Food Web

Definition: the interlocking of many food chains that are linked together in order to show the different  feeding relationships between organisms present in an ecosystem. The arrows show the transfer of energy from the prey to the predator. Energy transfer is not 100% efficient, only 10% of the energy is passed onto the next energy level. 

https://biomesfourth09.wikispaces.com/file/view/alec_and_julia's_food_web.JPG
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1) Primary Producers (organism that make their own food): Green & Dark Orange Color

2) Primary Consumers (organisms that eat primary producers): Purple Color

3) Secondary Consumers (eat primary consumers): Blue/Orange Color, 

4) Tertiary Consumers (eat secondary consumers): Orange/Yellow Color

These colors are just a rough representation of each feeding level, the organisms present in each trophic level also feed on other trophic levels. The colors just help to give an idea on what is happening at each one.