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IB Biology HL A4.2.4 Ecosystem Loss Causes Questions

Explain how deforestation, fragmentation and climate or acidification pressures remove habitat and reduce ecosystem biodiversity.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Explain how deforestation and habitat conversion reduce species richness by removing food, shelter and breeding sites.
  • Explain how deforestation reduces biodiversity by removing habitat, food and shelter and increasing population decline.
  • Link rising sea temperature or ocean acidification to coral bleaching, skeleton loss and biodiversity decline on coral reefs.

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Study A4.2.4—Ecosystem loss causes conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL A4.2.4 Ecosystem Loss Causes Questions question 1

[Maximum number: 1]

The satellite images show changes in the area covered by forest, much of which is mixed dipterocarp forest, on the island of Borneo in Southeast Asia.

Figure for Question IB Biology HL A4.2.4 Ecosystem Loss Causes Questions question 1 — IB Biology HL

Which human activities are most likely to have caused the changes shown in the map?

A

Logging and palm oil plantation

B

Logging and rewilding

C

Mining and afforestation

D

Afforestation and palm oil plantation

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