بررسی سیستماتیک روزنه داران کفزی در رسوبات آب های ساحلی جزیره هرمز (خلیج فارس)

نوع مقاله : تنوع زیستی

نویسندگان

1 گروه شیلات، دانشکده علوم و فنون دریایی، واحد تهران شمال، دانشگاه آزاد اسلامی، صندوق پستی:181-19735

2 گروه منابع طبیعی، واحد سوادکوه، دانشگاه آزاد اسلامی سوادکوه، ایران

3 بخش تحقیقات علوم دامی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان اصفهان، سازمان تحقیقات،آموزش و ترویج کشاورزی، اصفهان، ایران

چکیده

هدف از انجام این پژوهش، شناسایی گونه ­ای روزنه­ داران و آگاهی از ساختار جوامع این مایوفون­ های کفزی در محدوده آب‌های ساحلی جزیره هرمز (خلیج فارس) است. نمونه­برداری طی یک ­سال (اسفند 1393تا آیان 1394) و در چهار فصل، از شش ایستگاه در ناحیه زیرکشندی پیرامون جزیره هرمز انجام شد. نمونه ­های رسوبی با استفاده از  Corer با سطح 28/26 سانتی ­مترمربع و پس از وقوع جزر از عمق یک متری جمع ­آوری گردید و پس از تثبیت (با محلول فرمالین چهاردرصد)، برای جداسازی با الک 500 میکرون و شناسایی  به آزمایشگاه منتقل شدند. در این بررسی از 27 گونه روزنه‌ دار جمع­ آوری شده، تعداد 12 گونه متعلق به 17 جنس از 14 خانواده و شش راسته بودند. گونه Ammonia beccarii در همه ایستگاه ­ها به ­طور مشخص دیده شد. هم ­چنین بیش ­ترین تنوع گونه ‌ای مربوط به جنس Quinqueloculina بوده و جنس‌های Ammonia، Elphidium، Bolivina، Quinqueloculina و Triloculina عامل ایجاد شباهت با فون روزنه‌داران سایر سواحل شمالی و جنوبی خلیج فارس بودند. نتایج نشان داد که تنوع گونه‌ها و خانواده‌های روزنه‌دار در مقایسه با سایر مناطق مورد مطالعه در خلیج فارس کم ­تر بوده است و حضور گونه‌های شاخص اکوسیستم‌های تحت استرس متعلق به دو زیرراسته Rotalina و Miliolina در محدوده مورد بررسی بیانگر احتمال وجود شرایط استرس‌زا در اکوسیستم باشد که نیازمند پایش عوامل ایجاد کننده استرس میباشد.

کلیدواژه‌ها


عنوان مقاله [English]

Foraminiferal Assemblage structure of Hormoz Island, Persian Gulf

نویسندگان [English]

  • Nargess Mooraki 1
  • babak moghaddasi 2
  • Reza Nahavandi 3
1 Department of Fisheries, Faculty of Marine Science & Technology, North Tehran Branch, Islamic Azad University, PO Box: 181-19735
2 Natural Resources, Savadkouh Branch, Islamic Azad University, Savadkouh , Iran
3 Agricultural Research and Education Center, Natural, of research, education and extension, Isfahan
چکیده [English]

The present study was conducted to identify the foraminiferan species and the assemblage structure of these benthic meiofauna in coastal waters of Hormoz Island (Persian Gulf). The species were sampled seasonally during one year (March 2014-November 2015) at six subtidal stations around Hormoz Island. Sediment samples were collected by a Van-Veen grab at depth of one meter after low tide occurrence, fixed with 4% formalin and transferred to the laboratory for isolation and identification. Of 27 foraminiferan species collected in this study, 12 species were distinguished belonging to 17 genera from 14 families and 6 orders. Ammonia beccarii was clearly observed at all stations. Also, genus Quinqueloculina displayed the highest species diversity. It was further found that the genera Ammonia, Elphidium, Bolivina, Quinqueloculina, and Triloculina were responsible for the similarity of foraminiferan fauna at other northern and southern coasts of Persian Gulf. The results showed lower diversity of foraminiferan species and families than those at other areas studied in the Persian Gulf. Moreover, the presence of indicator species for stressed ecosystems belonging to two suborders of Rotalina and Miliolina in the studied area could suggest possible stressful conditions in the ecosystem, which requires monitoring the stressor factors. 

کلیدواژه‌ها [English]

  • Foraminifera
  • Meiofauna
  • Persian Gulf
  • Hormoz Island
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