بررسی ترکیب و تنوع گونه‌های گیاهی در رویشگاه انجیلی (‏Parrotia persica C.A.Mey.‎‏) جنگل چفرود استان گیلان

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشجوی دکتری علوم زیستی جنگل، دانشکده منابع طبیعی دانشگاه گیلان، صومعه‌سرا، ایران

2 استاد، گروه علوم زیستی جنگل، دانشکده منابع طبیعی دانشگاه گیلان، صومعه‌سرا، ایران

3 دانش‌آموخته دکتری جنگل‌شناسی و اکولوژی جنگل، دانشکده منابع طبیعی دانشگاه گیلان، صومعه‌سرا، ایران

چکیده

این پژوهش با هدف شناسایی ترکیب و تنوع گیاهی در رویشگاه انجیلی واقع در جنگل چفرود در غرب استان گیلان انجام شد. به این منظور، پنج قطعه­نمونه یک­هکتاری به­صورت انتخابی در توده­های کمتر­دست­خورده انجیلی برداشت شد. در هر قطعه نمونه، تمامی گونه­های درختی در مراحل رویشی مختلف و گونه­های درختچه­ای شناسایی شدند. همچنین، 16 ریز­قطعه­نمونه چهار­مترمربعی در هر قطعه نمونه به­صورت منظم تصادفی اجرا و تمامی گونه­های علفی در آن شناسایی و ثبت شدند. شکل زیستی گونه­ها با استفاده از روش رانکایر، نواحی رویشی به کمک روش زُهَری و تنوع زیستی کل با استفاده از ناهمگنی سیمپسون، غنای منهنیک و یکنواختی اسمیت ویلسون به­دست آمدند. نتایج حاصل از بررسی ترکیب رستنی­های رویشگاه، 71 گونه گیاهی متعلق به 59 جنس و 43 خانواده را نشان داد. خانواده Rosaceae با 8 گونه و Cyperaceae و Poaceae هر یک با 4 گونه غنی­ترین خانواده­های گیاهی موجود در این رویشگاه بودند. همچنین، فانروفیت­ها با 44 درصد و همی­کریپتوفیت­ها با 25 درصد بیشترین شکل زیستی را به­خود اختصاص دادند. به­علاوه، از نظر پراکنش جغرافیایی بیشترین فراوانی با 52 درصد مربوط به عناصر اروپا سیبری به­دست آمد. همچنین، تنوع غنا و یکنواختی کل به­ترتیب 86/0، 08/1 و 65/0 محاسبه شدند. بر اساس نتایج این پژوهش، رویشگاه انجیلی غرب گیلان از رویشگاه­های متنوع هیرکانی است.

کلیدواژه‌ها


عنوان مقاله [English]

Investigation of composition and plant diversity of Persian ironwood (Parrotia persica ‎C.A. Mey) site, Chafroud’s forest of Guilan province

نویسندگان [English]

  • Saman Pourabbasi Shiraz 1
  • Hasan Pourbabaei 2
  • Abouzar Heidari Safari kouchi 3
1 PhD student of Forest Biology, Faculty of Natural Resources, University of Guilan, Sowme`eh Sara, I. R. ‎Iran‎
2 Professor, Department of Forest‎‏ ‏biology, Faculty of Natural Resources, University of Guilan, Sowme`eh ‎Sara, I. R. Iran‎
3 PhD of Silviculture and Forest Ecology, Faculty of Natural Resources, University of Guilan, ‎Sowme`eh Sara, I. R. Iran
چکیده [English]

The aim of this study was to identify the composition and diversity of plants in the Persian ironwood habitat in the Chefrood forest in western Guilan province. For this purpose, five one-hectare sample plots were randomly selected in less disturbed Parrotia persica stands. All tree and shrubs species were identified in each sample plot. Also, 16 micro-sample plots of four-square meters in each sample plot were executed by randomized systematic method and all herbaceous species were identified and recorded. The life form of species was determined using the Rankier method, geographical distribution of species was classified using Zohari method and total biodiversity was determined using Simpson heterogeneity, Menhenick richness and Smith-Wilson evenness. The results of the study of habitat vegetation showed 71 plant species belonging to 59 genera and 43 families. The family of Rosaceae with eight species and Cyperaceae and Poaceae each with four species were the richest plant families in this habitat. Phanrophytes with 44% and hemicryptophytes with 25% had the highest percentage of biological form. In terms of geographical distribution, the highest frequency was obtained with 52% related to Siberian European elements. Also, richness diversity and total element uniformity were calculated to be 0.86, 1.08 and 0.65, respectively. According to the results of the present study, the Persian Iron-wood habitat of West Guilan is one of the various Hyrcanian habitats.

کلیدواژه‌ها [English]

  • Plant diversity
  • geographical distribution
  • Persian ironwood habitat
  • Floristic form
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