Burç göleti fitoplankton kompozisyonu ve ekolojik özellikleri

In this study, it was aimed to investigate the existence of phytoplankton composition and related physicochemical changes in Burç Reservoir. The samples were monthly taken from three stations in Burç Reservoir between September 2018 and August 2019. Annual water quality analysis helps to evaluate the impact of anthropogenic activities on the reservoir. The Reservoir water was slightly alkaline characteristics with an average pH of 8.55. A total of 136 algae taxa had been identified. Chlorophyta was the dominant group with 40 taxa. Pediastrum duplex and Cladophora glomerata in phylum Chlorophyta (29%) were the most dominant groups in terms of biovolume followed by Ulnaria biceps and Ulnaria ulna in phylum Bacillariophyta (19%) and Microcystis aueroginosa and Oscillatoria tenuis in phylum Cyanobacteria (18%) in the reservoir. The two axes of Canonical Correspondence Analysis (CCA) explained the relations between phytoplankton species and environmental factors of Burç Reservoir with 99.4% and 99.2% respectively. The cumulative variance percentage of the species data explained with 20.7. These interactions indicated that phytoplankton species were directly affected by environmental variables. The most effective explanatory factors such as electrical conductivity, salinity, N-NO3, TN, temperature, N-NO2, P-PO4, TP, etc. played significant roles (p=0.002) in the seasonality of species. Results of Carlson's Trophic State Index and OECD indicated that Burç Reservoir had eutrophic structure.