character: Nutrient Cycling Overview
topic: Nutrient Cycling in Aquatic Ecosystems
grade: 9
subject: Biology
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character: Lakes and Rivers
topic: Understanding the Role of Nutrients in Lakes and Rivers
grade: 9
subject: Biology
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character: Ecosystem Health
topic: Impact of Nutrient Imbalance on Aquatic Ecosystems
grade: 9
subject: Biology
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character: Biogeochemical Cycles
topic: The Importance of Biogeochemical Cycles in Aquatic Systems
grade: 9
subject: Biology
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