character: Dr. Ellen Brooks
topic: Impacts of Cyanobacterial Nitrogen Fixation on Aquatic Ecosystems
subject: Science
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character: Professor Mark Smith
topic: Role of Nitrogen in Aquatic Ecosystems
subject: Science
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character: Dr. Alice Johnson
topic: Cyanobacteria and Their Ecological Effects
subject: Science
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character: Researcher Tom Lewis
topic: Environmental Changes Due to Cyanobacterial Blooms
subject: Science
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