4.5 a) Understand the concepts of food chains.
The food chain links the producer to the primary consumer to the secondary consumer and finally to the tertiary consumer
There is 1 organism per trophic level
Notice: in a food chain you cannot show an organism which is omnivore or an organism that's feeding 2 or more trophic levels.
Food chains show the flow of matter and the flow of energy.
b) Understand the concepts of food webs
Food webs allow us to provide a better description of the ecosystem.
The interaction the food web describes is feeding.
It allows us to show the organisms that are feeding at different trophic levels.
Feeding at different trophic levels has a number of consequences.
1. organisms can have multiple predators.
2. Feeding on multiple prey.
3. Food chain being linked
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