Fall 2025: Community Ecology Review

Predators, food, and bacterial disease are examples of ______ limiting factors

• Abiotic

• Biotic

• Are not examples of limiting factors

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Fires, Air, and Global Temperatures are examples of ______ limiting factors

• Abiotic

• Biotic

• Are not examples of limiting factors

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The difference between a food chain and a food web is that

• a food chain shows all the eating interactions between organisms in a community

• a food web shows all the eating interactions between organisms in a community

• there is no difference between a food chain and a food web

Within a food chain matter and energy

• are used and reused by different organisms

• are created by different organisms

• are deystroyed by different organism

• are not used by organisms

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How does matter and energy differ as you move up a trophic pyramid?

• Matter will increase, while energy will decrease

• Matter will decrease, while energy will increase

• Matter will decrease, while energy will decrease

• Matter will increase, while energy will increase

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How much energy moves from one trophic level to the next?

• Only 10% can be passed up, because 90% is used by the organism for normal life processes

• Only 30% can be passed up, because 70% is used by the organism for normal life processes

• 90% can be passed up, because 10% is used by the organism for normal life processe

• There is not a loss of energy as you move up a trophic pyramid

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When an rabbit eats grass, the grass is used for energy and the matter is turned into? (Select All Right Answers)

• parts of a fox (fur, muscles, fat, etc.)

• parts of the rabbit (fur, muscles, fat, etc.)

• waste

• No matter is consumed

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What would happen if instead of 10% energy only 5% energy moved up the food chain?

• Secondary and tertiary consumers would experience an energy surplus, potentially leading to overpopulation and ecosystem imbalances.

• Apex predators would face a scarcity of energy, resulting in them increasing their population size and potential extinction risks.

• The efficiency of energy transfer between trophic levels would decrease, impacting the stability and functioning of the entire food web.

• There would be no change to the food web

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What trophic level will have the SMALLEST population do to the amount of energy that is passed up a food chain?

• Producer

• Primary Consumer

• Secondary Consumer

• Tertiary Consumer

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What trophic level has to be the LARGEST because it supports all the other levels?

• Producer

• Primary Consumer

• Secondary Consumer

• Tertiary Consumer

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