ارزیابی سلامت رودخانه‌های زرین گل، کبودوال و شیرآباد، استان گلستان با استفاده از شاخص‌های زیستی

نوع مقاله : مقاله کامل علمی - پژوهشی

نویسندگان

1 دانشکده شیلات، دانشگاه گنبد

2 دانشگاه گنبدکاووس، دانشکده کشاورزی و منابع طبیعی، گروه شیلات، گنبدکاووس، ایران

3 گروه علوم محیطی، دانشگاه شهید بهشتی، تهران، ایران

4 مجتمع آموزش عالی گنبد

چکیده

هدف از مطالعه حاضر ارزیابی سلامت نهرهای کبودال و شیرآباد و رودخانه زرین گل در استان گلستان با استفاده از شاخص‌های زیستی جمعیت بی‌مهرگان کفزی است. بی‌مهرگان آبزی یکی از مهم‌ترین و مفیدترین ارگانیسم‌ها در نظارت زیستی است. در این تحقیق، بر اساس موانع موجود و امکان دسترسی به رودخانه 5 ایستگاه در رودخانه کبودوال و 3 ایستگاه در رودخانه شیرآباد و تعداد 10 ایستگاه در رودخانه زرین گل تعیین گردید. جهت نمونه‌برداری از بزرگ بی‌مهرگان کفزی با استفاده از دستگاه سوربر به ابعاد 5/30 × 5/30 سانتی متر و با 3 تکرار در هر ایستگاه به صورت فصلی در یک دوره یک ساله (1397- 1398) جمع‌آوری و براساس کلیدهای شناسایی معتبر شناسایی گردید. سپس شاخص‌های تنوع زیستی آلفا ، بتا و چند متغیره ارزیابی سلامت کیفیت آب بررسی گردید. نتایج این مطالعه نشان داد که پساب مزارع پرورش ماهی تأثیر قابل توجهی بر روی کیفیت آب رودخانه داشته بطوری‌که درصد فراوانی خانواده‌های حساس به آلودگی در ایستگاه‌های بعد از مزارع پرورش ماهی کاهش یافته و باعث افزایش فراوانی خانواده‌های مقاوم شده است. نهرهای استان گلستان عموماً شرایط متوسط اکولوژیکی را تجربه کرده و به سمت شرایط ضعیف پیش می روند که با افزایش روند تخریب اکوسیستم های کنار نهر و نیز تاثیر فعالیت های کشاورزی و آبزی پروری، به نظر می رسد این شرایط را در آینده پیش رو خواهیم داشت.

کلیدواژه‌ها


عنوان مقاله [English]

Health assessment of Zarrin Gol River, Kaboudwal and Shirabad Streams in Golestan province using biological indices

نویسندگان [English]

  • Rahman Patimar 1
  • Mohammad Gholizadeh 2
  • Hossein Mostafavi 3
  • Hojatollah Jafarian 4
1 fishery department, Gonbad university
2 Gonbad Kavous University
3 Environmental science. Shahid beheshti university
4 fishery department, Gonbad unvirsity
چکیده [English]

The aim of this study was to evaluate the health of Kabudal and Shirabad Streams and Zarrin Gol River in Golestan Province using biological indices (benthic invertebrate community). Aquatic invertebrates are one of the most important and beneficial organisms in biological monitoring. In this study, based on the existing barriers and the possibility of access to the river, 5 stations in Kaboudwal Stream, 3 stations in Shirabad Stream and 10 stations in Zarrin Gol River were determined. In order to sample large benthic invertebrates using a surber sampler with dimensions of 30.5 30 30.5 cm and with 3 replications in each station seasonally in a period of one year (2018-2019) were collected and identified based on reliable identification keys. Then alpha, beta and multivariate biodiversity indices of water quality health assessment were studied. The results of this study showed that the effluent of fish farms had a significant effect on river water quality so that the percentage of pollution-sensitive families in the stations after fish farms decreased and increased the frequency of resistant families. The streams of Golestan province generally experience moderate ecological conditions and move towards poor conditions, which with the increasing trend of destruction of ecosystems along riparian zone and the impact of agricultural and aquaculture activities, it seems that we will have these conditions in the future.

کلیدواژه‌ها [English]

  • Golestan Stream
  • health assement
  • biological indicator
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