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Biodiversity Levels Pyramid

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About This MicroSim

This interactive three-tier pyramid helps students visualize the nested scales of biodiversity: genetic diversity within species diversity within ecosystem diversity. Each tier is clickable, revealing real-world examples with brief descriptions that make the abstract concept concrete.

The bottom tier represents Genetic Diversity (gene variants within populations, such as coat color variation in wolf packs), the middle tier represents Species Diversity (the number and variety of species in an area, such as 300+ tree species per hectare in tropical rainforests), and the top tier represents Ecosystem Diversity (the variety of ecosystems across a landscape, including forests, wetlands, and grasslands).

This supports the Bloom's taxonomy level of Understand, as students classify examples into the correct level and build a mental model of how biodiversity operates at nested scales. The visual pyramid metaphor reinforces that genetic diversity forms the foundation, supporting species diversity, which in turn supports ecosystem diversity.

How to Use

  1. Click on any tier of the pyramid to expand it and reveal 2-3 real-world examples
  2. Read the examples for each level to understand what that type of biodiversity looks like in practice
  3. Start at the bottom (Genetic Diversity) and work upward to see how the levels nest within each other
  4. Click a different tier to collapse the current one and expand the new selection
  5. Observe the color scheme: earth tones and greens represent the natural world, with darker colors at the base
  6. Note the animated transitions as tiers expand and contract

Iframe Embed Code

You can add this MicroSim to any web page by adding this to your HTML:

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<iframe src="https://dmccreary.github.io/ecology/sims/biodiversity-levels/main.html"
        height="512px"
        width="100%"
        scrolling="no"></iframe>

Lesson Plan

Grade Level

9-12 (High School Biology / Environmental Science)

Duration

10-15 minutes

Learning Objectives

  • Classify the three levels of biodiversity and give examples of each
  • Explain how genetic, species, and ecosystem diversity are nested within each other
  • Provide real-world examples of each biodiversity level
  • Describe why all three levels are important for ecosystem resilience

Prerequisites

  • Basic understanding of genes and DNA
  • Knowledge of what a species is
  • Familiarity with the concept of an ecosystem
  • Understanding that organisms vary within populations

Standards Alignment

  • NGSS HS-LS4-5: Evaluate the evidence supporting claims that changes in environmental conditions may result in changes to biodiversity
  • AP Environmental Science Topic 2.2: Biodiversity

Activities

  1. Warm-Up (2-3 min): Ask: "When you hear the word biodiversity, what comes to mind?" Most students think of species counts. Introduce the idea that biodiversity operates at three levels.
  2. Guided Exploration (5 min): Click through each tier together. For each level, ask students to brainstorm one additional example beyond what the simulation shows.
  3. Independent Investigation (5 min): Have students create a table with three columns (Genetic, Species, Ecosystem) and fill in at least two examples for each level from their local environment.
  4. Reflection (3 min): Discuss: "Why is genetic diversity important even if species diversity is high? What would happen to a crop if it had no genetic diversity and a new disease arrived?"

Assessment Questions

  1. Name the three levels of biodiversity from broadest to most specific.
  2. A forest has 200 tree species but all the oak trees are genetically identical clones. Which level of biodiversity is high and which is low? What risks does this create?
  3. Explain why losing an entire ecosystem type (like wetlands) affects biodiversity at all three levels simultaneously.
  4. A conservation plan focuses only on protecting endangered species. Using the three-level framework, argue why this approach is incomplete. What else should be protected and why?

References

  1. Biodiversity - Wikipedia - Comprehensive overview of biodiversity concepts, levels, and measurement
  2. Convention on Biological Diversity - International treaty framework for biodiversity conservation
  3. p5.js Reference - JavaScript library used for the interactive visualization