Alexandra's Bacteria & Fungi Page

Alexandra's Bacteria & Fungi Page

Bacteria & Fungi

   

For this experiment I opened my plate for about 15 min in my bedroom with the room temperature (75-77 F). Then I kept it for 15 days with different amount of sun but with the same temperature. Two chart below will show experiment results. 

Result 1. Total Amount of Colonies Over 15 Days

 DAYNUMBER OF COLONIES
 1 0
 2 0
 3  4
 4 7
 5 7
 6 7
 7 10
 8 74
 9 75
 10 84
 11 73
 12 67
 13 58
 14 33
 15 33
Figure 1. Graph of Table 1



Results 2: Individual Colony Growth

  Type 1
(Black)
 Type 2
(DarkGreen/white)
 Type 3
(White)
 Type 4
(Yellow)
Day 1 
 0 0 0 0
 Day 2
  0 0 0 0
 Day 3
 0 2 2 0
 Day 4
 0 4 3 0
 Day 5
 0 4 3 0
 Day 6
 0 4 3 0
 Day 7
 0 6 3 1
 Day 8
 0 69 4 1
 Day 9
 2 68 4 1
 Day 10
 22 58 3 1
 Day 11
 33 36 3 1
 Day 12
 28 35 3 1
 Day 13
 25 28 2 3
 Day 14
 13 16 2 2
 Day 15
 16 14 1 2
Figure 2. Graph of Table 2



Conclusion:

For first three days my Bacteria plate did not show any results.First colony to appear was Dark Brown(Type 2,Day 3) that took most of the area in the plate and white (Type 3) that did not change its amount for the rest of the experiment. (Shown in the Graph №2).The most highest amount of colonies was at 10th day. Than its started to go down by increasing surface area of different bacterias.My hypothesize is that agar reached it carrying capacity and could not produce more colonies and all the nutrients in the agar were already absorbed.Also some bacterias had changed their condition to another types. For example some of my Dark Brown bacterias changed their colors to dark one after few days of appearing.

If I would continued my experiment for another month nothing would actually be changed because my agar already reached maximum capacity  


What I learned

From this experiment I have learned more about carrying capacity theory. That it can be used not only with huge species such as humans,animals but also with small species as a bacterias. 
Also I learned that different Bacterias can be grown in the same environment with the same area. They create their own colonies that are getting more bigger and they have their own competition for nutrients and for survival.
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