A Preliminary Study on Using Rotifera Fauna to Determine The Trophic Level of The Büyükçekmece Reservoir (İstanbul, Turkey)

Authors : Zeynep DORAK
Pages : 103-111
Doi:10.26650/ASE2019586048
View : 36 | Download : 9
Publication Date : 2019-09-16
Article Type : Research Paper
Abstract :In this study, the abundance of rotifera fauna, in the Büyükçekmece Reservoir insert ignore into journalissuearticles values(İstanbul); and some physicochemical features of the reservoir, were investigated between May 2009 and February 2010. In terms of physicochemical conditions, the trophic state of the reservoir was determined as eutrophic insert ignore into journalissuearticles values(CTSI= 57.8);. A total of 33 rotifera species were identified. Keratella cochlearis represented 40.62% of the total annual rotifera present, and was predominant. It was followed by Polyarthra vulgaris insert ignore into journalissuearticles values(10.14%);, Synchaeta oblonga insert ignore into journalissuearticles values(9.06%);, Brachionus urceolaris insert ignore into journalissuearticles values(5.58%);, Pompholyx sulcata insert ignore into journalissuearticles values(5.21%); and Epiphanes macroura insert ignore into journalissuearticles values(%4.86);, respectively. The contribution of the other rotifer species to the annual presence of rotifera was determined as being 24.52%. The dominance of these species was attributed to the eutrophic state of the reservoir, because K. cochlearis, P. vulgaris, B. urceolaris and P. sulcata are known as eutrophication indicator species, due to their saprobic valences. Also, the trophic state of the reservoir was found to be eutrophic according to the QB/T index insert ignore into journalissuearticles values(= 3);. According to the present data about rotifera species, and the abundance of them, the Büyükçekmece Reservoir was specified as eutrophic. However it is necessary to follow the conditions with periodic monitoring to observe the alterations in the Büyükçekmece Reservoir, in this respect the results of the present study would constitute an important baseline for subsequent studies.
Keywords : Zooplankton, indicator species, seasonal distribution, water quality, eutrophication

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