As we have become fond of our microorganisms, we
decided to keep both bottles in sunlight, so the light-dependant microorganisms
don’t die.
We can differentiate three parts in the column:
• The first zone consists of the water area and the
soil’s surface. The white algae has colonized the entire surface and grown in
height. The snails still coexist happily with them
• The second zone, which is the combination of the
previous S1 and S2 zones (as they have practically merged together), has a
greenish colour on the “Sunny Side”. The population of green bacteria has grown
exponentially, possibly because the nutrients it feeds on are excreted as waste
from surrounding microorganisms. We also consider this area as a production zone
for nutrients for the column, as the green bacteria and algae perform
photosynthesis. This allows the organisms found in the zone immediately above to
use the oxygen produced. The orange area has remained stable.
• The S3 part has become darker, as all the oxygen
that might of have been trapped there has finally disappeared, giving way to a
complete anaerobic environment. Here, bacteria that produce FeS can thrive (as
long as they don’t receive any direct sunlight).
No comments:
Post a Comment