BIODIVERSITY OF DIATOMS IN THE KASHKAN RIVER IN THE ZAGROS MOUNTAINS, WESTERN IRAN

Document Type : Research Paper

Authors

1 Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran.

2 Department of Biology, Science and Research Branch , Islamic Azad University, Tehran

3 Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO),Tehran, Iran

Abstract

Iran is a country that serves as the spot for diverse landscapes and aquatic ecosystems. Zagros Mountains, as one of its main ranges and the important segment of Alpine-Himalayan orogenic system are known as the biodervisity hotspots for plants and animals worldwide. Despite the numerous rivers flowing in the area, little survey has been conducted about the diatom flora of its rivers. Diatoms are the most diverse microalgae that have great contribution to the primary production in the aquatic ecosystems. Due to importance of diatoms in the aquatic ecosystems and the ecological and geological importance of the Zagros in the world, we aim to study the diatom flora in the Kashkan River flowing in the Zagros Mountains. In this research, 48 epipelic and epilithic samples were collected along the Kashkan River in Spring 2019. A total of 91 taxa was identified from which four species were recorded as new for the diatom flora of Iran. Furthermore, identification of 10 taxa are provisional which are designated as cf., when finalized, these may also be recognized as new records. Meanwhile, twenty unidentified taxa which are marked as sp., are potetilly new species, in need of furthere investigations. These novel taxa are highlights and prominence of this study. Our results serves as a baseline for the diatoms biodiversity in the Zagros Mountain.

Keywords


Article Title [Persian]

تنوع زیستی دیاتومه‌های رودخانه کشکان در رشته کوه‌های زاگرس، غرب ایران

Authors [Persian]

  • سمیه صفی‌اله 1
  • سارا سعادتمند 2
  • سمیه خیری 3
  • علیرضا ایرانبخش 1
1 دانشجوی دکترای سیستماتیک گیاهی، گروه زیست‌شناسی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران، ایران
2 گروه زیست شناسی، دانشگاه آزاد اسلامی ، واحد علوم و تحقیقات ، تهران
3 استادیارپژوهش مؤسسه تحقیقات جنگل‌ها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران
Abstract [Persian]

ایران به‌عنوان کشوری با تنوع بالای اکوسیستم‌های آبی و خشکی به شمار می‌آید و رشته کوه‌های زاگرس به‌عنوان بخش مهمی از سیستم کوه‌زایی آلپ- هیمالایا هستند که برای گیاهان و جانوران به‌عنوان نقاط داغ تنوع زیستی در سطح جهان شناخته شده‌اند. با وجود رودخانه‌های بسیاری در این ناحیه ، مطالعات کمی در مورد فلور دیاتومه‌های رودخانه‌های آن انجام شده است. دیاتومه‌ها متنوع‌ترین ریزجلبک‌ها هستند که سهم زیادی را در تولید اولیه اکوسیستم‌های آبی دارند. باتوجه به‌اهمیت دیاتومه‌ها در اکوسیستم‌های آبی و اهمیت اکولوژیک و زمین‌شناسی رشته کوه‌های زاگرس در جهان، هدف ما مطالعه فلور دیاتومه‌های رودخانه کشکان واقع در رشته کوه‌های زاگرس می‌باشد.در این مطالعه 48 نمونه اپی‌پل و اپی‌لیت در طول رودخانه کشکان در فصل بهار در سال 1398 جمع‌آوری شد. در مجموع 91 تاکسون شناسایی شد که از میان آنها، چهار گونه به‌عنوان رکورد جدید برای فلور دیاتومه ایران تشخیص داده شدند. شناسایی مقدماتی ده گونه نشان می‌دهد که آنها احتمالا رکوردهای جدیدی برای فلور ایران هستند و به‌صورت cf. در لیست مشخص شده‌اند. هم چنین بیست گونه ناشناخته  که به‌صورت sp. نشان داده شده‌اند، می‌توانند بالقوه گونه‌های جدید باشند. این گزارش‌های جدید اهمیت این مطالعه را دو چندان می‌کند. این پژوهش، اطلاعات پایه در خصوص شناسایی و تنوع دیاتومه‌ها در منطقه زاگرس به شمار می‌آید.

Keywords [Persian]

  • Zagros Mountains
  • Diatom
  • biodiversity
  • Kashkan River
  • Iran
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