Explore ecosystem interactions through five real-world species case studies designed for Grade 7 science. This ecosystem activity focuses on how organisms affect one another through predator-prey relationships, competition, and species partnerships, helping students examine how interactions shape food webs and ecosystem balance.

Rather than studying species relationships as isolated definitions, students use evidence from real ecosystems to investigate direct and indirect effects on organisms and their communities. They compare ecological changes and consider how shifts in predator populations, competition, and partnerships can influence ecosystem dynamics.

Investigating Species Relationships

The five ecosystem station cards provide the central investigation. Students explore different ways species interact and explain the effects these relationships have on the organisms involved. The case-study approach encourages students to connect individual species interactions with wider changes in food webs and community structure.

Throughout the activity, students practise:

• Identifying different types of species interactions and their effects.
• Using evidence from real ecosystems to explain ecological relationships.
• Tracing direct and indirect effects within food webs.
• Comparing the consequences of changes in predator numbers.
• Explaining how competition and species partnerships influence ecosystem balance.

What Is Included?

• Five station cards: Present the ecosystem case studies for student investigation.
• Station recording sheet: Provides a place for students to record their investigation work.
• Station wrap-up: Gives students an opportunity to bring their station learning together.
• Teacher Guide: Included in the Answer Key PDF, with learning objectives, teaching tips, discussion questions, and common mistakes.

Classroom Use

Use these ecosystem learning stations during a Grade 7 life science unit on interactions, energy, and dynamics. Students can work through the case studies, record their observations and explanations, and complete the station wrap-up to connect individual examples to broader ecosystem patterns.

The recording sheet and wrap-up provide a structure for student work, while the teacher guide offers preparation support and discussion prompts for exploring how species relationships influence ecological communities. The resource can also support a focused review of food webs, predator-prey interactions, competition, and species partnerships.

NGSS Connection

This resource lists NGSS standard MS-LS2-2 as its curriculum framework connection. Its focus on explaining species interactions and examining their direct and indirect effects provides a context for discussing relationships within ecosystems.

For teachers covering Grade 7 ecosystems, these species case studies bring together ecological evidence, food-web thinking, and comparisons of changing species relationships in one structured station activity.