Multiple Choice
Which statement best explains the relationship between gross primary production (GPP), net primary production (NPP), and energy conversion in an ecosystem?
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52. Ecosystems
Energy Flow Through Ecosystems
Multiple Choice
An ecological pyramid can depict the flow of which of the following between successive trophic levels?
A
Carbon dioxide
B
Water
C
Energy
D
Minerals
Verified step by step guidance1
Understand the concept of an ecological pyramid: An ecological pyramid is a graphical representation that shows the relationship between different trophic levels in an ecosystem. It can depict energy flow, biomass, or the number of organisms at each level.
Clarify the flow of energy: Energy is transferred from one trophic level to the next, starting with producers (plants) that capture solar energy through photosynthesis. This energy is then passed on to primary consumers (herbivores), secondary consumers (carnivores), and so on.
Explain why energy is depicted: Energy flow is unidirectional and decreases as it moves up the trophic levels due to energy loss as heat, respiration, and other biological processes. This makes energy the most suitable metric for an ecological pyramid.
Address why other options are incorrect: Carbon dioxide and water are part of biogeochemical cycles, not directly represented in ecological pyramids. Minerals are also cycled in ecosystems but are not depicted in the pyramid structure.
Conclude with the correct answer: The ecological pyramid specifically depicts the flow of energy between successive trophic levels, as energy transfer is a fundamental aspect of ecosystem dynamics.
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