- Provide an example of a food chain in the area where you live. Georgia
- Humans are parts of food chains and food webs, too. Where on a food web would you typically find humans (near the bottom with the producers, at the top with carnivores, or somewhere in between)?
- What are some advantages of being part of a food web rather than a food chain?
Here is a food web for Lake Michigan:
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Remember to read the Discussion requirements, found in the Unit 4 "Directions" Icon.
- In the Lake Michigan food web, is it possible to identify the most important producer? Why or why not?
- What would happen if there was a change in the population size for any one of the producers (either an increase or a decrease)? How could these changes impact other producers and organisms on other trophic levels?
- Provide at least two types of impacts that humans could have on this food web.
- Read the description of the sea lamprey on page 2 of the food web. This species is described as non-native.
- Propose a mechanism for how this fish was introduced to Lake Michigan.
- What challenges could occur within a food web when a new predator like this is introduced into an ecosystem?
- What natural population controls are missing for this species within this food web?
- Do you think steps should be taken to eradicate this species from the food web? Explain why or why not? If so, what steps can be implemented?
Trefil, J., & Hazen, R.M. (2011). The Sciences: An integrated approach. Hoboken, NJ: John Wiley & Sons, Inc.
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