Energy Flow in Ecosystems

Learning Objectives Trace the flow of energy through living systems. Explain how ecological pyramids show the flow of energy

through trophic levels.

Food Chain

Decomposers and Detritivores

Decomposer Primary producer

Food Webs

Food Webs and Disturbance

Antarctic Food Webs

Pyramid of Energy

Primary producer

First-level consumer

Second-level consumer

Third-level consumer

Heat

Heat

Heat

Heat

100%

10%

1%

0.1%

Pyramids of Biomass and Numbers

Food Web Review