Rio San Pedro sediment + 1g CaSO4
For the preparation of our column we take a bottle and use the Rio San
Pedro mud as the sediment and we added 1 grams of CaSO4 to the
bottle. We add some water too to recreate aquatic conditions. We close it and
put it in a box so the light couldn’t penetrate through. That will allow the
growth of chemosynthetic organisms in the column.
We suppose that in the top of the column aerobic organisms will grow as
the concentration of the oxygen is higher, while in the bottom of the column
the conditions will be the opposite, so anaerobic organisms will grow.
Another hypothesis is that in the deeper parts of the column the sulphur
will be accumulated and microorganisms able to metabolize it will proliferate,
however in the surface will be just the opposite as the concentration of the
sulphur will be very low.
With this information, we could affirm that the column will be
differenced in three zones: the aerobic zone, the microaerophilic zone and the
anaerobic zone. The addition of CaSO4 will stimulate the growth of
the microorganisms.
All very nice. But... how putting the bottle in the dark help the production of oxygen by anaerobic respiration? :-/
ReplyDeleteThat was a little mistake that we did not notice and we corrected it. Thanks ;-)
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