Food Web Game and Ecological Sampling Lab Guide
Autor: Jannisthomas • September 28, 2017 • 1,774 Words (8 Pages) • 1,198 Views
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Checklist
Bring proper lab attire
Complete the worksheet and answer all associated questions
Complete the discussion question online
All students are required to complete the virtual lab external and internal anatomy tutorial prior to lab next week: http://www.mhhe.com/biosci/genbio/virtual_labs/BL_14/BL_14.html
Name: ______________________________
Section: ____________________________
I. Food Web Game – Take My Energy, Maybe Worksheet
Energy Table
Organisms
Total Energy Start
Total Energy Round 1
Total Energy Round 2
Total Energy Round 3
Total Energy Round 4
Cougar (1)
44
36
40
44
48
Raccoon (1)
30
32
36
38
33
Snake (3)
24 – 72 (48)
50
46
48
47
Mouse (5)
16 – 80
84
76
68
64
Sunflower (10)
10 – 100 (90)
80
89
93
97
plus Energy gained by photosynthesis
1/sunflower/round
n/a
9
9
9
9
∑ Energy (16)
maximum 346
291
296
300
298
minus Energy lost to heat
n/a
-85
-85
-85
-85
∑ Final Energy
Totals
Maximum 346
206
211
215
213
Questions:
- Which organisms had an overall increase in energy points?
The cougar, raccoon, and sunflowers had an overall increase in energy points.
- Which organisms had the most decrease in total energy points?
The organism that had the most decrease in total energy was the mouse. Then came the snake. But the snakes did not lose as much energy.
- Why did we have more sunflowers than mice and more mice than snakes?
We need to maintain the balance of the food chain. If you have too many consumers, they would eat all of the population. We need to have more producers/ plants. If we had more snakes than mice then we would never have any mice to survive. There are more sunflowers than mice to feed mice and other organism and still have sunflowers to thrive. Sunflowers and mice reproduce quicker so there are more of these types of animals.
Name: ______________________________
Section: ____________________________
- Do you think this was a realistic exercise in how a food chain operates? Why or why not?
This is a realistic exercise of how a food chain operates. Their energy can decrease or increase when they cross paths with other animals or plants. If a mouse encounters a cat, it has to run fast and away from the predator so it loses energy but the cat if it catches the mouse will gain energy.
- If you could adjust this game to make it more realistic, how would you change it?
I would add another cougar, a raccoon, parasites, and also decomposers. Also I would make it possible for some animals to be able to get away from their predators.
- If you wanted to add decomposers to this game, what would you need to do?
I would need to die in order for the decomposers to be able to do anything. There would have to be dead but not consumed organisms. Like for example if there were to be a drought or a disease going around where the animals just died, the decomposers would eat the dead bodies.
II. Counting Beans – Ecological Sampling Technique
Mark-Recapture Data
Beans (animals) marked and “released” (M) = 113
Total number of beans (animals) recaptured (S) = 124
Number of marked beans (animals) recaptured (R) = 28
Lincoln-Peterson
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