IB ESS HL 2.5.1 Zonation Definition Questions

Identify zonation, relate named vegetation to environmental gradients and explain how changing abiotic conditions shape communities.

Exam points

identify zonation or a named altitudinal pattern from a vegetation or community figure
identify or outline a relationship between an environmental gradient such as altitude and the distribution of named vegetation or communities
explain changes in zonation by linking the gradient to changing abiotic conditions and species tolerances
interpret a quantified relationship between an environmental gradient and an abiotic or community variable, including a peak, trend or exception

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Study 2.5.1—Zonation definition conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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Figure:Vegetation map of New Zealand

Key:

Figure:Topographic map of New Zealand

With reference to Figures: Topographic map of New Zealand and Vegetation map of New Zealand, identify a relationship between altitude and type of vegetation.

a. Low/lower altitude is associated with bog/swamp/grass steppe/shrub steppe/subtropical laurel forest/subtropical rainforest/temperate broadleaf forest;
b. High/higher altitude is associated with alpine shrubland/highland steppe/temperate rainforest;
c. Mid/middle altitude is associated with temperate rainforest/temperate broadleaf forest;
d. Low/lower altitudes are associated with subtropical forests / mid/middle altitudes with temperate forests / high/higher altitudes are associated with grasslands;
e. The higher the altitude, the more grass steppe there is;
f. Zonation;

Note to examiners: accept any other reasonable responses. Do not accept just "steppe" or "rainforest", it must be specifically named for the appropriate altitude. Do not accept responses which simply state at which height range a specific vegetation type is located (e.g. Temperate broadleaf forest is located at $1000 \mathrm{~m}-1249 \mathrm{~m}$ ) as this is not a relationship.

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IB ESS HL 2.5.1 Zonation Definition Questions question 1