T e a c h e r  C r e a t e d  L e s s o n

Food Webs

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Royal BC Museum, Victoria, British Columbia

Eastern Grey Squirrels
Gavin Hanke, Curator, Vertebrate Zoology, Royal BC Museum
Royal BC Museum
© 2011, Royal British Columbia Museum Corporation. All Rights Reserved.
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Learning Object Collection: Aliens in the Classroom
Learning Object: The Links of Life
Giant Garden Slug
Melissa Frey, Curator of Invertebrates at the Royal BC Museum, talks about the introduced Giant Garden Slug, Limax maximus.
Royal BC Museum
© 2011, Royal British Columbia Museum Corporation. All Rights Reserved.
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Learning Object Collection: Aliens in the Classroom
Learning Object: It's All Connected
House Sparrows
Gavin Hanke, Curator of Vertebrate Zoology at the Royal BC Museum, talks about House Sparrows, Passer domesticus.
Matthew Miller, Quirke Infographica
© 2011, Royal British Columbia Museum Corporation. All Rights Reserved.
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Learning Object Collection: Aliens in the Classroom
Learning Object: Home For Who?
Smallmouth and Largemouth Bass: Invasive Alien Species
Gavin Hanke, Curator of Vertebrate Zoology at the Royal BC Museum, discusses the introduced Smallmouth and Largemouth Bass (Micropterus dolomieu, Micropterus salmoides) and their effect on the sustainability of native ecosystems in British Columbia.
Royal BC Museum
© 2011, Royal British Columbia Museum Corporation. All Rights Reserved.
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Learning Object Collection: Aliens in the Classroom
Scotch Broom Sweep at Mill Hill Regional Park
Colleen Long, Coordinator of Volunteers, CRD-Regional Parks, BC with Grade 6 Students Crystal View Elementary School
Royal BC Museum
© 2011, Royal British Columbia Museum Corporation. All Rights Reserved.
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Learning Object Collection: Aliens in the Classroom
Learning Object: Forest Invaders
Information Gathering
Watch the five videos above. They each feature a different introduced mammal, bird, fish, invertebrate and plant.

After watching the videos, draw a food web for each of the five introduced species. Be as complete as possible. Food webs can be complicated. They illustrate how plants and animals are interconnected. If one part is removed or disturbed it can affect the whole web. For example, for the smallmouth bass think about all the possible links connected to this animal. What does it eat? Where does that food come from? What else eats that food? What eats smallmouth bass? Use arrows between each image to show how they are connected.

Be as detailed as possible with the knowledge you have. Don’t worry, there will be gaps in your diagrams! Mark the gaps with a highlighter pen.

Research
Choose the one introduced species you are most interested in and conduct online research to fill in the gaps in that food web. Label the producers, consumers and decomposers. Using your online research answer the following questions:


1. How has the introduced species affected the food web it is now a part of?

2. How was the introduced species originally introduced into this food web?

3. What can be done to decrease the harm of this species on the food web it is now part of?
Synthesis
Follow the instructions in the classroom activity Stop the Aliens! to create a
Video project. Be sure to feature food webs somewhere in your video.
Stop the Aliens! - Classroom Activity
Liz Crocker
© 2011, Royal British Columbia Museum Corporation. All Rights Reserved.
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Learning Object Collection: Aliens in the Classroom
Learning Object: The Links of Life

Learning Objectives

Students will:

-analyse the different roles of organisms within a food web
-conduct online research
-synthesize information into a diagram and presentation
-consider human impacts on ecosystems