Aquatic Indicators

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Aquatic Indicators

• Text Ted Schaffer
• Editor Laurie Rosenberg
• Assistant Editor Nadine Smith
• Illustrator Jamie Buckwalter

MUHLENBERG COLLEGE
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Living Things as Indictors of Water Quality
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Esherichia Coli (E. Coli)
http//www.bact.wisc.edu/Bact330/lectureecoli
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E. Coli Colonies on Agar Plate
http//www.bact.wisc.edu/Bact330/lectureecoli
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Dissolved Oxygen Testing
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Collecting Aquatic Organisms
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• Fast running streams with cold water - high
  dissolved oxygen levels.

• Still, shallow bodies of water - low dissolved
  oxygen levels.

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Larvae Dobsonfly, Mayfly, Stonefly
Illustrations by
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Damselfly adult and larvae (with gills)
http//biodidac.bio.uottawa.ca
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Examples of Fairly Tolerant Organisms
Scud or amphipod
Midge Fly Larvae
Illustrations by
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AquaticEarthworm, Rat-tailed Maggot, Nematode