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character: Keystone Species
topic: Keystone Species and their Role in Ecosystems
grade: 9
subject: Biology
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character: Predators
topic: The Role of Predators in Ecosystem Dynamics
grade: 9
subject: Biology
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character: Trophic Cascades
topic: Impact of Trophic Cascades on Biodiversity
grade: 9
subject: Biology
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character: Ecosystem Stability
topic: How Predators Contribute to Ecosystem Stability
grade: 9
subject: Biology
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