برآورد شاخص زیستی و کیفیت آب رودخانه کر در فصل پاییز با استفاده از فون حشرات آبزی
محورهای موضوعی : گیاه پزشکی
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کلید واژه: Water Quality, رودخانه کر, کیفیت آب, Biotic Index, Aquatic Insects, Kor River, شاخص زیستی, حشرات آبزی,
چکیده مقاله :
گونه های مختلف بی مهرگان بزرگ از جمله حشرات که در کف آبها زندگی می کنند از نظر حساسیتشان به فاکتورهای زنده و غیرزنده متفاوت عمل می کنند. فناوری به کارگیری جمعیت حشرات آبزی برای نشان دادن درجه آلودگی توده آب های مختلف بیش از نیم قرن است که وجود دارد و این موضوع بر اساس توانمندی های زیستی موجودات زنده ای که به عنوان شاخص آلودگی و سطوح مختلف آن بکار می روند بنا شده است. در پاییز 1387 تحقیقی به منظور برآورد شاخص زیستی رودخانه کر با بکارگیری فون حشرات آبزی صورت گرفت که در مجموع 16 خانواده حشره از 14 کد زیستگاهی رودخانه جمع آوری و شناسایی شدند و شاخص زیستی این رودخانه محاسبه گردید. در تحقیق صورت گرفته بر روی رودخانه کر، شاخص زیستی این رودخانه در فصل پاییز عدد 2/7 بدست آمد که با استفاده از جدول مربوط به برآورد کیفیت آب براساس شاخص زیستی، کیفیت آب این رودخانه در فصل پاییز نسبتاً نامرغوب و آلودگی آب به مواد آلی معنی دار بود.
Benthic macroinvertebrate species are differentially sensitive to many biotic and abiotic factors in their environment. The field biotic index is based on family level identification of water arthropods. An interest in environmental quality is one of the major reasons for the study of aquatic insects. The idea of using the aquatic insect community to “indicate” the degree of purity or pollution of a body of water is over half a century old. It is based on the concept of indicator organisms and tolerance levels. During October, November and Dececember 2008 studies were carried out on the field biotic index of Kor river in Marvdasht region (Fars province) using aquatic insects fauna. A total of 16 families were collected and identified in 14 habitat codes of Kor river. In this survey, biotic index of KorRiver was 7.2 and evaluation of the water quality based on the biotic index was calculated. Water quality of Kor river was fairly poor (significant organic pollution) during this survey.
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