Rio San Pedro sediment + filter paper
Day 49
Hello
there,
Since the
last post a lot of time has passed by, so that the development of one bottle is
considerable advanced. The `darkness bottle´ presents almost the same aspect,
it´s means that black zones, caused by sulphate-reducing bacteria, have spread
to more areas of the sediment.
Meanwhile,
the `light bottle´ has undergone a growth of new life. In the bright side,
cianobacteria have appeared all over this wall, as well as in the superface.
Due to these photosynthetic microorganisms, it shows green coloration and O2
realising. At the bottom of the bottle, where most sulphate-reducing bacteria
develop, new living microorganism have grown up too: sulphate green bacteria
have appeared causing green coloration (as they are photolitoautotrophic) and sulphate
reddish bacteria have allowed to observe red small zones. The limits between
the light and shadow side of this bottle continue to differentiate through
reddish lines of oxidation.
 |
| Comparision between darkness (right) and light (left) column. |
This is our light column development:
 |
| Light side |
 |
| Comparision between shadow and light sides |
 |
| Sulphate green bacteria and sulphate red bacteria |
 |
| Cianobacteria and O2 realising in `light bottle´ |
We'll come back soon!!
No comments:
Post a Comment