Analyzing Changes to Food Webs

Front

If mice were removed from this ecosystem, what would be expected to occur? Options: a decrease in the cricket population, a decrease in the corn population, a decrease in the hawk population, a decrease in the moth population.

Back

a decrease in the hawk population

Front

What would cause a decline in the lizard population? Options: a decrease in the cricket population, an increase in the corn population, a decrease in the mice population, an increase in the moth population.

Back

a decrease in the cricket population

Front

A decrease in which population would have the greatest effect on the rest of the organisms in this ecosystem? Options: hawks, corn, crickets, birds.

Back

corn

Front

Producers in this ecosystem: Humpback whales, Sea turtles, Phytoplankton, Sharks

Back

Phytoplankton

Front

What could be a long-term result of reducing the herring population in this ecosystem?

Back

a decrease in the shark population

Front

Result of increasing the krill population in this ecosystem?

Back

an increase in the jellyfish population

Front

Overhunting of humpback whales would result in which of the following changes to this ecosystem?

• a decrease in the puffin population
• an increase in the population of krill
• an increase in the phytoplankton population
• increased competition between top predators

Back

an increase in the population of krill

Front

A decrease in the population of sharks due to poaching would cause which factor to immediately increase for the puffins?

Back

Competition

Front

A reduction in the population of mice in this food web could cause which of the following changes to occur? Options: a decrease in the grass population, an increase in the snake population, an increase in the grasshopper population, a decrease in the grain population.

Back

an increase in the grasshopper population

Front

Insecticides are used by a farmer to decrease the grasshopper population in this area. This reduction in the grasshopper population would also cause which set of changes?

Back

The grain population to increase and the frog population to decrease.