IB Biology SL D4.2.1 Stability of Natural Ecosystems Questions
Relate rainfall and temperature to stable desert, grassland and forest ecosystem types.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Use temperature and rainfall examples to identify stable ecosystem types such as desert, grassland and forest.
IB Biology SL D4.2.1 Stability of Natural Ecosystems Questions question 1
[Maximum number: 3]
Primary plant succession has been observed in sand dunes adjacent to the northern end of Lake Michigan, one of the Great Lakes in North America. The youngest sand dunes have beach grass (Ammophila breviligulata) and prairie bunch grass (Schizachyrium scoparium). The oldest dunes have coniferous trees (Pinus strobus and Pinus resinosa).
Outline how the type of stable ecosystem that will develop in an area can be predicted based on climate.
| a | climate is defined by temperature and rainfall |
| b | absence of rainfall/water/humidity leads to desert |
| c | moderate amount of rainfall leads to grassland |
| d | high levels of rainfall leads to forest |
| e | temperature determines type of grassland/forest |
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