Independent Variables: At least one area with high concentration of zebra mussels, low concentration, and moderate concentration
Relevant Variables: Measure the pH, Dissolved Oxygen, Chloride ion and the macro-invertebrates found in the water to determine water quality.
Zebra mussels are an invasive species in the Great lakes region originally from eastern Europe that have spread across the continental US since the 80's. They are filter feeders who purify the water, but also feed on microscopic organisms, causing a disruption in the feedback loops of the native species. They compete with juvenile fish and other mussels. They can clog up irrigation equipment, and they collect a lot of pollutants, causing trouble up the food chain due to biomagnification. They have more than doubled water visibility, but while that might look nice, that is very harmful to the native ecosystem.
http://www.protectyourwaters.net/hitchhikers/mollusks_zebra_mussel.php
https://www.nwf.org/Wildlife/Threats-to-Wildlife/Invasive-Species/Invasive-Mussels.aspx
http://www.dnr.state.mn.us/invasives/aquaticanimals/zebramussel/index.html
Hypothesis: Areas with a high concentration of zebra mussels will have fewer microorganisms and have a lower turbidity due to the filter feeding nature of zebra mussels.
Method: The controlled variables will be controlled by taking a sample of the bottom of the lake at similar depths and making a visual determination of the amount of zebra mussels. Differences will be made note of. Tests of the qualities of the water will be made.
Procedure:
I) A dredge will be used to sample the bottom of the lake
II) Count the amount of zebra mussels found
III) Take a water sample
IV) Test the turbidity, dissolved oxygen levels, pH, chloride, and hardness.
V) Find a new location with a similar depth
VI) Repeat
VII) Compare differences found in relation to how many zebra mussels were found
Will we be able to go into the engine room after the trip?
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