🌲 Help Grade 6 students explore how forests respond to disturbances and change through ecological succession! This Disturbance Regimes and Forest Succession worksheet provides focused science practice for students learning about forest ecosystems, ecological succession, natural disturbances, ecosystem recovery, biodiversity, and environmental change. Designed with Grade 6 Alberta Science learning in mind, this resource helps students understand that forests are dynamic ecosystems that can change, recover, and develop over time.

Forest fires, windstorms, insect outbreaks, flooding, and human activities can alter ecosystem conditions. Rather than viewing every disturbance as a single isolated event, students can begin exploring how the type, frequency, and intensity of disturbances influence forest communities. This worksheet connects those ideas with succession and ecosystem recovery while providing Student Notes lines at the bottom of the worksheet for vocabulary, observations, explanations, and lesson takeaways.

🌿 WHY TEACHERS WILL LOVE THIS RESOURCE
This worksheet combines ecology, environmental science, and scientific reasoning in one focused resource. It can complement lessons on ecosystems, forests, biodiversity, environmental change, and human impacts.

✓ Focuses on disturbance regimes and forest succession
✓ Reinforces how ecosystems change over time
✓ Connects natural disturbances with ecosystem recovery
✓ Supports understanding of biodiversity and habitat change
✓ Encourages cause-and-effect and systems thinking
✓ Works for guided practice, independent work, homework, or review
✓ Includes dedicated Student Notes lines
✓ Complements forest diagrams, succession sequences, readings, and environmental case studies

🔥 EXPLORE DISTURBANCES IN FOREST ECOSYSTEMS
Disturbances can change the structure and conditions of a forest ecosystem. Examples may include wildfire, windstorms, flooding, insect outbreaks, disease, and human activities. Different disturbances can affect organisms, resources, and habitats in different ways.

Students can use this topic to develop a more nuanced understanding of environmental change. A disturbance can damage or remove organisms, but it can also create new conditions and opportunities for other organisms. This makes forest disturbance an engaging context for exploring ecosystem interactions and change over time.

🌲 UNDERSTAND DISTURBANCE REGIMES
A disturbance regime considers patterns of disturbance within an ecosystem, including characteristics such as frequency, intensity, type, and spatial extent. At an age-appropriate level, students can begin recognizing that forests may experience different kinds of disturbances at different intervals and that these patterns influence ecosystem development.

This perspective helps students move beyond thinking of a disturbance simply as a “good” or “bad” event. Instead, they can investigate how disturbances are part of the changing conditions that shape many natural ecosystems.

🌱 FOLLOW FOREST SUCCESSION
After a disturbance, an ecosystem may change gradually as organisms establish, grow, compete, and interact. This process is commonly described as ecological succession. Students can explore how vegetation and habitat conditions may change through different stages of forest recovery.

Depending on the disturbance, soil and other biological materials may remain, allowing recovery to proceed from existing ecosystem components. Students can examine how grasses, shrubs, young trees, and later forest communities may become established over time, while recognizing that real succession does not always follow one perfectly fixed pathway.

📚 KEY SCIENCE CONCEPTS
Depending on how this worksheet is incorporated into instruction, students can reinforce concepts including:

• Forest ecosystems
• Ecological succession
• Disturbance regimes
• Natural disturbances
• Wildfire and forest change
• Wind and storm disturbances
• Insect outbreaks
• Ecosystem recovery
• Habitat change
• Biodiversity
• Species interactions
• Environmental conditions
• Change over time
• Ecosystem resilience

🧠 BUILD CAUSE-AND-EFFECT REASONING
Forest succession provides a strong context for helping students examine relationships between events and outcomes. A disturbance may change available light, vegetation cover, habitat structure, soil conditions, or resource availability. These changes can then influence which organisms are able to survive or establish.

Students can practice asking questions such as: What changed after the disturbance? Which organisms might be affected? What conditions are now different? How might the ecosystem change over time? These questions encourage deeper scientific reasoning and help students recognize interconnected relationships within ecosystems.

🔬 SUPPORTS GRADE 6 ALBERTA SCIENCE LEARNING
Designed for Grade 6 Alberta Science, this worksheet can supplement instruction involving forests, biodiversity, ecosystems, environmental change, human impacts, and scientific investigation. The topic provides opportunities for students to connect ecosystem concepts with examples that are especially meaningful in forested environments.

Teachers can pair the worksheet with photographs, diagrams, videos, local examples, forest succession sequences, or environmental case studies. These supports can help learners visualize how ecosystem structure and species composition may change following a disturbance.

🌎 CONNECT LEARNING TO REAL FOREST ENVIRONMENTS
Forest disturbances occur in real ecosystems, making this topic well suited for authentic environmental science connections. Students can investigate examples of forest fires, insect outbreaks, storms, or other events and consider how forests respond afterward.

These connections can be especially useful for helping students understand that ecosystems are dynamic rather than permanently fixed. Forests may change throughout decades or longer periods as organisms respond to environmental conditions and disturbance events.

✏️ SKILLS STUDENTS CAN STRENGTHEN
• Identifying examples of ecosystem disturbances
• Explaining basic ecological succession
• Sequencing stages of ecosystem change
• Connecting disturbances with habitat changes
• Comparing conditions before and after disturbance
• Recognizing patterns of ecosystem recovery
• Applying ecology vocabulary in context
• Analyzing cause-and-effect relationships
• Connecting biodiversity with changing habitats
• Using evidence to explain ecosystem changes
• Developing systems thinking
• Communicating scientific ideas clearly

🔎 EXPLORE BIODIVERSITY THROUGH SUCCESSION
As environmental conditions change during succession, the organisms present in an area may also change. Different plants and animals have different habitat requirements, so changes in vegetation structure, food availability, shelter, and other resources can influence biodiversity.

This creates an opportunity to connect forest succession with broader concepts involving habitats, organism interactions, adaptation, biodiversity, and ecosystem function. Students can consider how changes in one part of a forest system may influence many other components.

🔥 DEVELOP A BALANCED VIEW OF WILDFIRE
Wildfire provides an important example of ecological disturbance. Although fires can cause major immediate changes, fire is also a natural disturbance in many forest ecosystems. The ecological effects depend on factors such as fire severity, frequency, ecosystem type, and conditions before and after the event.

This gives teachers an opportunity to help students develop a more scientifically accurate understanding of disturbance. Rather than assuming all ecosystem change is automatically harmful or beneficial, learners can examine evidence and consider how different disturbances produce different ecological outcomes.

📊 CONNECT ECOLOGY WITH PATTERN ANALYSIS
Succession can also reinforce students' ability to recognize patterns over time. Teachers can use diagrams, timelines, photographs, or simplified data to help students compare ecosystem conditions at different stages after a disturbance.

Students might identify changes in vegetation, canopy cover, species presence, or other observable features. This strengthens the connection between ecological concepts and scientific evidence while developing interpretation and comparison skills.

📝 STUDENT NOTES SPACE INCLUDED
The worksheet includes Student Notes lines at the bottom, giving students a convenient place to record key vocabulary, teacher explanations, examples, or conclusions. Learners might define disturbance and succession, record examples of forest disturbances, or summarize how an ecosystem can change after an event.

The notes space can also support differentiated instruction by providing room for sentence starters, vocabulary reminders, or teacher-provided examples. Keeping these supports directly with the worksheet creates a useful reference for later review.

🏫 FLEXIBLE FOR DIFFERENT CLASSROOM ROUTINES
This Grade 6 science worksheet can fit naturally into a variety of instructional settings. Use it for:

• Whole-class ecology instruction
• Forest ecosystem lessons
• Environmental science activities
• Independent student practice
• Guided practice
• Science centres or stations
• Homework or take-home practice
• Small-group instruction
• Early finisher activities
• Substitute teacher plans
• Unit review
• Biodiversity and ecosystem change lessons

💡 BUILD SYSTEMS THINKING IN ECOLOGY
Disturbance and succession help students recognize that ecosystems involve many interacting components. Changes to vegetation can affect habitats, resources, species interactions, and environmental conditions. Those changes can influence what happens next within the ecosystem.

Developing this perspective supports systems thinking and prepares students for future science learning involving ecosystem dynamics, conservation, resilience, environmental management, and human impacts.

📌 RESOURCE AT A GLANCE
Subject: Science
Grade Level: Grade 6
Framework: Alberta
Topic: Disturbance Regimes and Forest Succession
Primary Focus: Forest disturbances, ecological succession, ecosystem recovery, biodiversity, and environmental change
Included Extra: Student Notes lines at the bottom of the worksheet

🌲 MAKE FOREST SUCCESSION AND ECOSYSTEM CHANGE MEANINGFUL
Give Grade 6 learners focused practice exploring how forests respond to disturbance and change over time. Disturbance Regimes and Forest Succession helps students connect wildfire and other disturbances with ecological succession, biodiversity, habitat change, and ecosystem recovery while strengthening scientific reasoning and systems thinking.

Add this Grade 6 Alberta Science worksheet to your ecology, forest ecosystems, biodiversity, environmental science, and succession resources for engaging practice, review, and reinforcement!