There are two main types;

1. Terrestrial ecosystem:

            These are ecosystem which are found on land e.g. forest, grassland, underground (under a stone or rock)

2. Aquatic ecosystem:

              These are ecosystems which are found in water. There are of two types;

1. Fresh water ecosystem e.g. lake or pond
2. Marine ecosystem e.g. seas

Each member in an ecosystem has a function, they are;

1. Producers: they produce their own food e.g. plant
2. Consumers: they feed on plant/grass and other organisms. They are:

1. Herbivores; these are animals that feed on grass e.g. goat, sheep, cow etc
2. Carnivores; these are animals that feed only on flesh e.g. lion
3. Omnivores; these are animals that feed both on grass and flesh e.g. man

3. Decomposers: they break down waste to produce nutrients that get back of the environment e.g. micro organisms
4. Scavengers: these are animals that feed on dead plants and animals e.g. earth worms etc