IB Biology SL 4.1.12 Fundamental and Realized Niches Question Bank

Practise IB Biology SL 4.1.12 by distinguishing potential and realized niches and explaining how competition restricts the niche a species occupies.

Exam points

Distinguish fundamental niche as potential conditions from realized niche as actual conditions.
Explain how competition and resources restrict a species from its full fundamental niche.

[Maximum number: 2]

12. 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 B4.2.12—Fundamental vs. realized niche question 1 — IB Biology SL

The diagram shows the realized niches of the five species of warbler. Suggest how the fundamental niche of D. castanea might differ from its realized niche.

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B4.2.12—Fundamental vs. realized niche question 1