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بررسی ترکیب و تنوع گونهای تودههای شاخه و دانهزاد جنگلهای ارسباران | ||
پژوهش و توسعه جنگل | ||
دوره 9، شماره 3، آذر 1402، صفحه 335-347 اصل مقاله (582.38 K) | ||
نوع مقاله: علمی - پژوهشی | ||
شناسه دیجیتال (DOI): 10.30466/jfrd.2023.54450.1641 | ||
نویسندگان | ||
سجاد قنبری* 1؛ عایشه اسماعیلی2 | ||
1دانشیار، گروه جنگلداری، دانشکده کشاورزی و منابع طبیعی اهر، دانشگاه تبریز، تبریز، ایران | ||
2دانشآموخته دکتری جنگلداری، دانشکده منابع طبیعی، دانشگاه ارومیه، ارومیه، ایران | ||
چکیده | ||
تشریح کمی تودههای جنگلی از نظر ترکیب و تنوع گونهای بهعنوان یکی از مهمترین ابزارها در مدیریت جنگل است. هدف از پژوهش پیشرو، بررسی ترکیب و تنوع گونهای تودههای شاخه و دانهزاد جنگلهای ارسباران است. برای انجام این پژوهش در منطقه مورد بررسی 24 قطعهنمونه مستطیلی شکل به مساحت نیم هکتار (با ابعاد 50 متر در 100 متر) بهصورت منظم تصادفی پیاده شد. در هر قطعهنمونه با استفاده از روش آماربرداری صددرصد، مشخصههای ساختاری توده شامل گونه، تعداد جست، قطر و ارتفاع جستگروه اندازهگیری شد. برای بررسی تنوع زیستی از شاخص تنوع شانون-وینر، غنای مارگالف و یکنواختی پایلو استفاده شد. نتایج نشان داد که ممرز (8/63 درصد) بهعنوان گونه غالب و اوری (7/26 درصد) و افرا کرب (5/4 درصد) جزء گونههای همراه با بیشترین فراوانی بودند. میانگین ارتفاع، قطر جست گروه بهترتیب 45/6 متر، 14/12 سانتیمتر بهدست آمد. بیشترین و کمترین مقدار شاخص تنوعزیستی مربوط به شاخص پایلو (01/1) و شاخص مارگالف (71/0) است. پژوهش نشان داد پراکنش قطری توده حاکی از همسال و جوان بودن توده و شکل زنگولهای پراکنش ارتفاعی نیز بیانگر تجمع بیشترین جستها در طبقات ارتفاعی میانی است. | ||
کلیدواژهها | ||
ارسباران؛ بلوط اوری؛ تنوع گونهای؛ ساختار | ||
مراجع | ||
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