Lake Munson Group 4 Project

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Lake Munson Group 4 Project

• Sandra Azoum
• Ericka Gilliam
• Brittany Hickbottom
• Brittany Wright

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Toxicity in Lake Munson

• Is the water in Lake Munson toxic?

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What is TOXICITY?
Toxicity is the result of absorption of poisonous
toxins in a body of water.
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Hypothesis

• The water in most urban lakes is not beyond a
  toxicity level necessary to sustain life.
  Therefore, the water fleas should be able to
  survive and reproduce normally in the water
  samples taken from Lake Munson.

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Testing Toxicity

• Collect two 0.5L samples of lake water.
• Mix one of the samples with 0.5L of the cultured
  water.
• Arrange thirty cups into the cup holding tray
  ten cups for cultured water, ten cups for regular
  lake water, ten cups for the diluted lake water.
• Pour the water into their designated cups and
  pipet one water flea into each cup.
• Record the number of water fleas in each cup
  every day.
• Feed the water fleas every other day.

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Water Fleas

• For this experiment, we used Ceriodaphnia which
  is the type of water flea used to measure
  toxicity in water. The water fleas are all female
  and they reproduce asexually. Excess toxicity in
  the water samples will cause the water fleas to
  reproduce abnormally or not to reproduce at all.

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ResultsAverage Number of Water Fleas Counted
Daily
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ResultsAverage Number of Water Fleas After 10
Days Vs. Water Type
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Conclusion

• The water fleas in the water samples taken
  from Lake Munson reproduced more than the water
  fleas living in the cultured water. Therefore,
  the water samples taken from Lake Munson were not
  above a toxicity level that would prohibit
  reproduction. The water samples from Lake Munson
  may also have contained zooplankton which are
  microorganisms that water fleas eat.

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Acknowledgements

• Mr. Russel Frydenborg
• Ms. Dana Fields