Reference no: EM132166420

Experiment 1: Ecological Interactions

Table 1 Volume and Concentration Totals (12 points)
Trophic Level	Cylinder	Volume of H2O	Volume of Oil	Total Volume	Percent Oil
1st	1000 mL		1000 mL
2nd	100 mL		100 mL
3rd	10 mL		10 mL

1. What is the percent concentration of oil in the first, second, and third trophic levels in our food chain?

2. How does the change in concentration represent biomagnification?

3. How does this also illustrate the amount of energy transferred from one trophic level to the next?

Experiment 2: Environmental Variables that Effect Dissolved Oxygen Levels

1. Photograph yourself with your name, date and the body of water visible.

2. Photograph your test tubes from PART 1 after you take your final reading from each. Make sure they are clearly labeled and your name and date clearly visible in the picture

3. Photograph your canning jar and test tubes from PART 2 after you take your final reading from each. Make sure they are clearly labeled and your name and date visible in the picture

4. Photograph your test tube from PART 3 after you take your final reading from each. Make sure they are clearly labeled and your name and date visible in the picture

Table 2: Dissolved Oxygen Analysis (6 points)
Biochemical Oxygen Demand Analysis	ppm
Fresh Water Sample (Test Tube 1)
Water Sample after 5 Days (Test Tube 2)
Effect of Temperature	ppm
Boiled (temperature: )
Refrigerator (temperature: )
Room Temperature (temperature: )
Effect of Salinity	ppm
Brine Solution

5. State your conclusions on the level of oxygen in the samples you analyzed. What types of water systems would you expect them to come from? Are these values high or low? What type of aquatic life would you expect to find in the sources of these samples?

6. Cold, dense water sinks at the poles and drives a deep circulation in the North Atlantic Ocean. What would you expect the comparative DO levels to be in this water? Why?

Experiment 3: Oil Spills and Aquatic Animals

7. Which solution cleaned and restored the items most effectively?

8. Identify one marine species with an outer layer which is similar to the chamois cloth, and one which is similar to the feathers.

9. How might aquatic species be affected in a natural environment if a coat or outer shell was compromised by pollution? How might bird species be affected?

10. Aquatic life may be directly affected when oil leaks or spills occur. For example, the Deepwater Horizon oil spill in 2010 (which is considered to be the largest oil spill in petroleum industry history) affected over 8,000 marine species including fish, birds, mammals, and more. Research one species (plant or animal) that can be affected by oil spills.