Freshwater Ecosystem Answer Key (Use the Rubric for grading)
Food Web
Green Algae
Minnows
Water spider
Brown Trout
Otters
Turtle
Parasite
Bears
Food Chain (one option) (try to catch, make sure sea sponges is not first since they are not a
producer)
Green Algae
Brown Trout
Parasite/Otters/Bears
Producer
Primary Consumer
Secondary Consumer
Energy Pyramid (whichever they chose from above inputted into the pyramid (here is one ex)
Bears
Trout
Green Algae
3rd trophic/Secondary Consumer
2nd trophic/primary consumer
1st trophic/ producer
Questions: (5pts)
1. List the herbivores in your food web? Brown trout
2. In your energy pyramid, which organisms receives the most energy from the producer? Trout
3. In your energy pyramid, which organism receives the least energy from the producer? Bear
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