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تنوع زیستی دیاتوم های رودخانه خرمارود، استان گلستان | ||
| نشریه محیط زیست طبیعی | ||
| مقاله 1، دوره 73، شماره 4، اسفند 1399، صفحه 625-636 اصل مقاله (1.51 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jne.2021.304839.2018 | ||
| نویسندگان | ||
| عبدالکریم آق آتابای1؛ جمیله پناهی میرزاحسنلو* 2؛ فرامرز رستمی چراتی3؛ رضا اکبری4 | ||
| 1گروه زیست شناسی دانشکده علوم پایه دانشگاه گنبدکاووس | ||
| 2استادیار گروه زیست شناسی دانشکده علوم پایه دانشگاه گنبدکاووس | ||
| 3گروه شناخت مواد و تکنولوژی پژوهشکده حفاظت ومرمت آثار تاریخی-فرهنگی پژوهشگاه میراث فرهنگی و گردشگری | ||
| 4گروه شیمی دانشکده علوم پایه دانشگاه گنبدکاووس | ||
| چکیده | ||
| خرمارود از رودخانه های شهرستان آزادشهر در استان گلستان میباشد که از ارتفاعات جنوبشرقی این شهرستان سرچشمه گرفته به رودخانه گرگانرود و در نهایت دریای خزر میریزد. دیاتومها، فلور جلبکی غالب را در اکوسیستمهای آبی تشکیل میدهند و به عنوان معرف های شرایط محیطی مطرح هستند. به منظور شناسایی فلور دیاتومهای خرمارود نمونهبرداری طی تابستان و پاییز 1396 از بسترهای سنگی و رسوب انجام گرفت. در این مطالعه به طور کلی تعداد 60 گونه دیاتوم متعلق به 32 جنس و 20 تیره شناسایی شد. 59 گونه متعلق به رده Bacillariophyceae و تنها 1 گونه از رده Coscinodiscophyceaبود. بزرگترین جنس Nitzschiaبا 7 گونه بود و جنسهای Navicula و Gomphonema با 5 گونه ردههای بعدی را به خود اختصاص دادند. بیشترین فراوانیها مربوط به گونههای Achnanthidium gracillimum، Achnanthidium minutissimum، Cocconeis placentula، Cymbella affinis، Encyonopsis minuta، Gomphonema olivaceum و Nitzschia inconspicua بود. براساس نتایج شاخص های تنوع ایستگاه سوم که تحت تأثیر روانابهای استخر پرورش ماهی قرار داشت دارای تنوع گونه ای کمتر و در وضعیت شدیداً آلوده قرار داشت و بقیه ایستگاهها کمی آلوده بودند. همچنین در تمامی ایستگاهها نمونههای مربوط به رسوب تنوع بیشتری نسبت به بستر سنگی داشتند که می تواند اینطور توجیه شود که نمونه های رسوب نسبت به بستر سنگی کمتر از وضعیت شیمیایی آب تأثیر می پذیرند. | ||
| کلیدواژه‌ها | ||
| تاکسونومی؛ جلبک؛ شاخص تنوع شانون؛ فلور | ||
| عنوان مقاله [English] | ||
| Biodiversity of Diatoms in Khormarud River, Golestan Province | ||
| نویسندگان [English] | ||
| Abdolkarim AgAtabay1؛ Jamileh Panahy Mirzahasanlou2؛ Faramarz Rostami Charati3؛ Reza Akbari4 | ||
| 1Department of biology faculty of basic science Gonbad Kavous university | ||
| 2Assitant Prof. Department of Biology, Faculty of Basic Science, Gonbad Kavous University, Gonbad Kavous, Iran | ||
| 3Research Center for Conservation of Culture Relics (RCCCR), Research institute of Cultural Heritage & Tourism | ||
| 4Department of Chemistry, Faculty of Basic Science Gonbad Kavous University | ||
| چکیده [English] | ||
| Khormarud is one of the Rivers in Azadshahr County in Golestan Province, which is originates from southeast elevations and discharges to the Gorganrud River that reach to the Caspian Sea. Diatoms constitute the dominant algal flora in aquatic ecosystems. In order to identifying diatom flora of Khormarud River, specimens were collected from stony and sediment substrates during summer and autumn of 2017. In total, 60 species belong to 32 genera and 20 families were identified, from which 59 species were belonging to class Bacillariophyceae and only one species to class Coscinodiscophyceae. Nitzschia with 7 species were the most species rich genus and Navicula and Gomphonema with 5 sp. were in the next order. The most abundant taxa were Achnanthidium gracillimum, Achnanthidium nanum, Cocconeis placentula, Cymbella affinis, Encyonopsis minuta, Gomphonema olivaceum and Nitzschia inconspicua. According to the results of diversity indices, site 3 which affected by runoff from fishery activities, had lowest species diversity and high pollution level. In total epipelic samples in all sites had high diversity than epilithic samples which could explain by the fact that algae on sediments are affected weakly by water column chemistry than epilithic algae. | ||
| کلیدواژه‌ها [English] | ||
| Taxonomy, Algae, Shannon diversity index, Flora | ||
| مراجع | ||
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