Assessment of the ecological and trophic status of Lake Bafa (Turkey) based on phytoplankton

Phytoplankton groups are one of the major quality element to be used in evaluation trophic and ecological state freshwater ecosystems according EU Water Framework Directive. This research was made assess status Lake Bafa Turkey, on basis phytoplankton communities. Büyük Menderes River is most important factor that carries pollutants Bafa. The eight sampling station were assigned evaluate lake. species collected monthly for 2 years study period. Most commonly phtoplankton indices Q index Carlson’s Trophic State Index (TSI), different versions diversity estimate Similarities between stations clustured by using unweighted pair group method arithmetic average (UPGMA), based Correlations applied determined Pearson Correlation. After identification phytoplanktons, total 63 taxa which belong classis Cyanophyceae (11.2%), Bacillariophyceae (49.2%), Chlorophyceae (23.8%), Xanthophyceae (1.5%), Euglenophyceae (11.2%) Dinophyceae (3.1%) detected. 1st 2nd similar each other (88%) Secchi disc depth (SD) TP played an role distribution highest significant positive correlation TSI (r = 0.987, p˂0.01). Considering TDI values composition lake, it can said although productivity studied lake still “mesotrophic”, has a tendency towards “eutrophic” state. According values, first five reflect moderate state, while 6th, 7th 8th represent poor