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IB Biology SL B4.2.1 Ecological Niche Questions

Explore ecological niche as a species’ role and mode of existence, then compare diet, activity, predators and resource use in IB Biology SL B4.2.1.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Define an ecological niche as a species’ role or mode of existence, including its spatial habitat, resources and biotic or abiotic interactions.
  • Compare species niches using differences in food, predators, activity timing, breeding or resource use despite similar habitat.

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Study B4.2.1—Ecological niche conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology SL B4.2.1 Ecological Niche Questions question 1

[Maximum number: 2]

Ecologists studied the distribution of five species of insectivorous wood warblers of the genus Dendorica living on different parts of coniferous trees in mature forests.

Figure for Question IB Biology SL B4.2.1 Ecological Niche Questions question 1 — IB Biology SL

Other than position in the tree, suggest two ways in which the niches of the warblers in the ecosystem may differ.
1:
2:

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