Food Web Construction Activity
You are part of a government project in assessing an aquatic ecosystem. The first order of
business is to create a food web out of data you collect. Over the course of 5 days you determine
the following:
Life Form
Stomach Contents
Algae
Black Crappie
Blue Gill
Crabs
Diatoms
Gar Pike
Gizzard Shad
Gobi
Killer Whale
Muskie
Nemotodes
Northern Pike
Octopus
Swordfish
Tapeworms
Water Plants
White Perch
Zebra Mussles
No stomach
Blue Gill, Zebra Mussels, Gizzard Shad
Algae, Water Plants
All levels
No stomach
Northern Pike, Black Crappie, White Perch
Algae, Diatoms
Algae, Water Plants
White Perch, Black Crappie, Northern Pike
Black Crappie, Northern Pike, White Perch
All levels
Gobi, Gizzard Shad, Zebra Mussels, Blue Gill
Gizzard Shad, Algae, Water Plants, Blue Gill, Zebra Mussels
Black Crappie, White Perch
All levels
No stomach
Gizzard Shad, Gobi, Blue Gill, Zebra Mussels
Water Plants
Use the data collected to create a food web that includes labels for producers, primary
consumers, secondary/tertiary consumers and decomposers. (See Example)
Producers
Primary Consumers
Secondary Consumers
Decomposers
Tertiary Consumers