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Lesson 4: Human Impact & Conservation

Learning Intentions: We Are Learning To analyze how human activities threaten NZ ecosystems and evaluate conservation strategies.

Success Criteria: I can explain major threats to native species, analyze different conservation approaches, and argue for effective solutions.

Starter (10 mins)

Before & After: NZ Landscapes

Display pairs of images showing the same NZ locations before and after human settlement (e.g., Canterbury Plains pre-European vs today, Auckland harbor 1800s vs now).

Discussion Questions:

What changes do you notice?
What might have caused these changes?
Which changes might benefit native wildlife? Which might harm it?

Key Point: Introduce the concept that humans are now the major driver of ecosystem change in NZ.

Lab Investigation (25 mins)

Possum Impact Simulation

Students conduct a hands-on investigation to understand how possums affect native forests:

Setup: Three artificial "forest plots" with different possum density scenarios

Plot A: No possums (control) - full complement of leaves/flowers
Plot B: Moderate possum pressure - some browsing damage
Plot C: High possum pressure - severe browsing damage

Investigation: Students measure "tree health" indicators (leaf cover, flower/fruit production, seedling survival) and calculate biodiversity index for each plot.

Data Analysis: Create graphs showing relationship between possum pressure and forest health.

Lab Sheet

Digital Simulation (20 mins)

"Predator Free NZ" Interactive Model

Students use an online simulation to explore the effects of different predator control strategies:

Simulation Variables:

Types of pest control (traps, poison, fencing)
Scale of control operations (local vs regional)
Budget constraints and resource allocation
Time scales (short-term vs long-term effects)

Challenge: Try to achieve "predator free" status for a virtual island within budget and time constraints.

Reflection: What strategies were most effective? What real-world challenges does this highlight?

Launch Simulation

Expert Interview (15 mins)

Conservation Professional Guest Speaker

Guest Options: DOC ranger, iwi conservationist, Zealandia guide, or conservation volunteer coordinator

Prepared Questions for Guest:

What's the biggest threat you deal with in your work?
What conservation success stories can you share?
How do you balance different stakeholder interests?
What role do local communities play in conservation?
What can young people do to help?

Alternative: If no guest available, use recorded interviews from DOC's YouTube channel or conservation documentaries.

Debate Activity (20 mins)

"Should 1080 be used for pest control?"

Divide class into three groups to debate this controversial conservation issue:

Pro-1080 Team: Research benefits - effectiveness, cost, native species recovery
Anti-1080 Team: Research concerns - environmental impacts, animal welfare, alternative methods
Judges/Public: Research the issue and ask questions to both sides

Debate Format: 5 min preparation, 3 min opening statements each, 5 min rebuttals, 2 min closing arguments

Learning Focus: Understanding multiple perspectives and complexity of conservation decisions

Debate Guide

Te Ao Māori Perspective: Kaitiakitanga in Action

Traditional Māori conservation involves holistic ecosystem management:

Rāhui: Temporary restrictions to allow species/areas to recover
Seasonal harvesting: Taking only what's needed, when appropriate
Habitat management: Active management like controlled burning to maintain ecosystems
Community responsibility: Entire whānau/iwi involved in conservation decisions

Modern Examples: Tainui's work restoring Lake Taupo fisheries, Ngāi Tahu's whale watching guidelines, iwi-DOC conservation partnerships.

Discussion: How can traditional approaches complement modern conservation science?

Case Study: Zealandia Ecosystem Restoration

Background: 225-hectare fenced sanctuary in Wellington that demonstrates ecosystem restoration in action.

Student Investigation Tasks:

Research the "before" state - what was Zealandia like before restoration?
List the key restoration techniques used (fencing, pest control, replanting, species reintroduction)
Document success stories - which species have returned?
Identify ongoing challenges and management needs
Calculate the costs and benefits of the project
Evaluate: Could this model work elsewhere in NZ?

Extension: Virtual field trip using Zealandia's online resources and webcams.

Practical Investigation

Invasive Species Impact Modeling

Students model how quickly invasive species can spread and impact ecosystems:

Equipment: Grid paper, colored counters, calculators, timer

Method:

Set up 10x10 grid representing forest ecosystem
Place green counters for native plants, blue for water, brown for soil
Introduce red counters (invasive species) at random starting points
Each "year" (round), invasive species spread to adjacent squares
Native species are displaced where invasives establish
Track changes over 10 "years" and graph results

Variables to test: Different starting numbers of invasives, introduction of control measures, presence of natural barriers.

Assessment Task

Conservation Action Letter

Task: Write a persuasive letter (400 words) to the Department of Conservation advocating for action on a specific conservation issue of your choice.

Requirements:

Issue identification: Clearly describe the conservation problem
Evidence: Use scientific data to support your concerns
Impact analysis: Explain consequences if no action is taken
Proposed solution: Suggest specific, realistic actions
Multiple perspectives: Acknowledge different stakeholder viewpoints
Call to action: Request specific response from DOC

Assessment Focus: Scientific reasoning, persuasive writing, understanding of conservation complexity

Letter Template View Rubric

Current Conservation Issues

Kauri Dieback Disease

Fungal disease threatening ancient kauri forests. Students research prevention strategies and cleaning protocols.

Marine Plastic Pollution

Impact on seabirds and marine mammals. Connection to waste management and consumer choices.

Climate Change Effects

Rising sea levels affecting coastal species, changing temperatures impacting alpine ecosystems.

Urban Development Pressure

Habitat loss in growing cities. How can urban planning better protect biodiversity?

Resources Needed

Digital Resources:

DOC website and YouTube channel
Predator Free NZ simulation
Zealandia online resources
1080 debate resource materials
Conservation project case studies

Physical Resources:

Before/after landscape photographs
Possum impact demonstration materials
Grid paper and colored counters
Calculators and timers
Guest speaker technology setup

Teacher Notes

Controversial Topics: 1080 debate can be emotional. Emphasize evidence-based arguments and respectful discussion.
Guest Speaker Backup: Have recorded content ready if live guest unavailable. Contact DOC education team well in advance.
Local Connections: Research specific conservation issues in your local area to make content more relevant.
Positive Focus: Balance discussion of problems with success stories to avoid overwhelming students.
Action Orientation: Emphasize what students can do, not just problems they can't solve.
Cross-curricular: Strong links to Social Studies (environmental policy), English (persuasive writing), Mathematics (data analysis).

Media Anchor: Conservation in Action

Watch and capture evidence before moving into the lesson tasks.

What tension between human activity and ecosystem health is visible here?
Name one action that shows practical kaitiakitanga in conservation work.

📋 Teacher Planning Snapshot

Ngā Whāinga Ako — Learning Intentions

Students will engage with this resource to build understanding of Aotearoa New Zealand's ecosystems, biodiversity, and the role of kaitiakitanga in environmental stewardship.

Ngā Paearu Angitū — Success Criteria

✅ Students can explain key concepts from this resource using their own words.
✅ Students can connect the content to real-world environmental contexts in Aotearoa.

Differentiation & Inclusion

Scaffold support: Provide sentence starters, word banks, or graphic organisers to scaffold access for students who need it. Offer entry-level and extension tasks to address a range of readiness levels.

ELL / ESOL: Pre-teach key vocabulary and provide bilingual glossaries where available. Allow students to respond in their home language first.

Inclusion: Use accessible formats. Neurodiverse learners benefit from chunked instructions and choice in how they demonstrate understanding.

Prior knowledge: Best used after the relevant lesson sequence. No specialist prior knowledge required for entry-level engagement.

Curriculum alignment

Earth Systems — Practices: Applying understanding of carbon movement to real-world contexts (e.g. climate change mitigation, land use planning, energy choices), using evidence to evaluate the effectiven…
Ecosystems — Practices: Researching interventions that address specific ecosystem disruptions, using case studies or local examples to explore the practicalities and outcomes of different solutions (…
Ecosystems — Knowledge: Human activity (e.g. agriculture, urbanisation, resource extraction, industry, recreation) can cause habitat destruction, pollution, and climate change, which threaten ecosyst…
Ecosystems — Practices: Interpreting data (e.g. graphs, maps) to evaluate how human activity (e.g. agriculture, resource extraction) influences ecosystem stability and biodiversity
Statistics — Knowledge: - Multivariate data is data in a set that has more than two variables. - Data can be collected from observational studies in which the observers do not alter or control the be…