FOOD CHAIN AND FOOD WEB

Food chain:

• It ilustrates how energy and nutrients move from one organism to another. 
• Shows transfer of energy from one thropic level to another. 
• Show how matter and energy move trought an ecosystem. 

Food web: 

• Complex network of interconected food chains. 

There are: 

• Grazing food web 
• Betritial food web 

Key word_____ THROPIC LEVEL: Position that an organism occupies in a food chain.

Thropic levels:

• Producers
• Primary consumers
• Secondary consumers 
• Tertiary consumers
• Quaternary consumers