Hey readers
The bottles present the same types of
microorganism, but start to take a different appearance. We will state these
changes along the way..
The
algae that were located around the surface of the water has dried up and died,
due to us modifying the water level 3 weeks ago. The snails are still alive and
coexist with a new type of green algae that has popped up. This
recently-appeared microorganism has inhabited the centre part of the soil’s
surface. We think that the reason it wasn’t visible the last time we checked
the bottles was because it takes longer to grow and reproduce itself than the
others. The white algae have grown, especially on the side where the bottle
receives direct sunlight.
- S1,
the “Sunny Side” includes a green
sulphur reducing bacteria, with a darker colour than the algae mentioned
before. We suppose it uses the air trapped in the soil to breath. The “Dark
Side” is completely orange, with a few patches of black clusters of FeS.
- S2,
the region with direct sunlight shows a considerable amount of green bacteria.
However, the other side hasn’t presented any differences from last time
- S3, the
orange zone has also extended here, taking up a larger percentage of the
luminous part of the bottle. The opposite side has turned almost completely
black.
Green sulfur bacteria usually live within an anaerobic zone where H2S is produced. Did you check the winogradsky column we have in the lab to see if they are greel sulfur bacteria or cyanobacteria?
ReplyDeleteWhat exactly is the air trapped in the soil? Where did it come from? Did you not tap the bottle while you where preparing it?
Can you remind us what you added in the columns?