character: River Assessment
topic: Biological Indicators in River Health
grade: 9
subject: Biology
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character: Ecological Monitoring
topic: Using Macroinvertebrates for Assessing Water Quality
grade: 9
subject: Biology
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character: Freshwater Ecosystems
topic: Indicator Species for River Flow Assessment
grade: 9
subject: Biology
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character: Aquatic Biology
topic: Effects of Organism Diversity on River Health
grade: 9
subject: Biology
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