شناسایی گیاگان و مقایسه ضریب محافظه‌کاری گونه‌های علفی سه تیپ جنگلی زاگرس مرکزی

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشجوی دکترای جنگل‌شناسی و اکولوژی جنگل، دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان، خرم‌آباد، ایران

2 دانشیار، گروه جنگلداری، دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان، خرم‌آباد، ایران

3 استادیار، گروه جنگلداری، دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان، خرم‌آباد، ایران

4 استادیار، گروه جنگل‌شناسی و اکولوژی جنگل، دانشکده علوم جنگل، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران

چکیده

 در این پژوهش با استفاده از فن ضریب محافظه­کاری به ­بررسی کیفیت فلورستیکی جنگل­های زاگرس مرکزی در ارتباط با آشفتگی­های محیطی پرداخته شد. بدین ­منظور اشکوب درختی مهم­ترین تیپ­های جنگلی زاگرس مرکزی با استفاده از 24 قطعه­نمونه 500 مترمربعی و اشکوب علفی آنها با استفاده از 72 ریزقطعه­نمونه تصادفی چهار مترمربعی برداشت شد. سپس فهرست گونه­های گیاهی برداشت­­شده در اختیار گیاه­شناسان برجسته کشور قرار گرفت تا با­توجه به­ مقدار حساسیت گونه­های گیاهی در برابر آشفتگی­ها و به­عبارتی مقدار پایبندی آنها به شرایط اکولوژیکی رویشگاه، ضریب محافظه­کاری گونه­های گیاهی را تعیین کنند. با توجه به نتایج ضریب محافظه­کاری، تنها تعداد کمی از گونه­های گیاهی شناسایی­­شده دارای دامنه بردباری اکولوژیکی خیلی حساس در برابر آشفتگی­ها و یا به­عبارتی دارای پایبندی بالا به شرایط اکولوژیک رویشگاه­ بودند. در­واقع بیش از نیمی از گونه­ها در پایین­ترین طبقه ضریب محافظه­کاری (1-3) جای گرفتند که بیشترین مقدار از این نظر در تیپ جنگلی گلابی وحشی مشاهده شد.

کلیدواژه‌ها

عنوان مقاله [English]

Taxonomy and determination of conservatism coefficient for herb layer of three forest types in central Zagross

نویسندگان [English]

  • Hamzeh Jafarisarabi 1
  • Babak Pilehvar 2
  • Kambiz Abrari Vajari 3
  • Seyed Mohammad Waez-Mousavi 4
1 Ph.D candidate of silviculture and forest ecology, Faculty of Agricultural and Natural Recourses, Lorestan University, Khorramabad, I. R. Iran
2 Associate Professor, Department of Forestry, Faculty of Agricultural and Natural Recourses, Lorestan University, Khorramabad, I. R. Iran
3 Assistant Professor, Department of Forestry, Faculty of Agricultural and Natural Recourses, Lorestan University, Khorramabad, I. R. Iran
4 Assistant Professor, Department of Silviculture and Forest Ecology, Gorgan University of Agricultural Sciences and Natural Recourses, Gorgan, I. R. Iran
چکیده [English]

This study investigates floristic quality of central Zagros forest in relation to environmental disturbances using conservatism coefficient. Tree layer of the most important forest types in central Zagros was surveyed using 24 plots (500 m2 area) and herb layer was measure by 72 plots (4 m2 area). Then the list of collected flora send to an expert group of botanist and ecologist to assign conservatism coefficient to them based on the amount of each species sensitivity to disturbances and fidelity to the ecological site condition. Based on the results only a few species take high rank score which means the most collected plant species were sensitive to the disturbances and have low fidelity to the site. In fact more than half of the collected species belong to the lowest class of conservatism coefficient (1-3), which pyrus glabra forest type involves the most plant species of this class.

کلیدواژه‌ها [English]

  • Conservatism coefficient
  • Crotype
  • Endemism
  • Life form

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پژوهش و توسعه جنگل
دوره 5، شماره 1
خرداد 1398
صفحه 73-91

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