10048

9278

كارشناسي ارشد

بوم شناسي آبزيان شيلاتي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده منابع طبيعي

1393

سيزده، 80ص.: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

عيسي ابراهيمي، اميدوار فرهاديان

يزدان كيواني

94/2/27

سيما فاخران، حسين مرادي

1396/09/27

كتابنامه

منابع طبيعي

مهندسي منابع طبيعي

ID9278

81 Water Quality Assessment of Zayandehrud Dam Lake by Using Bioindicators Mojgan Zare mozhgan zare @yahoo com Date of submission Department of Natural ResourcesDegree M Sc Language FarsiSupervisors Eisa Ebrahimi e ebrahimi@cc iut ac ir Omidvar Farhadian omfarhad@cc iut ac irAbstractLakes are dynamic and stable aquatic ecosystems that are very important both ecologically andeconomically Natural processes and human activities affect on the physical chemical andbiological characteristics of aquatic environments and they cause problems on water quality Generally most studies carried out on water quality was by physical and chemical methods Thesemethods show the water quality only in sampling time and they cannot predict the water qualityover time while the biological assessment is the useful method for conservation and biodiversity ofaquatic ecosystems In this study the phytoplankton zooplankton and benthos were used asindicator organisms for water quality in the Zayandehrud Dam Lake The sampling was performedfrom different stations during the spring summer autumn and winter in with a daysinterval period For water quality measurments and phytoplankton community a liter of waterwas collected by Nansen sampling bottle from the depth of m m and near the bottom at eachstation The zooplankton sampling was carried out by using a plankton net mesh size of m byvertical towing Benthos samples at each station were collected by Ekman grab cm cm Results showed that the range of temperature pH Ec dissolved oxygen NO NO and PO were C mohs cm and mg l respectively The phytoplankton community comprised of Bacillariophyceae Chlorophyceae Cyanophyceae Euglenophyceae Dinophyceae and Chrysophyceae with the density range of and cell l respectively Thezooplankton community viz Cladocera Rotifera and Copepoda with the density range of and indi m respectively The benthos community was familes of Chironomideae ind m Naididea ind m and Tubificidae indi m The shannon Wiener Simpson and Margalef diversity indices were and for thesurface area and for middle area and and for bottom area Generally based on the findings of this research on water quality phytoplankton community and esprcially the presence of genera such as Cyclotella and Dynobrion as index of oligotrophic lakes and also absent of Microsystis genus as important index ofeutrophic lakes could be concluded that the Zayandehrud Dam Lake was classify as healthy water Keywords water quality plankton benthos bioindicator biodiversity

عيسي ابراهيمي، اميدوار فرهاديان

يزدان كيواني

سيما فاخران، حسين مرادي