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Difficulty: MediumBasic Ecological Concepts and Ecosystem Structure

In a tropical savanna river valley, two bird species live within the same geographic locality. The Cattle Egret feeds primarily on terrestrial insects disturbed by grazing mammals, whereas the African Fish Eagle hunts aquatic fish from the river. Which of the following ecological terms best describes the distinct functional roles and resource utilization patterns of these two species?

  1. Ecological nichesAnswer
  2. B
    Primary ecological successions
  3. C
    Trophic levels of saprotrophs
  4. D
    Inverted energy pyramids

Answer

The distinct functional roles and resource utilization patterns of the two bird species represent ecological niches.
The correct answer emphasizes that an ecological niche encompasses an organism's role, dietary preferences, and interactions with biotic and abiotic resources in its environment. While both birds share the same physical habitat (the river valley), their different prey choices and feeding methods allow them to occupy separate ecological niches without competing directly.

Step-by-Step Solution

1
Identify the ecological concept being described in the scenario
The stem describes how two species in the same habitat exploit different food sources and behave differently.
Habitat defines where an organism lives, whereas ecological niche defines how it lives and functions, including its dietary habits.
2
Distinguish between habitat and ecological niche
Both birds share the same river valley habitat, but the Cattle Egret occupies an insectivorous terrestrial niche while the African Fish Eagle occupies a piscivorous aquatic niche.
Resource partitioning reduces direct competition between species coexisting in the same habitat.

Key Concept

Ecological Niche vs Habitat
Estimated Time:1m 0s
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Topics

Basic Ecological Concepts and Ecosystem Structure

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