Food web construction
Name _________________________________________________ Date ______________ Period ______
Procedure:
1. Use the organisms below to construct a logical food web on the back of this page, being sure to
draw the arrows in the appropriate direction showing energy flow.
2. Use the Manipulative Cards to construct a food web. Once your group has constructed the food
web, inform your teacher for it to be checked. The teacher must initial the food web to receive
credit. ________(Teacher Initials)
3. After the teacher has checked your food web, draw it in the space provided.
4. Use your food web to answer the questions below.
5. Turn in this sheet with the food web drawn and all questions answered in complete sentences
by the end of the period. This is for a grade.
Mouse eats:
Grasshoppers
Snails
Salt marsh plants
Hawk eats:
Shrews
Mice
Rats
Sparrow eats:
Crustaceans
Salt marsh plants
Grasshoppers
Snails
Fish eats:
Crustaceans
Salt marsh plants
Salt marsh algae
Salt water algae energy source:
Sunlight
CO2
Water
Rat eats:
Sparrows
Grasshoppers
Snails
Salt marsh plants
Duck eats:
Crustaceans
Salt marsh plants
Salt marsh algae
Grasshoppers
Snails
Shrew eats:
Grasshoppers
Snails
Mice
Owl eats:
Rats
Sparrows
Ducks
Sandpipers
Sandpiper eats:
Crustaceans
Salt marsh algae
Heron eats:
Fish
Grasshopper eats:
Salt marsh plants
Salt marsh plants energy source:
Sunlight
CO2
Water
Snail eats:
Salt march plants
Salt marsh algae
Crustacean eats:
Salt marsh algae
1. Using the food web your group constructed, design 3 Food Chains in the space provided below.
2. Explain how the Food Web would be affected if all Producers were removed.
3. Name 3 organisms that would be affected if the snails become extinct? Pick one of the
organisms and explain how it would be affected.
4. What would happen to the mouse population if the hawks became extinct?
5. If the fish went extinct which species would be drastically affected? Explain how would this
species be affected?
6. A new invasive species of fish moves into the area and eats most of the salt marsh algae, what
would most likely happen to the other species that eat algae?
Drawing for Constructed Food Web: