IB Biology SL D4.2.4 Mesocosm Model Questions

Use controlled mesocosms to model ecosystem stability. In a closed bottle, matter stays inside while light energy can enter.

Exam points

Explain mesocosm advantages for ecological studies, including controlled variables and easier measurement, and compare the model with natural conditions.
Describe how to set up and control a mesocosm, including starting conditions, suitable organisms and light.
Distinguish matter from energy exchange in a closed mesocosm and interpret which variables can change in a terrestrial model.
Use continuous waste recycling as evidence that a sealed mesocosm remains sustainable over time.

[Maximum number: 1]

Which is not essential in a viable mesocosm?

Light source

Autotroph

Saprotroph

Herbivore

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