Interdependence and Competition

Active learning is essential for grasping the dynamic nature of interdependence and competition in ecosystems. Engaging students in hands-on challenges and simulations allows them to directly experience how organisms interact and depend on one another for survival.

• Year 10
• Biology
• 3 activities
• 30 min–45 min

Role Play

⏱ 45 min·Small Groups

Food Web Construction Challenge

Provide students with a list of organisms from a specific ecosystem. In small groups, they must research the feeding relationships and construct a detailed food web, identifying producers, consumers, and decomposers. This activity encourages collaboration and reinforces understanding of energy flow.

Prepare & details

Analyze the strategies organisms use to survive in extreme environments.

Facilitation Tip: During the Food Web Construction Challenge, circulate to ensure groups are accurately representing energy flow and identifying multiple trophic levels, using the provided organism list as their primary resource.

Setup: Open space or rearranged desks for scenario staging

Materials: Character cards with backstory and goals, Scenario briefing sheet

• Apply
• Analyze
• Evaluate
• Social Awareness
• Self-Awareness

Role Play

⏱ 30 min·Small Groups

Competition Simulation: Resource Scarcity

Divide the class into groups representing different species competing for limited resources (e.g., tokens representing food or water). Groups must strategize to gather resources, demonstrating intraspecific and interspecific competition. Debriefing focuses on successful strategies and the consequences of resource depletion.

Prepare & details

Compare different types of interspecific and intraspecific competition.

Facilitation Tip: In the Competition Simulation: Resource Scarcity, monitor the resource allocation to ensure equitable distribution initially, then observe how groups adapt their strategies as resources dwindle, reflecting the core mechanics of resource scarcity.

Setup: Open space or rearranged desks for scenario staging

Materials: Character cards with backstory and goals, Scenario briefing sheet

• Apply
• Analyze
• Evaluate
• Social Awareness
• Self-Awareness

Role Play

⏱ 40 min·Individual

Invasive Species Impact Case Study

Present students with case studies of invasive species (e.g., grey squirrels in the UK, zebra mussels). Individually or in pairs, they research the introduced species, its adaptations, and its impact on native species and the ecosystem. A class discussion synthesizes findings and explores mitigation strategies.

Prepare & details

Predict the consequences of introducing a non-native species into an ecosystem.

Facilitation Tip: For the Invasive Species Impact Case Study, prompt students to identify the specific ecological niche the invasive species occupies and how its presence disrupts the existing interspecific competition and interdependence within that ecosystem.

Setup: Open space or rearranged desks for scenario staging

Materials: Character cards with backstory and goals, Scenario briefing sheet

• Apply
• Analyze
• Evaluate
• Social Awareness
• Self-Awareness

Teaching This Topic

Experienced teachers approach interdependence and competition by moving beyond simple definitions to exploring complex dynamics through student-led discovery. It's crucial to avoid oversimplification and instead foster inquiry into the nuances of these relationships, using real-world examples to illustrate the delicate balance and cascading effects within habitats.

What to Expect

Successful learning means students can articulate the different types of relationships in an ecosystem, such as predation and mutualism, and explain how competition, both within and between species, shapes populations. They will be able to predict potential impacts of changes within an ecosystem.

Watch Out for These Misconceptions

Common Misconception

During the Competition Simulation: Resource Scarcity, students might assume competition only occurs between different species.

What to Teach Instead

Redirect by asking students to consider how their own 'species' group might compete for resources amongst themselves, highlighting intraspecific competition using the same limited resources.

Common Misconception

When analyzing the Invasive Species Impact Case Study, students may believe that the invasive species will inevitably lead to the extinction of native prey.

What to Teach Instead

Guide students to analyze the case study data for evidence of population fluctuations rather than complete eradication, prompting them to discuss the concept of dynamic equilibrium in predator-prey relationships as it applies to the invasive species and its new food sources.

Assessment Ideas

Quick Check

After the Food Web Construction Challenge, review the constructed food webs to assess students' understanding of trophic levels and energy flow within the ecosystem.

Discussion Prompt

During the Competition Simulation: Resource Scarcity, use student discussions within groups and their justifications for resource acquisition strategies to gauge their understanding of competition dynamics.

Peer Assessment

Following the Invasive Species Impact Case Study, have students present their analysis and engage in peer feedback, focusing on how well they identified the impacts on interdependence and competition within the ecosystem.

Extensions & Scaffolding

• Challenge: Ask students to research and present an additional organism's role in the ecosystem for the Food Web Construction Challenge, considering its specific interdependencies and competitive pressures.
• Scaffolding: Provide partially completed food webs or competition matrices for the respective activities, with key relationships already identified, to guide students who need more structure.
• Deeper Exploration: Have students research a current conservation issue related to interdependence or competition and present their findings, linking it to the concepts explored in the activities.