Effects of seasonal changes and environmental factors on bioindicator bacteria levels in Çardak Lagoon, Çanakkale Strait, Turkey

Abstract Çardak Lagoon is one of the most important marine environments in Turkish Strait system, which home to a variety organisms. The lagoon currently under stress and faces risk heavy pollution. For this reason, present state was monitored study. During sampling from October 2018 June 2019, levels indicator microorganisms fluctuated up 4.04 Log 10 cfu 100 ml −1 their presence found be higher warmer seasons. highest positive correlations were observed for total coliform with salinity chemical oxygen demand, whereas negative between fecal coliforms, pH temperature. E. coli streptococci showed moderate environmental factors all Although nitrite nitrate (NO 2 + NO 3 ) not significantly correlated bacteria levels, they at elevated levels. lowest microbiological quality summer season, situation continued into autumn season as possible result increased wastewater discharge human activities. should therefore regularly precautions taken prevent severe ecological deterioration.