ISAVELLA
ZACHARIADI
MARIA
MASMANIDOU
UNIVERSITY OF IOANNINA
Our
experiment took place in Vrellis Lake of Ioannina on 21.10.2016 at 13:00
o’clock.
We used
two plastic bottles (1,5L), a funnel, sediment from the lake (mud), a sheet of
newspaper, two whole eggs (with the pod) and water from the lake. After mixing
the sediment with the enrichment materials, we filled the ¾ of the first bottle
and then we added water from the lake. In the second one we filled the ¼ of the
bottle with the sediment and the enrichment materials and the other 2/4 without
them (just the sediment from the lake). After that we added water from the lake
till the top of the bottle. We left the bottle in a calm situation to
precipitate our sample and then we placed it in a spot with light
during the entire day and stable temperature.
We are
expecting that microorganisms in the first bottle will grow up faster than the
second one because they have access in more nutritional ingredients (we provide them more carbon(newspaper) and sulphur(eggs)
source), or otherwise we will notice that so much quantity of nutritional
ingredients is a negative growth regulator.
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Left one: bottle with ¾ sediment-enrichment materials and lake water
Right one: bottle with ¼ sediment-enrichment materials, 2/4 sediment and lake water
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