تنوع گیاهی منطقۀ شکارممنوع سربند (دیباج، استان سمنان)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد گروه علوم گیاهی، دانشکدۀ زیست‌شناسی و پژوهشکدۀ علوم زیستی، دانشگاه دامغان، دامغان، ایران

2 استادیار گروه علوم گیاهی، دانشکدۀ زیست‌شناسی و پژوهشکدۀ علوم زیستی، دانشگاه دامغان، دامغان، ایران

چکیده

در پژوهش حاضر، فلور منطقۀ سربند دیباج بررسی شده است. منطقۀ شکارممنوع سربند با مساحت تقریبی 4 هزار هکتار و گسترۀ ارتفاعی 2000 تا 3650 متر در 12 کیلومتری شمال‌شرقی شهر دیباج (52 کیلومتری شمال دامغان، استان سمنان) واقع‌شده و بر اساس طبقه‌بندی دومارتن دارای اقلیم خشک و میانگین بارندگی سالانه 5/137 میلی‌متر است. درمجموع، 285 گونه متعلق به 178 جنس و 45 تیره شناسایی شدند. تیره‌های Asteraceae (تیرۀ گل ستاره‌ای) با 22 جنس و 40 گونه،Brassicaceae  (تیرۀ کلم) با 25 جنس و 32 گونه و Poaceae (تیرۀ گندم) با 16 جنس و
26 گونه تیره‌های بزرگ منطقه و جنس‌های Astragalus (گون) با 12 گونه، Allium (پیاز) با 7 گونه، Cousinia (هزارخار) و Alyssum (قدومه) با 6 گونه وGagea (نجم طلایی) با 5 گونه دارای بیشترین غنای گونه‌ای هستند. بررسی پراکنش جغرافیایی گونه‌های گیاهی منطقه نشان داد 52/60 درصد گونه‌ها به ناحیۀ ایرانی - تورانی،
67/20 درصد به نواحی ایرانی - تورانی/اروپا - سیبری و غیره تعلق دارند. همی‌کریپتوفیت‌ها (67/54 درصد) بیشترین شکل زیستی منطقه را تشکیل داده‌ا‌ند. از مجموع گیاهان شناسایی‌شده در منطقه، 36 گونه انحصاری ایران و 44 گونه دارای ارزش دارویی هستند. بر اساس معیارهای اتحادیه بین‌المللی حفاظت طبیعت 33 گونه در فهرست گونه‌های در معرض خطر قرار می‌گیرند که از این تعداد، 4 گونۀ Cousinia rhabdodes، Astragalus catacamptus، A. megalocystis و A. perdurans جزو گونه‌های آسیب‌پذیر منطقه هستند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Plant Diversity of Sarband Hunting Prohibited Area (Dibaj, Semnan Province)

نویسندگان [English]

  • Alame Bardsiri 1
  • Reza Naderi Alamdardehi 2
  • Atefe Amirahmadi 2
1 M. S. Student of Department of Plant Sciences, School of Biology and Institute of Biological Sciences, Damghan University, Damghan, Iran.
2 Assistant Professor Department of Plant Sciences, School of Biology and Institute of Biological Sciences, Damghan University, Damghan, Iran.
چکیده [English]

The study is concerned with the floristic investigation of Sarband prohibited area (Dibaj). The region with an area of approximately 4000 hectares is located in 12 km northeast of Dibaj (52 km north of Damghan, Semnan Province) ranging from 2000-3650 m. Sarband area with an average annual precipitation of 137.5 mm a dry climate based on Domarten’s climate classification. A total of 285 species belonging to 178 genera and 45 families were identified. The richest families species were Asteraceae (22 genara, 40 species), Brassicaceae (25 genera, 32 species) and Poaceae (16 genera, 26 species), respectively. Also, the genus Astragalus with 12 species, Allium with 7 species, Cousinia and Alyssum each with 6 species and Gagea with 5 species, are the largest genera in the region. Phytogeographical distribution of plant species showed that 60.52% of species belong to the Irano-Turanian region, followed by Irano-Turanian/Europe-Siberia: 20.67% and etc. Hemicryptophytes (54.76% of all species) were the most common life form in the region. 36 Iranian endemic species and 44 medicinal plant species were recognized in the region. Moreover, 33 plant species were listed as threatened species, of which, four species including Cousinia rahbdodes, Astragalus catacamptus, A. megalocystis and A. perdurans were categorized as vulnerable species based on the criteria of the International Union for Conservation of Nature.

کلیدواژه‌ها [English]

  • Phytogeographical Distribution
  • Sarband
  • Semnan
  • Life Form
  • Floristic Study

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