interconnectedness

These two species of birds, the egret and heron, eat the same types 

of fish as their maindiet. They live in the same ecosystem. 

How would the egrets in this area MOST LIKELY respond if all of the herons were removed from the area?

• They would move to different ponds.

• They would change to another diet.

• They would build fewer nests.

• They would have an increase in population.

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The diagram shows a grassland food web. 

The grassland ecosystem is experiencing a drought where very little 

rain has fallen for many years. 

How would the organisms in the grassland ecosystem be affected 

by the drought?

• There would be fewer shrubs 

  and there would be more deer.

• There would be fewer numbers of 

  each type of organism.

• There would be more numbers of 

  each type of organisms.

• There would be fewer hawks and 

  there would be more mice.

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Rain forests normally receive a lot of rain. Which of the following is MOST LIKELY to happen to the plants in a rain forest during a severe drought and which organism might this affect?

• The plants will wilt and may die. Herbivores may have less food.

• The plants will quickly adapt. Herbivores may have more food.

• The plants will grow taller. Carnivores

  may have more food.

• The plants will sprout new leaves. Carnivores may have more food.

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Look at the desert food web.

What organism will possibly die out if the feather grass were removed from the desert?

• Jackrabbit

• Grasshopper

• Desert tortoise

• Desert fox

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What might happen if you remove a primary consumer from the ecosystem?

• There would be more food for secondary consumers.
• The number of primary consumers would increase.
• The number of plants would increase.
• The number of secondary consumers would increase.

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Using the food web what would happen if the eagle became extinct?

• The frog population would decrease.

• The frog population would increase.

• The butterfly population would increase.

• The snake population would decrease.

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Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

• There would be a decrease in the small bird population.

• There would be a decrease in the grass/flowers population.

• There would be a decrease in the mice population.

• There would be an increase in the grass/flowers population.

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If the glue crab perished, what impact or effect the food web will have?

• The population of Herring gull and otter will increase.

• The population of grass shrimp and periwinkle will increase.

• The population of Cord grass will increase.

• The population of the diamondback will increase.

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In this food web, what would happen if the amount of grains available decreased?

• The mice population would decrease

• There would be no change

• The bird population would increase

• The owl population would decrease

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Which change would most likely occur if all the producers in this ecosystem were removed?

• The populations of consumers would increase

• the producers would move to a new location

• to populations of consumers would decrease

• Pacus would become producers.

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