ET Unit 6 Ecology Review - Ecosystem Dynamics

What are the three categories of organisms in an ecosystem based on how they obtain nourishment?

• Producers, consumers, decomposers

• Herbivores, carnivores, omnivores

• Primary, secondary, tertiary

• Photosynthetic, chemosynthetic, detritivores

Which organisms are considered producers?

• Herbivores

• Plants and photosynthetic organisms

• Carnivores

• Decomposers

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What role do decomposers play in an ecosystem?

• Consuming other organisms

• Breaking down dead organisms and waste products

• Producing food through photosynthesis

• Competing for resources

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Which type of organism would a grasshopper be classified as?

• Primary consumer

• Secondary consumer

• Tertiary consumer

• Decomposer

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What is the first trophic level in a food chain?

• Primary consumers

• Producers

• Secondary consumers

• Decomposers

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How does energy flow in an ecosystem?

• Cyclically

• Randomly

• In a one-way direction

• Only through producers

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What is the primary source of energy in all ecosystems?

• Chemical energy

• Kinetic energy

• The sun

• Thermal energy

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What does gross primary productivity (GPP) represent?

• The total energy stored in an ecosystem

• The rate at which energy is captured during photosynthesis

• The energy used by plants for respiration

• The energy available to secondary consumers

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What is an ecological niche?

• The physical environment in which an organism lives

• The role and position a species has in its environment

• The food an organism consumes

• The amount of sunlight an organism needs

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What is the realized niche of an organism?

• The entire area where an organism could live

• The area an organism actually occupies due to competition

• The range of temperatures an organism can tolerate

• The specific food an organism eats