IB Biology HL 4.3.3 Boreal forest tipping point Question Bank
Practise IB Biology HL 4.3.3 by analysing climate-driven feedbacks that can push boreal forests toward a tipping point.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Analyse how warming, drought and wildfire interact to destabilise boreal forest systems.
- Evaluate feedback evidence for a climate-driven transition toward a boreal-forest tipping point.
D4.3.3—Boreal forest tipping point question 1
[Maximum number: 2]
An increase in global temperatures poses a critical threat to boreal forests. Explain the consequences of climate change to this northern ecosystem.
a. higher temperatures so more transpiration/droughts/dehydration/water shortage
b. more forest fires
c. more/new pests/diseases because of the changed conditions
d. competition from trees/plants «that colonize/spread to boreal forests»
e. trees/«named» organisms «of boreal forests» not adapted to warmer conditions OR
trees/«named» organisms migrate/change their distribution due to warmer conditions
f. trees die so loss of habitat for animals
g. faster decomposition/nutrient cycling «so conditions in the ecosystem change»
h. standing water/floods due to more snow/permafrost melting
2 max
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