Lorax Review

Sustainable Yield

• Only using enough of a resource to allow the resource can replenish itself within a certain time period.

• Consumers such as bears and wolves will eat only a certain amount of the trophic level below to ensure they have enough for later.

• Maintaining the same level of energy throughout the ecosystem.

• When driving you do not need to come to a complete stop, only ensure no one else is coming.

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If sustainable yield would have been practiced by the Once-ler, what is the most likely result?

• A. There would be an equal amount of air and water pollution as there was without practicing sustainable yield.

• B. There would be a consistent amount of trees harvested per year and planting at least one tree for every harvested tree.B

• C. The Once-ler's business would have made a greater profit in the long run as he could plant a greater amount of trees in the present to be used for Thneeds and sold in the future.

• D. Both B and C

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The number one cause of extinction and species endangerment is

• Commercial Hunting

• Pest Control

• Introduced Species

• Habitat Disruption

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Which of the following is an example of an overlapping niche?

• A dolphin in the ocean that eats fish and a bear in Yellowstone that eats fish out of the river.

• A House Sparrow (bird) building a nest and defending the territory fiercely in an area that Bluebirds typically nest.

• A King Fisher (bird) that dives into the water to eat fish at The Lake of the Ozarks and a Pelican that dives into the Pacific Ocean to eat fish.

• Two organisms of the same species live in Hillsdale State Park.

When one species leaves an ecosystem and there is an effect on at least 2 other trophic levels and even the abiotic factors in the ecosystem, this is called what?

• Trophic Cascade

• Trophic Level

• Extinction

• Stunted Ecosystem

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The ________________ _________________ is the number of organisms of the same species that an area can support without doing harm to the area.

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The average number of individuals in a population per unit area (or volume) is called what?

• Carrying Capacity

• Population Size

• Community

• Population Density

What type of growth curve is represented by this graph?

• Logistic Growth

• Exponential Growth

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What characteristics does the population in this graph have?

• Carrying capacity has been reached.

• Carrying capacity has not yet been reached.

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What type of growth curve is represented by this graph?

• Logistic

• Exponential

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