Ecosystem Resilience and Biodiversity

Active learning works for this topic because students need to see ecological relationships in motion, not just read about them. When they manipulate food webs or analyze real-world data, they grasp how biodiversity loss ripples through systems far more than any lecture could explain.

• Year 10
• Geography
• 4 activities
• 35 min–50 min

Learning Objectives

1. Analyze the relationship between species richness and ecosystem stability in a given Australian biome.
2. Evaluate the impact of a specific invasive species on the biodiversity and resilience of a local ecosystem.
3. Compare the recovery rates of two different ecosystems following a simulated disturbance, identifying factors contributing to resilience.
4. Explain the role of a keystone species in maintaining the structure and function of a temperate forest ecosystem.
5. Predict the consequences of biodiversity loss on essential ecosystem services, such as water purification or pollination.

Jigsaw

⏱ 50 min·Pairs

Food Web Simulation: Disturbance and Recovery

Provide species cards with roles and links; students assemble food webs in pairs. Introduce disturbances by removing cards (e.g., predators), then track cascading effects over 5 rounds by noting surviving species and functions. Regroup to share recovery strategies.

Prepare & details

Predict how biodiversity loss affects ecosystem stability and function.

Facilitation Tip: During the Food Web Simulation, have students pause after each disturbance to predict one change they expect to observe before continuing the simulation.

Setup: Flexible seating for regrouping

Materials: Expert group reading packets, Note-taking template, Summary graphic organizer

• Understand
• Analyze
• Evaluate
• Relationship Skills
• Self-Management

Jigsaw

⏱ 45 min·Small Groups

Jigsaw: Keystone Species

Assign small groups to research one Australian keystone species (e.g., sea otters, dingoes). Experts teach home groups impacts of their loss. Groups then predict ecosystem changes and propose restoration.

Prepare & details

Explain why some ecosystems are more vulnerable to invasive species.

Facilitation Tip: For the Jigsaw Expert Groups, assign each group a different keystone species and require them to prepare a one-minute explanation of its unique impact on their ecosystem.

Setup: Flexible seating for regrouping

Materials: Expert group reading packets, Note-taking template, Summary graphic organizer

• Understand
• Analyze
• Evaluate
• Relationship Skills
• Self-Management

Stations Rotation

⏱ 40 min·Small Groups

Stations Rotation: Biodiversity Scenarios

Set up stations with Australian case studies (Reef, bushland). Groups assess resilience factors, simulate biodiversity loss with manipulatives, record predictions. Rotate twice, consolidate whole class.

Prepare & details

Assess the role of keystone species in maintaining ecosystem health.

Facilitation Tip: Set a strict 8-minute timer for each station in the Biodiversity Scenarios rotation to keep energy high and prevent groups from over-analyzing any single scenario.

Setup: Tables/desks arranged in 4-6 distinct stations around room

Materials: Station instruction cards, Different materials per station, Rotation timer

• Remember
• Understand
• Apply
• Analyze
• Self-Management
• Relationship Skills

Jigsaw

⏱ 35 min·Pairs

Data Analysis Pairs: Invasive Impacts

Pairs graph real data on invasive species spread (e.g., cane toads) versus native biodiversity metrics. Hypothesize resilience thresholds, present findings to class for debate.

Prepare & details

Predict how biodiversity loss affects ecosystem stability and function.

Facilitation Tip: During the Data Analysis Pairs activity, provide colored highlighters so students can visually map relationships between invasive species introduction dates and native species decline rates.

Setup: Flexible seating for regrouping

Materials: Expert group reading packets, Note-taking template, Summary graphic organizer

• Understand
• Analyze
• Evaluate
• Relationship Skills
• Self-Management

Teaching This Topic

Approach this topic by starting with concrete examples before abstract theory. Use Australian ecosystems as anchors because students connect more readily to local issues. Avoid getting stuck on definitions—instead, focus on interactions and consequences. Research shows that role-playing disturbances helps students understand tipping points better than static diagrams ever could.

What to Expect

Students will demonstrate resilience concepts by predicting outcomes, identifying keystone roles, and linking biodiversity to recovery. They should move from surface observations to deeper reasoning about thresholds and management by the end of these activities.

Watch Out for These Misconceptions

Common Misconception

During Food Web Simulation, watch for students who assume removing any species has the same impact on the web.

What to Teach Instead

Pause the simulation after the first species removal and ask students to compare the actual outcomes when a redundant species is removed versus a unique keystone species, using the provided role cards to guide their observations.

Common Misconception

During Food Web Simulation, watch for students who believe ecosystems always bounce back to their original state after a disturbance.

What to Teach Instead

After the second disturbance in the simulation, ask groups to discuss and record whether their ecosystem returned to its starting point or shifted to a new stable state, using evidence from their simulation logs.

Common Misconception

During Station Rotation: Biodiversity Scenarios, watch for students who think rare species are the most critical to ecosystem health.

What to Teach Instead

Provide a scenario where a common species like a particular grass is removed, then guide groups to track changes in soil stability and pollination services to highlight the importance of functional roles over rarity.

Assessment Ideas

Exit Ticket

After Food Web Simulation, ask students to write one paragraph explaining how removing a species with a unique role affected their ecosystem compared to removing a species with a redundant role.

Discussion Prompt

After Jigsaw Expert Groups, facilitate a class discussion where each group presents their keystone species and the class identifies common traits among resilient ecosystems that rely on these species.

Quick Check

During Station Rotation: Biodiversity Scenarios, circulate and listen for students to correctly identify the service most at risk when biodiversity declines in each scenario (e.g., pollination, water filtration).

Extensions & Scaffolding

• Challenge students to design their own invasive species scenario, including a plausible entry point and a predicted tipping point for ecosystem collapse.
• Scaffolding: For the Food Web Simulation, provide pre-labeled species cards with their primary roles to help struggling students focus on connections rather than identification.
• Deeper: Have students research and present on a real Australian ecosystem that has undergone a regime shift due to invasive species or climate change.

Key Vocabulary

Resilience	The capacity of an ecosystem to withstand disturbances, such as fires or droughts, and to recover its structure and function afterward.
Biodiversity	The variety of life within a particular habitat or ecosystem, encompassing species diversity, genetic diversity, and ecosystem diversity.
Invasive Species	A non-native species that spreads aggressively and outcompetes native organisms, often disrupting ecosystem balance and reducing biodiversity.
Keystone Species	A species that has a disproportionately large effect on its environment relative to its abundance, playing a critical role in maintaining ecosystem structure and function.
Ecosystem Stability	The ability of an ecosystem to resist change and maintain its fundamental structure and processes over time, often linked to its biodiversity.