Lesson 1.1

• Biologie
• Middelbare school
• vwo
• Leerjaar 4

Ecology

Biosphere

Biosphere

Biomes

Biomes

Ecosystem

Ecosystem

Community

Community

Habitat

Habitat

Environment

06:21

Autotrophs

Heterotrophs

Consumer

Producer

Carbon from organic matter

Carbon from inorganic matter

Animals

Plants

Feeding relationships

• Autotrophs: producers
• Heterotrophs: consumers

Food chain

• Each step is a trophic level
• Arrows represent energy transfer

Food web

• Show all feeding 
  relationships
• Trophic level can
  depend on food chain
  you focus on. 
  Example: rattlesnake
  can be secondary or
  tertiary consumer

Producer

Primary consumer

Secondary consumer

Tertiary consumer