4.5a: Food chain & 4.5b: Food webs

• Producer -> Primary Consumer -> Secondary Consumer -> Tertiary Consumer

• Only one organism per trophic level
• In a food chain you cannot show an animal as an omnivore (eating at more than one level)
• food chains show the flow of matter and energy

• provides us with a better description of the ecosystem (in this case, feeding)
• Can show feeding at different trophic levels. This can have consequences:
- multiple predators
- feeding on multiple prey
-results in food chains being linked