character: Aquatic Biologist
topic: Role of Macroinvertebrates in Stream Health Assessment
subject: Science
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character: Environmental Scientist
topic: Indicators of Stream Ecosystem Health
subject: Science
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character: Freshwater Ecologist
topic: Impact of Pollution on Macroinvertebrate Populations
subject: Science
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character: Conservation Officer
topic: Monitoring Stream Environments Using Macroinvertebrate Diversity
subject: Science
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