Winogradsky column- Day 89
Group 7B (Lucas Garín Ortega and Alba Mejías Gallardo)
Group 8B (Laura Lucena del Amo and Noelia Moares Fernández)
The last time we visited
our columns, the one made by group 8B, wich was kept in the light, had the
following microorganisms:
·
At the bottom of
the column, there was a black layer wich means that there are anaerobic
microorganisms that breath with sulphate. The bubbles in thar área, are from H2S,
and they are dur to thet breathing.
·
Also, there was a
few orange layers wich means that photoeterooganotrophs had been proliferated.
The main diference
between the last time we visited our column and this is that there are more
orange layers and they are bigger.
After a few weeks we visited our column, the one made
by group 7B, for the last time and observed the following:
· The water that remains on the surface is still clear, so aerobic microorganisms
have not proliferated
· The clear layer previously found in the middle of our column has decreased.
The bottom of the column has become a lighter color, and around this change,
numerous cracks are found due to gases. These are due to the respiration of the
microorganisms that are proliferating.
· Finally, the orange layer appreciated on the surface has increased.
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