IB Biology SL A4.2.5 Evidence for Biodiversity Crisis Questions
Analyse pollution gradients, species richness and evidence quality when evaluating the biodiversity crisis.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Analyse biodiversity-crisis evidence by linking a pollution gradient to reduced species richness and loss of species.
IB Biology SL A4.2.5 Evidence for Biodiversity Crisis Questions question 1
The sinking of the tanker Eurobulker off the coast of Greece in September 2000 resulted in a spill of 700 tonnes of crude oil. The sands in the oil spill region were categorized according to the level of pollution and the presence of indicator species.
The graph shows the trends in richness of all species in the five ecological quality status categories in sands after the oil spill.
Analyse the data to show that pollution affects biodiversity.
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