Multiple Choice
In which ocean zone do you find ecosystems that are abundant with plants and/or seaweeds?
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48. Ecology
Introduction to Aquatic Biomes
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Which of the following organisms would most likely be found at the base of an aquatic food pyramid?
A
Zooplankton
B
Small fish
C
Sharks
D
Phytoplankton
Verified step by step guidance1
Understand the concept of a food pyramid: A food pyramid represents the flow of energy in an ecosystem, starting with primary producers at the base, followed by primary consumers, secondary consumers, and so on.
Identify the role of phytoplankton: Phytoplankton are microscopic organisms that perform photosynthesis, converting sunlight into chemical energy. They are primary producers in aquatic ecosystems.
Compare the roles of the listed organisms: Zooplankton are primary consumers that feed on phytoplankton, small fish are secondary consumers that feed on zooplankton, and sharks are tertiary consumers at the top of the food chain.
Recognize the position of phytoplankton in the food pyramid: Since phytoplankton produce energy through photosynthesis and serve as the foundation for all other organisms in the food chain, they are found at the base of the aquatic food pyramid.
Conclude that phytoplankton are essential for supporting higher trophic levels: Without phytoplankton, energy would not be available to sustain zooplankton, small fish, sharks, and other organisms in the ecosystem.
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