Ecosystems Quiz

There are commercial fishermen that are catching a large amount of Red Cod. How will catching large amount of Red Cod affect the marine ecosystem?

• If too many Red Cod are taken out of the ecosystem, the sea bird, another competing consumer, population would also go down.

• If too many Red Cod are taken out of the ecosystem, the predator, the dolphin, population would also go down.

• If too many Red Cod are taken out of the ecosystem, the phytoplankton, the producer, population would also go down.

In an arctic ecosystem, a disease killed many of the hares. Which of the following is most likely to occur after this happens?

• The number of Snowy Owls will decrease.

• The plant population will decrease.

• The insect population will stay the same.

Use the picture to help answer the question. What would happen to the community if the tallest shrubs were cut down?

• The consumers in the community that depend on the trees will have to find another producer that will meet their needs.

• The consumers in the community that depend on the trees will begin depending on other decomposers to meet their needs.

• The consumers in the community that depend on trees would decrease since they would not have anything to eat.

A wide-spread forest fire burned down most of the eucalyptus trees. How would this affect the community?

• The community would remain unaffected. There is still another producer that the consumers can all eat.

• The koala population would also go down because they would have no food to eat, but the rest of the ecosystem will be unaffected.

• The koala population would also go down because they would have no food to eat, therefore, also decreasing the dingo population since they would have less koalas to eat.

The table shows the basic needs of a sparrow. Which environmental change would be harmful to the survival of a sparrow?

• Prairie dogs digging tunnels in the ground.

• Beavers building a dam to create a pond.

• Humans cutting down trees to build houses.