4.5 Food Chains & Webs

4.5a Food Chains

http://www.youtube.com/watch?v=df9YZUjSRJw&feature=related

4.5b Food Webs

http://www.youtube.com/watch?v=RQwZjfONqyQ&feature=related

• Food chain - Links producer to the primary consumer etc.
• 1 organism  per trophic level
• Cannot show organisms being omnivore and feeding of more than 1 organism
• Shows flow of matter and energy

• Food web - shows better view of the ecosystem
• Shows the feeding between the communities in the ecosystem
• Different Tropic levels
• Multiple predators
• Multiple prey
• Linked
• Producer (Grass) > Primary consumers (Small herbivorous) > Secondary (Small birds) >Tertiary (Large birds)