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تأثیر آتشسوزی بر ساختار و تجدید حیات گونههای چوبی در اکوسیستم جنگلی‌های زاگرس میانی، مطالعه موردی: تنگه بزازخانه کرمانشاه | ||
| تحقیقات حمایت و حفاظت جنگلها و مراتع ایران | ||
| مقاله 5، دوره 14، شماره 2 - شماره پیاپی 28، اسفند 1395، صفحه 122-135 اصل مقاله (375.81 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijfrpr.2017.109527 | ||
| نویسندگان | ||
| سعیده کریمی* 1؛ حسن پوربابایی2 | ||
| 1دانشآموخته کارشناسی ارشد، دانشکده منابع طبیعی، دانشگاه گیلان، ایران | ||
| 2گروه جنگلداری، دانشکده منابع طبیعی، دانشگاه گیلان، ایران | ||
| چکیده | ||
| آتشسوزی یکی از عوامل مهم ایجاد اختلال در اکوسیستم های جنگلی است و به عنوان یک آشفتگی بر ساختار و تجدید حیات گونههای گیاهی تأثیرگذار است. هدف از این تحقیق، بررسی اثر آتش بر ساختار گونههای چوبی و تجدید حیات آنها در قسمتی از جنگلهای زاگرس میانی واقع در شمال شرق استان کرمانشاه بود. بدین منظور 80 هکتار از این جنگلها ( 40 هکتار منطقه آتشسوزی شده و 40 هکتار منطقه شاهد) مورد بررسی قرار گرفت. در مجموع 80 قطعه نمونه 1000 مترمربعی به شکل دایره به روش تصادفی – سیستماتیک و با استفاده از شبکه آماربرداری 100× 100 متر برداشت شد. نتایج نشان داد که آتشسوزی در لایه درختی و زادآوری باعث تغییر در ترکیب جنگل نشده است و در هر دو منطقه برودار (Q. brantii) گونه غالب بود. اما تراکم درختی و زادآوری و همچنین تراکم جستها به طور معنیدار در منطقه آتشسوزی شده بیشتر و بالعکس در لایه درختچهای کمتر از منطقه شاهد به دست آمد. تعداد درختان در طبقات قطری پایین بیشتر بود. این موضوع در میانگین قطر برابرسینه و سطح مقطع برابر سینه اثر گذار بود، بهطوریکه با افزایش قابل توجه درختان کم قطر در منطقه آتشسوزی شده میانگین قطر و به تبع آن سطح مقطع کمتر از منطقه شاهد حاصل شد که این مسأله نشان میدهد که جنگل پس از گذشت نه سال از وقوع آتشسوزی تا حدودی مراحل بازسازی خود را طی کرده و تبدیل به جنگل جوان شده است. | ||
| کلیدواژه‌ها | ||
| آتش سوزی؛ ساختار؛ جست گروه؛ تراکم گونه های چوبی؛ زاگرس | ||
| عنوان مقاله [English] | ||
| The effect of fire on structure and regeneration of woody species in the central Zagros forests ecosystem, case study: Bazazkhaneh Strait forest area in Kermanshah province. | ||
| نویسندگان [English] | ||
| Saeedeh Karimi1؛ Hasan Pourbabaei2 | ||
| 2Department of Forestry, Faculty of Natural Resources, University of Guilan. Iran | ||
| چکیده [English] | ||
| An important cause of forest destruction is fire. Fire disturbances affected structure and regeneration of forest stand. This study aimed to investigate the effect of fire on structure and regeneration of woody species in Bazazkhaneh strait forests, the north - east of Kermanshah province. For this purpose, a random-systematic sampling lay out (with interval distance of 100 m) was applied to collect data in 80 sampling plots (40 plots in burnt area and 40 plots in unburnt area) where represented 80-ha of study plot. Results indicated that fire did not change forest composition. Oak, Quercus brantii was the dominant species in both burnt and unburnt areas. In tree layer, tree density, regeneration, and coppice density in unburnt area was significantly higher than those values in burnt area. In contrast, in shrub layer, density of individuals, regeneration, and coppice density in burnt area was significantly higher than those values of unburnt area. A reverse J-shaped diameter distribution was found in both burnt and unburnt areas. . However, fire affected the diameter at breast height (DBH) classes and basal area which was lower in burnt area than unburnt area. Data showed that young trees with small DBH were abundant in burnt area when compared with unburnt area. It was found that presence of young trees was good sign of forest recovery after nine years of fire. | ||
| کلیدواژه‌ها [English] | ||
| fire, Structure, coppice, Woody species density, Zagros | ||
| مراجع | ||
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