ecosystems Archives - Free ZIMSEC & Cambridge Revision Notes

Science: Ecosystems

An ecosystem diagram. Image credit ck12.org ZIMSEC O Level Combined Science Notes: Ecosystems

Is a self-contained system of interdependent organisms and their physical environment
An ecosystem can also be defined as a biological community of interacting organisms and their physical environment.
In an ecosystem a community of living […]

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Impala ecosystem Natural ecosystem. Image credit wordpress.com ZIMSEC O Level Combined Science Notes: Natural Ecosystems

In a natural ecosystem there is close interaction between the plants and animals
The green plants are the producers
The animals are the consumers
There are several levels of consumers
Primary consumers-these eat plants directly
They are also known as herbivores
Secondary […]

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The savannah. Image credit wildnatureinstitute.org ZIMSEC O Level Combined Science Notes: Managing Ecosystems

The ecosystem needs to looked after to ensure it is in balance
Humans can have good or bad effects on the ecosystem
Soil is an especially important component of the Zimbabwean ecosystem because […]

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