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Question 20N.3.SL.TZ0.12d

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Date November 2020 Marks available [Maximum mark: 2] Reference code 20N.3.SL.TZ0.12d
Level SL Paper 3 Time zone TZ0
Command term Suggest Question number d Adapted from N/A
d.
[Maximum mark: 2]
20N.3.SL.TZ0.12d

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.

(d)

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.

 

[2]

Markscheme

a. the realized is the actual niche and the fundamental is in the absence of competition;

b. with no competition the D. castanea would have a larger habitat/more food
OR
D.castanea could occupy the niches currently occupied by the other warbler species;

Accept named species.

Examiners report

Weaker candidates gave incomplete or confused suggestions in differentiating between the realised and fundamental niche.

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