The respiratory activity of bacteriobenthos in coastal and deep-water areas of northwestern part of the Black Sea
The ratio of potential and real consumption of oxygen as well as numbers of aerobic and anaerobic heterotrophic bacteria in northwestern part of Black Sea sediments with different redox conditions and the depths of the bottom are investigated. Increase concentrations of methane, sulfide ion, and as a result, the absorption of oxygen in the first half of the daylight hours was found. As shown by calculation the rate of aerobic oxidation of organic matter was 0.68 mkg.g-1 in hour. It in aggregate with needs of the assimilation amounts to about± 0.1 mkg.g-1. Growth of biomass was about 1.0 mkg.g-1. A rate produced of oxygen at a depth of 4 m in the nearbottom layer through photosynthesis was 140 - 200 mkgO2 dmin hour. Bottom sediments that vary in content ofoxygen were nevertheless it close in rate of aerobic oxygen utilization and by number of oxiphylic microflora. Thehumidity and the specific gravity of sediments for capability of conversion and comparison of data is advisable indicate.