بررسی الگوی تجمع زیستی فلزات سنگین در بافت نرم اویستر صخره‌ای (Saccostrea cucullata) در سواحل شمالی دریای مکران

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه زیست شناسی دریا، دانشکده علوم دریایی، دانشگاه دریانوردی و علوم دریایی چابهار، چابهار، ایران

چکیده

استفاده از دوکفه ­ای‌ها به ­عنوان گونه‌های شاخص زیستی جهت ارزیابی آلودگی‌های محیط زیست دریایی همواره مورد توجه محققین بوده است. در این تحقیق میزان تجمع فلزات سنگین مس، نیکل و کادمیوم در بافت نرم اویستر صخره‌ای (Saccostrea cucullata) در طی دو فصل پاییز 1399 و بهار 1400 در ۴ ایستگاه گواتر، بریس، رمین و تیس در سواحل شمالی دریای مکران مورد بررسی قرار گرفت. پس از نمونه­ برداری و جدا نمودن بافت نرم طبق دستورالعمل‌های استاندارد، رطوبت ­گیری، توزین و هضم شیمیایی شد و غلظت فلزات به ­کمک دستگاه جذب اتمی 220­Varian Spectr AA تعیین گردید. طبق نتایج، در هر دو فصل پاییز و بهار الگوی تجمع به صورت مس< نیکل< کادمیوم بوده و بین فصول، اختلاف معنی ­داری مشاهده شد (0/05>p). در فصل پاییز در بین ایستگاه‌ها، بالاترین مقادیر برای فلز مس اسکله گواتر (61/42±268/48)، نیکل اسکله رمین (0/75±9/06) و کادمیوم اسکله تیس (0/09±0/182 میکروگرم بر گرم وزن خشک) و در فصل بهار، برای فلز مس رمین (49/19±229/82) برای فلز نیکل گواتر (4/21±14/72) و برای فلز کادمیوم  (0/002±0/095 میکروگرم بر گرم وزن خشک) در تیس ثبت گردید. میان ایستگاه‌ها از نظر غلظت فلزات در هر فصل اختلاف معنی‌داری مشاهده شد (0/05>p). فلز مس به ­دلیل ضروری بودن، همواره بالاترین میزان تجمع در بافت نرم را داشته است. در مقایسه با استاندارد جهانی FAO تنها فلز نیکل غلظت بالاتری داشت که با توجه به عدم وجود صنایع مرتبط در منطقه مورد مطالعه، منشاء طبیعی می‌تواند عامل اصلی آن باشد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Study of the bioaccumulation pattern of heavy metals in the soft tissue of rocky oyster (Saccostrea cucullata) on the northern coast of Makoran sea

نویسندگان [English]

  • Yasaman Firoozkuhi
  • Mehran Loghmnai
Marine Biology Department, Marine Science Faculty, Chabahar Mritime University, Chabahar, Iran
چکیده [English]

The use of bivalves as bioindicator species to assess marine environmental pollution has always been of interest to researchers. In this study, the accumulation of heavy metals of copper, nickel and cadmium in the soft tissue of rocky oyster (Saccostrea cucullata) during the two seasons of autumn 2020 and spring 2021 in 4 stations of Gowatr, Beris, Ramin and Tis on the northern shores of Makoran Sea was investigated. After sampling and separating of soft tissue, according to standard instructions, it was dried, weighed and chemically digested, and the concentration of metals was determined by atomic absorption spectrometry. According to the results, in both autumn and spring, the accumulation pattern was copper
Conclusion: Compared to international standard FAO, nickel metal had a higher concentration, which due to the lack of related industries in the study area, the natural origin can be the main reason for its existence

کلیدواژه‌ها [English]

  • Rocky oyster
  • Heavy metals
  • Saccostrea cucullata
  • Makoran

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فصلنامه محیط زیست جانوری
دوره 14، شماره 1
شماره بهار
اردیبهشت 1401
صفحه 365-372

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