Multiple Choice
In a typical marine food chain, which trophic level does the yellowfin tuna (Thunnus albacares) primarily occupy?
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48. Ecology
Introduction to Ecology
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In an ecosystem, which group of organisms is primarily responsible for breaking down organic material and recycling nutrients?
A
Primary consumers
B
Producers
C
Decomposers
D
Predators
Verified step by step guidance1
Understand the role of decomposers in an ecosystem: Decomposers are organisms, such as fungi and bacteria, that break down dead organic material into simpler substances. This process releases nutrients back into the soil, making them available for producers (like plants) to use.
Differentiate between the groups of organisms listed: Primary consumers are herbivores that feed on producers (plants). Producers are autotrophs, such as plants and algae, that create their own food through photosynthesis. Predators are organisms that hunt and consume other animals.
Recognize that decomposers are unique in their role: Unlike the other groups, decomposers do not consume living organisms or produce their own food. Instead, they specialize in breaking down dead material and recycling nutrients.
Connect the process to nutrient cycling: Decomposers play a critical role in maintaining ecosystem health by ensuring that essential nutrients, such as nitrogen and phosphorus, are returned to the environment for reuse by producers.
Conclude that decomposers are the correct answer: Based on their function of breaking down organic material and recycling nutrients, decomposers are the group primarily responsible for this role in an ecosystem.
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