Environmental Systems and Societies · Topic 3: Biodiversity and conservation
ES3.2 — Human impact on biodiversity
Environmental Systems and Societies · SL / HL · syllabus-mapped notes
Direct and indirect threats
How direct and indirect human influences reduce biodiversity, and how multiple impacts amplify one another.
Invasive alien species
How invasive species arrive, increase and reduce local biodiversity through competition, predation and disease, with a local example.
The IUCN Red List and conservation priorities
How the IUCN assesses conservation status, and how status publicizes vulnerability and shapes priorities for governments, NGOs and citizens.
Named species and the tragedy of the commons
Three named species case studies and the tragedy of the commons as a model of shared resource overexploitation.
HL: Hotspots, KBAs and conservation conflict
Threats to tropical hotspots, how Key Biodiversity Areas are prioritized, and the conflict between exploitation and conservation.
HL: Indigenous justice and biosphere integrity
Traditional indigenous land management under pressure, environmental justice in conservation, and the biosphere-integrity planetary boundary.