IB ESS SL 3.2.1 Threats to Biodiversity Questions
Analyse habitat loss, overexploitation, pollution, climate change and other threats to biodiversity.
- Syllabus
- First assessment 2026
- Course
- ESS SL
- Level
- SL
Exam points
- identify major threats to biodiversity, including habitat loss, pollution, overharvesting, invasive species, disease and climate change
- explain how these threats change population size, reproduction, genetic diversity, species interactions and food webs
- explain how species decline and environmental change can reduce biodiversity, productivity, resilience and ecosystem stability
IB ESS SL 3.2.1 Threats to Biodiversity Questions question 1
Figure:Photographs showing examples of species found in Brazil
Golden lion tamarin (Leontopithecus rosalia) IUCN Red List status - endangered
Brazilian merganser (Mergus octosetaceus) IUCN Red List status - Critically endangered
Giant metallic ceiba borer (Euchroma gigantea) IUCN Red List status - none, has not yet been assessed by the IUCN
Figure:Deforestation in the Atlantic Rainforest and the Cerrado
Figure:Photographs showing examples of species found in Brazil
Parana pine: critically endangered. Golden lion tamarin: endangered. Broad-snouted caiman: least concern. Pau brasil: endangered. Brazilian merganser: critically endangered. Giant metallic ceiba borer: not yet assessed by the IUCN.
With reference to the species listed in Figure 4, identify two factors that may have contributed to their status given on the IUCN Red List.
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