Investigation of temporal changes of phytoplankton in Karşıyaka yacht port (İzmir inner bay)

ABSTRACTINVESTIGATION OF TEMPORAL CHANGES OF PHYTOPLANKTON IN KARŞIYAKA YACHTPORT (IZMIR INNER BAY)Serkan KÜKRERThe main aim of this research is to investigate temporal changes of phytoplankton compositionand physicochemical environment parameters in İzmir Bay, Karşıyaka Yacht Port (38° 26' 92'' N ve 27°06' 47'' E) between the years of 2003 and 2004. for this reason surface water samples are collectedweekly at the depth of 0.5 meter at the same time of each day.Minimum and maximum values of physicochemical parameters of collected water samples aremeasured as respectively following : ammonium 0,06 µg at N/l-40.72 µg at N/l, nitrate 0.191 µg at N/l-24.86 µg at N/l, nitrite (under detected limit)-25.9 µg at N/l, phosphate 0.87 µg at P/l-17.58 µg at P/l,silicate 0.78 µg at Si/l-48.6 µg at Si/l, dissolved oxygen 4.51 mg/l-12.7 mg/l, sea water temperature 8.8C°-27.6 C°, chlorophyll-a 0.004 µg/l-3.93 µg/l, pH, 7.46-8.45, salinity %o 35.97-%o42.85, secchi depth1 meter-7 meter.The collected data will be basis for the comparison of environmental situations in KarşıyakaYacht Port after and before running İzmir waste water Treatment Project with full capasity.The main classes found in the investigation field are Bacillariophyceae, Dinophyceaea,Euglenophyceae, Dictyochophyceae and Ciliata.Considering the phytoplankton composition, Bacillariophyceae and Dinophyceae are dominantto the other classes with respect to species and individual number. While tehere are no greatdifferences between these two dominant classes with respect to species number, it can be said thatdiatoms are superior with respect to cell number.Diatoms and dinoflagellats that are relatively in few numbers in January and Februarydrastically increase their numbers starting from March and reach at their maximum levels from springto mid- summer.