Individuals analyze tree rings to determine the health of an ecosystem. They then look at otoliths of fish, hard calcium carbonate structures located behind the brain, in the same manner. 

Concepts

tree rings, fish, ecosystems

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Additional Tags

science

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Instructional Ideas

• Activity fits into a unit on ecology

Classroom Considerations

• Needs include access to ponderosa pine or other indigenous trees, increment bores, and otoliths from fish
• Activity includes inviting a speaker to discuss tree rings
• Resource is appropriate for elementary or middle school learners

Pros

• Analyzing growth rings in the otoliths of fish is engaging and interesting
• Activity provides a worksheet 

Cons

• None

Common Core

RST.6-8.3