Name: ____________________
Worksheet – Ecology Practice 1
Date: _______HW#____
Mr. Jensen/Period: ___
Ecology Practice
A food web is shown below. The arrows refer to energy flow, and are always pointing
towards the organism that is getting the energy (this is also the organism that is eating the
other organism). Refer to the food web to answer the questions that follow.
Worksheet – Ecology Practice 1
1. List the producers, consumers and decomposers shown in the food web.
producers
Phytoplankton
consumers
Zooplankton, Salmon,
Cephalopod, Sand
Lance, AukletGull,
Kittiwake, Puffin, Rat,
Fox
decomposers
Decomposers
2. List the autotrophs found in the food web
Phytoplankton
3. List the heterotrophs found in the food web
Zooplankton, Salmon, Cephalopod, Sand Lance, AukletGull, Kittiwake, Puffin, Rat,
Fox, and Decomposers
4. Remove the fox from the food web. How many other organisms are affected?
Explain.
Eventually all of the organisms would be affected by this change until the system
could obtain a balance again. BUT…

Removal of the Fox directly causes
1. Increase in the populations of Puffins, Kittiwake, and Rats
Name: ____________________
Worksheet – Ecology Practice 2
Date: _______HW#____
Mr. Jensen/Period: ___
Ecology Practice
A food web is shown below. The arrows refer to energy flow, and are always pointing
towards the organism that is getting the energy (this is also the organism that is eating the
other organism). Refer to the food web to answer the questions that follow.
Worksheet – Ecology Practice 2
1. List the producers, consumers and decomposers shown in the food web.
producers
Oak Tree, Pine tree
consumers
decomposers
Mouse, salamander,
Bacteria, Fungi
Snake, Pine Borer, Redtailed Hawk, Goldencrowned Kinglet
2. List the autotrophs found in the food web
Oak Tree, Pine tree
3. List the heterotrophs found in the food web
Mouse, salamander, Snake, Pine Borer, Red-tailed Hawk, Golden-crowned Kinglet,
Bacteria, Fungi
4. Remove the golden crowned kinglet from the food web. How many other organisms
are affected? Explain.
Eventually all of the organisms would be affected by this change until the system
could obtain a balance again. BUT…

Removal of the Golden-Crowned Kinglet directly causes
1. Decreases in the populations of Snake and Red-tailed
hawk
2. Increase in the population of Pine Borer
Name: ____________________
Worksheet – Ecology Practice 3
Date: _______HW#____
Mr. Jensen/Period: ___
Ecology Practice
A food web is shown below. The arrows refer to energy flow, and are always pointing
towards the organism that is getting the energy (this is also the organism that is eating the
other organism). Refer to the food web to answer the questions that follow.
Worksheet – Ecology Practice 3
1. List the producers, consumers and decomposers shown in the food web.
producers
Grass, Shrub, Tree
consumers
Squirrel, Grasshopper,
Rabbit, Deer, Insecteating Bird, Shrew,
Snake, Hawk, Mountain
Lion
decomposers
Fungi, Bacteria
2. List the autotrophs found in the food web
Grass, Shrub, Tree
3. List the heterotrophs found in the food web
Squirrel, Grasshopper, Rabbit, Deer, Insect-eating Bird, Shrew, Snake, Hawk, Mountain
Lion, Fungi, Bacteria
4. Remove the grasshoppers from the food web. How many other organisms are
affected? Explain.
Eventually all of the organisms would be affected by this change until the system
could obtain a balance again. BUT…

Removal of the Grasshopper directly causes:
1. Decreases in the populations of Shrew and Insect-eating
birds
2. Increase in the population of Grass, and Shrubs