05 Mar Lab 8 Answer Sheet – Ecology
Lab 8 Answer Sheet – Ecology
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Name |
Course |
Date |
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BIOL 103 |
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Activity Data Code FORMTEXT
FFFFFFFF00000000140006005400650078007400340035000000000000000000000000000000000000000000000000000000
Procedure I – Mushroom Yield – Nitrate Concentration
Complete the table below using your data and information found under the Background tab.
Table 1
|
Trial |
Nitrate Concentration Level (ppm) |
Mushroom Yield (Number of Mushrooms) |
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1 |
1.0 |
5 |
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2 |
10.0 |
31 |
|
3 |
35.0 |
45 |
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4 |
50.0 |
45 |
1. For Procedure I, what are the independent and dependent variables? What are the controlled variables?
2. Plot (graph) the data in Table 1. What type graph will you use and why? Hints: If you need help generating digital graphs, see my comments in the Lab 4 Submission folder or the Ask the Prof topic. The last portion of this question is not asking your opinion or which type of graph you personally prefer…
3. Describe the trend for mushroom yield as the nitrate concentration is increased. Be specific.
4. Write a hypothesis statement about the relationship between the number of mushrooms and nitrate concentration in the soil.
Procedure II – Mushroom Yield – Heavy Metal Concentration
Complete the table below using your data and information found under the Background tab.
Table 2
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Trial |
Metal Concentration Level (ppm) |
Mushroom Yield (Number of Mushrooms) |
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1 |
0.00 |
45 |
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2 |
0.50 |
34 |
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3 |
1.00 |
23 |
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4 |
1.50 |
12 |
5. Plot the data from Table 2.
6. Describe the trend for mushroom yield as the concentration of heavy metals in the soil increases. Be specific.
7. Write a hypothesis statement about the relationship between mushroom yield and the concentration of heavy metals in the soil.
8. What is the purpose of holding the nitrate concentration and the pH level at constant values for the four test levels of heavy metal concentrations?
Procedure III – Mushroom Yield – pH Dependence
Complete the table below using your data and information found under the Background tab.
Table 3
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Trial |
pH Level |
Mushroom Yield (Number of Mushrooms) |
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1 |
5.0 |
6 |
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2 |
6.0 |
27 |
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3 |
7.0 |
45 |
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4 |
8.0 |
27 |
9. For Procedure III, what are the independent and dependent variables? What are the controlled variables?
10. Plot (graph) the data in Table 3.
11. Describe the trend in mushroom yield as soil pH increases.
12. Write a hypothesis statement about the relationship between mushroom yield and soil pH.
13. Thinking about the Bigger Picture: In the real world, the fungi (mushrooms) you’ve been experimenting with belong to a food web. If an adverse environmental event – for instance, rising soil temperatures due to climate change – were to reduce fungal populations, which trophic levels would be impacted by these lower yields of fungi? Explain your reasoning.
