In total, I found 7 different kinds of bacteria in the columns. (2)
-In the Controlled Column, I found Cyanobacteria (5) along the top of the column. This bacteria causes the lighter green/blue colour near the top of the column. The reason that it is at the top is because this bacteria photosynthesises using the sun. The side facing the window(the sun) has more of a green colour because the bacteria requires the sun in order to survive. …show more content…
There are two types of succession. The first one is called Primary Succession and it is the introduction of a new habitat that hasn’t been colonized in the ecosystem. The second one is called Secondary Succession and it is the changes that occur upon already colonized habitats that are disturbed by damage. An example of Secondary could be a forest fire. (10)
Not all types of bacteria appeared at the same time. The starting environment of each column allowed a specific type of bacteria to begin growing. This bacteria caused a sort of ripple effect as it was the cause of other bacteria to also begin to grow.
The chemical hydrogen sulfide produces a smell like rotten eggs. (9) The bacteria that gives off a smell like this is the Sulfate-Reducing bacteria. This makes sense because the Sulfate-Reducing bacteria is only found in the columns that contain Sulphur and those are the three darkest columns out of the five. This is why when those three columns are opened up, they are the only ones that will give off the rotten egg …show more content…
As three out of the five columns contain Sulphur, there is a large amount of bacteria that is only available in these three columns. Bacteria such as Sulfate-Reducers can only live in an environment with sulphur because they breathe sulfate and nothing else. Sulfate-Reducers are very strong bacteria that are filling up most of the columns with added sulphur. The Sulfate-Reducers in the C+S Dark column is so strong that it makes the entire column anaerobic showing how much sulphur can contribute. Another bacteria that is only available with sulphur is Chromatiaceae. Chromatiaceae gives off the red colour in the columns and it is also known as the Purple Sulphur Bacteria. They only use hydrogen sulfide to survive. Also, the sulphur brings out Beggiatoa which is a bacteria that is only available in a sulphur-rich environment. Many of the bacteria seen in the columns were only possible because of the added sulphur.
-In the C+S columns, there is a mix of a sulphur environment and a natural environment (made by the carbon). However, the sulphur is a very toxic substance which can overpower the carbon. That is why a lot of the columns that include both are mostly black because of the Sulfate-Reducers. However, in the C+S Light column, the carbon creates enough of a natural environment to allow photosynthesis to occur at the top of the column. This is why Cyanobacteria