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D4.2.6—Sustainable resource harvesting

Sustainable harvesting removes biological resources no faster than populations can replace them, preserving biodiversity, food-web structure, and long-term ecosystem productivity.

Syllabus
First assessment 2025
Objective
D4.2.6
Level
HL

Exam analysis

Chance of appearing1%of analysed past papers
Latest appearanceMay 2025
Most common paperPaper1B
Typical marks4

Common command terms

  • Discuss

Recent exam appearances

May 2025Paper1B ["HL"] · TZ22(d)[ 4 ]D4.2.6—Sustainable resource harvesting
Practice this objective

Coverage 2025–2025 · Updated 16 Jul 2026

Concept essentials

  • Harvesting is sustainable only when removal stays at or below the population replacement rate.
  • Monitoring population size and biodiversity over time provides evidence for sustainable management.
  • Overfishing can disrupt food webs and reduce biodiversity beyond the target species.
ConceptIB Biology HL