This week the grade 12 biologists constructed a closed hopefully sustainable ecosystem in a bottle. 

We discussed what is required for a sustainable ecosystem including the role of autotrophs, hetrotrophs, detritivores and saprotrophs.

The students made their model ecosystem known as a mesocosm from two water bottles, soil, gravel, a selection of aquatic and terrestrial plants, and invertebrates. 

We will follow the growth and the development of the Mesocosms over the next few months. It is hoped they will continue as sustainable ecosystems until the students finish their last IBDP Biology exam! 

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