Apologia Biology Module 10 – Ecology
Ecology – The study of the interactions between living and non-living things.
There wasn’t anything exciting to do for this module and since the kids get all glassy-eyed, when I lecture more than 10 minutes, I decided to make them do something fun.
Design a Food Web. A Food Web is a more accurate example of feeding relationships among organisms in an ecosystem, than a Food Chain. Working together to make a Food Web is a great way to get the students to see and understand how it all works.
I used the Everglades Food Web as my starting point. This page is copyrighted, so I picked similar free photos from the web. I also printed green arrows.
The students were to place the photos on the window, connect the photos with yarn and place green arrows in the directions the energy is moving. It was more difficult than I expected. Next year, I will plan this activity better.
The yarn was connected between the following organisms:
- producers – produce their own food.
- primary consumers – eat producers
- secondary consumers – eat primary consumers
- tertiary consumers – eat secondary consumers.
Sometimes the the trophic levels (relationship between the organism mentioned above) are changed. For example an eagle is usually a tertiary consumer when it eats a snake; but will change to a secondary when it eats a rodent. A Food Web shows this type of relationships.
All of the Food Webs I looked at on the computer and in other books, the arrows are pointing in the directions the energy flows. However; in the Apologia Biology textbook, the arrows are pointing in the other direction. I have not emailed Apologia to ask them about this.
I know the above looks like an odd Food Web, but it was the best we could do at the time. It was hard planning for this at 11:00pm the night before. LOL
I think the students began to understand the Food Web a little better after this project. I know they had fun making it. 🙂
Here are some helpful links on Food Webs.