بررسی تأثیر آشفتگی انسانی بر فلور، ترکیب پوشش گیاهی و کیفیت فلوریستیک با استفاده از ضریب محافظه‌کاری در جنگل‌های زاگرس میانی (جنگل‌های شینه قلایی، استان لرستان)

نوع مقاله: علمی - پژوهشی

نویسندگان

1 دانشجوی دکتری جنگل‌شناسی و اکولوژی جنگل، دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان، لرستان، ایران.

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

3 دانشیار، گروه مهندسی آبخیزداری، دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان، لرستان، ایران.

چکیده

هدف از این پژوهش بررسی اثر آشفتگی‌های انسانی بر فلور، ترکیب پوشش گیاهی و کیفیت فلوریستیک جوامع جنگلی دارمازو در زاگرس میانی است. دو منطقة یکسان با کاربری متفاوت انتخاب شدند. در هر کاربری برای برداشت پوشش درختی، علفی و زی‌توده به­ترتیب از هشت پلات 2500 مترمربعی، 48 ریز­قطعه­نمونه یک مترمربعی و 24 کوادرات 25/0 مترمربعی به‌صورت تصادفی استفاده شد. پس از شناسایی گونه‌های گیاهی با توجه به مقدار تعلقه آنها در برابر آشفتگی­ها ضریب محافظه­کاری تعیین شد. بر اساس نتایج در هر کاربری تیره‌های Asteraceae، Poaceae و Fabaceae غالب­ترین تیره­ها، تروفیت­ها و همی­کریپتوفیت­ها رایج­ترین شکل زیستی و گونه­های ایرانی تورانی مهم‌ترین کوروتیپ مشاهده شده بودند. نتایج نشان داد بیشترین تعداد گونه‌های گیاهی کاربری تخریب­شده در طبقه 1 جای دارند و هیچ گونه‌ای در طبقه 4 (گونه­هایی با پای­بندی بالا و حساس) جای ندارد. با توجه به تشابه غنای گونه‌ای در دو کاربری برای بررسی هرچه بهتر وضعیت پوشش گیاهی آنها از شاخص کیفیت فلوریستیک استفاده شد و مقدار آن در کاربری حفاظت­شده بیشتر بود. همچنین بیشترین تعداد گونه­های بومی، تاج­پوشش درختی، زی‌توده، تعداد درخت در هکتار و متوسط درصد تاج­پوشش علفی در کاربری حفاظت­شده که کمترین مداخلات انسانی در آن وجود دارد، مشاهده شد.

کلیدواژه‌ها


عنوان مقاله [English]

Effects of anthropogenic disturbance on flora, vegetation composition and floristic quality of middle Zagros Forest using conservatism coefficient (Shine Qelaii Forest, Lorestan province)

نویسندگان [English]

  • Zahra Veiskarami 1
  • Babak Pilehvar 2
  • Ali Haghizadeh 3
1 Ph.D. Student of Forestry and forest ecology, Agriculture and Natural resources faculty Lorestan University, Khorramabad, I. R. Iran.
2 Associate Professor, Forestry Department, Faculty of Agriculture and Natural resources, Lorestan University, Khorramabad, I. R. Iran.
3 Associate Professor, Watershed Department, Faculty of Agriculture and Natural resources, Lorestan University, Khorramabad, I. R. Iran.
چکیده [English]

This study aimed to investigate the effects of anthropogenic disturbance on flora, vegetation composition, and floristic quality of Gall oak community in middle Zagros forests. Two sites with the same ecological condition and different land uses were selected. In order to determine the tree canopy cover, ground flora cover and herbaceous biomass, eight 2500 m2 plots, 48 micro plots with 1 m2 area, and 24, 0.25 m2 quadrats were used, respectively. The coefficient of conservatism of each species were determined based on the resistance to disturbances and their fidelity to region. The result showed that Asteraceae, Poaceae, and Fabaceae were the most dominant families and Therophytes and Hemicryptophytes were the most common life forms. The Irano-Touranian species were the most important chorotypes in this area. The most species fall in the first order of conservatism coefficient classes in unprotected area and no species were seen in the 4th class. The results showed no difference in species richness in the two land uses so in order to investigate the vegetation, the floristic quality index (FQI) was used. The value of (FQI) in protected area was more than unprotected. The results also showed that protected land use with the least human intervention has the most native species, tree crown canopy, biomass, the number of trees per hectare and herbaceous canopy cover.

کلیدواژه‌ها [English]

  • Floristic
  • Native species
  • Vegetation
  • Zagros
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