EXPLANATION

1) Use the data generated in the experiment to make either a bar graph, or a line graph with two separate lines.

2) Which organisms will be most frequently encountered in an ecosystem where Oysters are present?

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3) Which organisms will be most frequently encountered in an ecosystem where Zebra mussels are present?

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ELABORATION

4) Compare and contrast the communities likely to be sustained by the Zebra mussels and the Oysters.

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5) As you may have learned in 7th grade, the Oyster population in the Chesapeake Bay has been declining since the 1880's due to factors such as over harvesting, pollution and diseases. The filtering job previously done by the Oysters in a few days now takes a full year. Zebra mussels are notoriously greedy. They actually starve other organisms by removing all organic particles. What effect could the Zebra mussel have on the water quality of the Bay?

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