Seasonal variation in Planktonic Microcrustacea (Copepoda, Cladocera) Diversity in Kadik？y Reservoir (Edirne/Turkey)

Abstract This study was carried out to determine the diversity, abundance and seasonal distribution of microcrustacea (Cladocera, Copepoda) in Kad？k？y Reservoir. For this purpose, microcrustacea and water samples was taken at monthly internals from March 2010 to February 2011 in three different stations from the reservoir. As a result of qualitative and quantitative analyses of the samples, a total of 27 taxa, 19 taxa from Cladocera and 8 taxa from Copepoda were identified. The quantitative evaluation of the samples revealed an average value of 51463 ind/m3 in the reservoir. The annual average values according to the groups were 33766 ind/m3 (66%) for Cladocera and 17697 ind/m3 (34%) for Copepoda. According to the water quality standards, the temperature, pH, nitrate nitrogen, sulphate and phosphate were found at first and second quality levels. In terms of dissolved oxygen the water was found at first quality level, nitrite nitrogen was found between second and third quality levels. Microcrustacea fauna and physicochemical parameters were evaluated together and the reservoir was concluded to be a meso-eutrophic water bod