصل مقاله: 2,732 |
||
سامانه مدیریت نشریات علمی. طراحی و پیاده سازی از سیناوب