Seasonal variations of the microflora of wedge clam Donax trunculus (Linnaeus, 1758) from the region of Arkutino (Bulgarian Black Sea aquatory)

The main goal of the present study was to investigate impact state environment on microbiota wedge clam Donax trunculus (Linnaeus, 1758) from region Arkutino (Bulgarian Black Sea aquatory). species Enterococcus hirae isolated during summer (from May August). P. mendocina prefers warmer months and alcaligenes colder ones. temperature followed a course decrease period September 2020 January 2021, by slow increase February 2021. Comparing with it became evident that in 2021 1.5 °C lower. We can say number twice as high It is likely this preferred lower optimum temperatures constant other parameters. For such dependence not observed - remained May, but increasing microorganisms decreased months. seemed preferably develop at pH 7.78. A. gyllenbergii grows between 20.3–25.7 optimal 25.7 °C. C. farmeri conditions were 26.2 7.3. E. vulneris probably related only water temperature, also anthropogenic factor, found July.