ارزیابی کارایی شاخص‏های زیستی یگانه و چندگانۀ بزرگ بی‏مهرگان کفزی برای تعیین کیفیت آب (مطالعۀ موردی رودخانۀ جاجرود)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه شهید بهشتی -پژوهشکده علوم محیطی

2 دانشیار گروه تنوع زیستی و مدیریت اکوسیستم‏ها، پژوهشکدۀ علوم محیطی، دانشگاه شهید بهشتی

3 استادیار گروه آلاینده‏های محیط زیست، پژوهشکدۀ علوم محیطی، دانشگاه شهید بهشتی

چکیده

بزرگ بی‏مهرگان کفزی، شاخص‏های سودمندی برای ارزیابی تأثیرات آشفتگی‏ها بر حوضۀ آبخیز و رودخانه هستند زیرا آن‏ها بسیاری از فرایند‏های اکولوژیکی را در مقیاس حوضۀ آبخیز یکپارچه می‏کنند. در این پژوهش کاربرد شاخص‏های زیستی ماکروبنتوز یگانه و مولتی‏متریک برای ارزیابی زیستی رودخانۀ جاجرود بررسی شده است. به این منظور از شش ایستگاه مطالعاتی طی چهار فصل نمونه‏های آب و بزرگ بی‏مهرگان کفزی جمع‏آوری شد. نتایج نشان داد Chironomidae بیشترین فراوانی نسبی را در منطقۀ مطالعاتی دارد و شاخص‏های زیستی هیلسنهوف و BMWP/ASPT برای ارزیابی کیفیت آب رودخانۀ جاجرود مناسب‌اند. برای کاربرد شاخص‏های مولتی‏متریک نیاز است با توجه به شرایط جغرافیایی و فیزیکوشیمیایی رودخانه‏های ایران، سازگاری و کالیبراسیون لازم انجام گیرد. نتایج ترکیبی از شاخص‏های زیستی نشان داد ایستگاه‏های واقع در مناطق مسکونی نسبت به ایستگاه‏های بالادست آلودگی بیشتری دارند و کنترل و مدیریت منابع آلاینده برای حفاظت از منطقۀ مطالعه‌شده لازم است.

کلیدواژه‌ها

عنوان مقاله [English]

Evaluation of single- and multi-metric benthic macroinvertebrate indices for water quality monitoring, case study Jajrood River

نویسندگان [English]

  • Zeynab Shirchi Sasi 1
  • Asghar Abdoli 2
  • Hossein Hashemi 3

1 Masters of Environmental Engineering, Environmental Science Institue, Shahid Beheshti University

2 Associate Professor, Department of biodiversity and Ecosystem Management, Environmental Science Institue, Shahid Beheshti University

3 Assisstant professor, Department of Environmental Pollutant, Environmental Science Institue, Shahid Beheshti University

چکیده [English]

Benthic macroinvertebrates in river are useful indicators for adverse impacts on the catchment and river ecosystems. These organisms integrate many ecological processes in catchment scale. In this study several single and multi metric biotic indices were used based on macroinvertebrates in order to evaluate the water quality of Jajrood river. Macroinvertebrates as well as water samples were collected in six stations seasonally. The results showed that the Chironomidae family had the most relative abundance and Hilsenhoff biotic index and BMWP/ASPT are most appropriate biotic indices for evaluation of Jajrood River water quality. The adjustment and calibration ofindicesbased on geographical condition as well as physiochemical parameters of Iran rivers is required in order to apply the multimetric index.The result of various biotic indices showed that stations located in the residential areas compared to the stations located in the upstream were more polluted.

کلیدواژه‌ها [English]

  • Benthic Macroinvertebrate
  • Biological assessment
  • Multimetric Index
  • Jajrood River
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