Winoblog, Second post, group B7.

            In this second post, we can appreciate a change in the colour of our “Winogradsky column”. The methane wall cavity has been deleted, because organic substance’s excess was consumed. Besides, is possible to see muddy water. 

            In addition, a rosy colour appears, because a microorganism like Chromatium uses CO₂ and H₂S to create organic molecules. On top of rosy stratum, we can see other stratum more light where we find Rhodomicrobium. Rhodomicrobium uses CO₂ and organic acids to produce organic molecules.

             Finally, at the beginning of Winogradsky column, there is a space that has oxygen. This oxygen is utilized for filamentous microorganism like Beggiatoa, it produces sulfuric acid and organic molecules. Besides that, on wáter, photosynthetic mirobes make their work.

Figure 1: A rosy stratum.

Figure 2: Photo taken 31st March.

Figure 3: Space with oxygen.