Effects of Changes in Ecosystems

Natural disasters can also change ecosystems. What can organisms do if a disaster happens?

• Fight, Survive, Struggle

• Move, Adapt, Die

• Stay, Sleep, Survive

• Eat, Sleep, Repeat

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How does a bird "change its environment" to meet its NEEDS?

• builds a nest
• flies around
• catches bugs
• looks for something to eat

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6. A squirrel makes a change to its environment when it —

• climbs a tree
• digs a hole to bury an acorn
• collects acorns
• jumps from tree to tree

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Which of the following would have a negative impact on an ecosystem

• constructing highways
• planting trees
• recycling paper

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How would building a highway affect an ecosystem?

• saltwater pollutes fresh water
• marine life is threatened
• it would not change the ecosystem
• animals cannot travel through their ecosystem the same

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What is a drought?

• Not enough rain
• Too much rain.
• Too much people using water
• Strong winds

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What would cause a decrease in the rabbit population?

• An increase in grass growing
• A decrease in caterpillars
• An increase in owls
• An increase in fox

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Which of these populations is most likely to decrease if the number of grasshoppers decreases?

• plants
• frog
• praying mantis
• owl

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An example of a natural change to the ecosystem is:

• A highway built in the middle of the desert. 
• Lightening strikes and starts a fire in the forest. 
• A rancher placing too many grazers in a small area leading to overgrazing.

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The removal of trees and plants can cause problems such as soil erosion. 

• True
• False

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