اثر تجمع فیتوپلانکتون‌ها بر کیفیت آب سد کرج

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استادیار گروه علوم محیط زیست، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران

2 استاد گروه مدیریت محیط زیست، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران

3 کارشناس ارشد مدیریت محیط زیست، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران

چکیده

فیتوپلانکتون‌ها اهمیت زیادی در کنترل وضعیت اکو سیستم‌های آب دارند. هدف از این مطالعه، بررسی وجود رابطه بین تراکم فیتوپلانکتون‌ها و مواد مغذی به‌ویژه نیترات و فسفات و سایر عوامل مؤثر بود. بر این اساس، دریاچه سد کرج به‌عنوان مطالعه موردی در نظر گرفته شد. به این منظور، یک سال نمونه‌برداری از دریاچه سد کرج صورت گرفت و عوامل فیزیکی، شیمیایی و بیولوژیکی آن اندازه‌گیری شدند. میزان نفوذ نور خورشید در عمق آب، با استفاده از دیسک سشی اندازه‌گیری شد. در این مطالعه مشخص گردید که دریاچه سد کرج دارای لایه‌بندی حرارتی است. این دریاچه در ماههای گرم سال دارای تراکم زیست توده جلبکی بوده و همچنین تعداد فیتوپلانکتون‌ها با افزایش عمق تغییر می‌یابند. بیشترین تعداد فیتوپلانکتون در سال 1389 مربوط به دیاتومه به‌ویژه سیکلوتلا بود. بررسی تعداد فیتوپلانکتون‌ها با عوامل شیمیایی نشان داد ارتباطی بین کاهش و افزایش میزان آنها و تعداد فیتوپلانکتون‌ها وجود ندارد.

کلیدواژه‌ها


عنوان مقاله [English]

Phytoplankton Assembly Effect in Karaj Reservoir Water Quality

نویسندگان [English]

  • Seyyed Masoud Monavvari 1
  • Jafar Noori 2
  • nooshin Sohrabnia 3
چکیده [English]

Phytoplankton plays a major role in monitoring aquatic ecosystems. The purpose of this study was to investigate the relationship between the density of phytoplankton and the nutrients, especially nitrates and phosphates and other effective parameters in Karaj dam as a case study. For this purpose, in 2010, Karaj dam was sampled during a year and physical, chemical and biological factors were measured. The penetration depth of sunlight into the water, was measured using Sechei disk. The results of this study demonstrated that there is a   thermal stratification in Karaj reservoir. The density of phytoplankton in this lake increased in hot weather of the year and it also varies as the depth increases. In 2010, the most population in phytoplankton community of the lake was formed by Diatoma and specially Cyclotella. No relationship was found between the number of phytoplankton and the amount of chemical factors in this study.

کلیدواژه‌ها [English]

  • Karaj Dam
  • Thermal stratification
  • Water Quality
  • phytoplankton
  • Diatoma

 

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