جوامع گیاهی اراضی پایین دست ذخیره گاه زیست کره ارسباران و اهمیت حفاظتی آن

نوع مقاله : مقاله پژوهشی

نویسنده

استادیار پژوهش، بخش تحقیقات گیاهشناسی، موسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

چکیده

DOR:98.1000/1735-0859.1397.16.190.32.2.1580.1606

    ذخیره­ گاه زیست­کره ارسباران، نهمین ذخیره­گاه زیست­کره در ایران با مساحت 78759 هکتار در شمال غرب ایران است که بخش اعظم اراضی آن شامل جنگل، مرتع و زمین­های کشاورزی است. اختلاف ارتفاع 265 متر تا 2865 متر از سطح دریا، وجود عوامل فیزیوگرافیکی، خاکی و خرد­اقلیم­ها باعث ایجاد رویشگاه­های مختلفی شده است که غنای فلوری منحصر بفرد آن را رقم زده است. مطالعه پوشش گیاهی اراضی پایین ­دست این منطقه با روش براون-بلانکه انجام گرفت. تجزیه و تحلیل داده‌ها (قطعه­های نمونه و گونه­های گیاهی) با رسته­بندی (Ordination) آنها بر اساس روش تحلیل ارتباط­های عاملی (Analyse Factorielle des Correspondance) (AFC) در برنامه آنافیتو (Anaphyto) انجام شد. در اراضی پایین­دست ذخیره­گاه زیست­کره ارسباران پنج جامعه و چهار زیرجامعه شامل 176 تاکسون شناسایی شده است که از این تعداد تاکسون 9/7 درصد را شکل زیستی فانروفیت، 5/8 درصد را شکل زیستی کامفیت، 25 درصد را شکل زیستی همی­کریپتوفیت، 5/4 درصد را شکل زیستی ژئوفیت و 54 درصد را شکل زیستی تروفیت تشکیل می­ دهند. با توجه به اهمیت جهانی این ذخیره­ گاه از نظر فلور، پوشش گیاهی و فون، حفاظت هر چه بیشتر آن به­عنوان میراث طبیعی برای آیندگان توصیه می‏ شود.
 
 

کلیدواژه‌ها


عنوان مقاله [English]

Plant associations of Arasbaran lowlands and its conservation significance

نویسنده [English]

  • B. Hamzeh’ee
چکیده [English]

Arasbaran Biosphere Reserve is the ninth Biosphere Reserve in Iran with a total area of 78759 hectares in northwest of Iran. Most of it is forest, pasture and agricultural lands. The difference between the height of 265 m and 2868 m above sea level, the presence of physiographic, soil and microclimates have created different habitats that have made its unique flora richness. Vegetation of lowlands of this area was carried out using Braun-Blanqet method. Data analysis (releves and plant species) was performed based on the Corrospondence factorial analysis (AFC) method in anaphyto software. In the lowlands of the Arasbaran Biosphere Reserve, Five associations and four subassociations including 176 taxa have been identified, of which 7.9% are phanerophytes, 8.5% chamaephytes, 25% hemicryptophytes, 4.5% geophytes and 54% terophytes. Considering the global importance of this Biosphere Reserve for flora, vegetation and fauna, its further conservation is recommended as a natural heritage for the future.
 
 

کلیدواژه‌ها [English]

  • Phytosociology
  • Ecoregion
  • conservation
  • Arasbaran
  • Iran
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