1.2.18—Human impacts on resilience

Syllabus
First assessment 2026
Objective
1.2.18
Level
HL

Removing Storage and Diversity Removes Options

Human actions lower resilience when they shrink storages or biological diversity, leaving fewer reserves and alternative pathways after disturbance.

Trace action → reduced storage/diversity → larger proportional shock → slower recovery or tipping risk. Restoration can reverse the mechanism.

Deforestation removes biomass and seed stores and fragments habitat, so drought or fire has a larger effect than in a connected diverse forest.

Rebuilding diverse habitat and reserves restores alternative pathways; one species may not.

Human influence is not automatically resilience loss; identify the storage or diversity mechanism.