| Popis: |
The physical and chemical characteristics (salinity, temperature, pH) in algae mats of hypersaline Sivash Bay (Crimea) were studied. They were formed in the coastal waters of the bay and influence alive community condition. A significant tendence of the pH increase in the direction of shore-clear water was noted. This represents an improvement of oxygen conditions in the said direction. Heterotrophic and denitrifying bacteria had been isolated ubiquitously. The presence of a significant negative correlation between pH of th e water and the number of heterotrophic bacteria was noted. A slight negative correlation between pH of the water and the number of denitrifying bacteria was determined. Thus, there was a tendency for the inhibition of these bacteria groups’ growth by high pH. Salinity, in the range of its change (60.8–94.5 ‰), hadn’t a significant effect on the abundance of the studied groups of bacteria. In the detected range of temperature (23 –32 ˚С), it was impossible to assert the presence of a close relationship betwe en these parameters. In algal mats, there was a community of poor diversity. The macrocomponents were represented by Artemia salina (Linnaeus, 1758) and larvae of Chironomidae sp. Salinity in the studied range of values hadn’t affected the abundance and biomass of the components of the macrozoocommunity significantly. At the same time, a positive effect of changes in water pH on the abundance and biomass of A. salina was noted. This phenomenon for the larvae of Chironomidae sp. not fixed. |
