1. Ecosystems and Biomes
Chapter 23
Section One

2. Energy Flow in Ecosystems
Energy Roles
Producer
Consumer
Decomposer

3. Producers Organism that can make its own food is called a producer.
Examples: Plants, Algae, and Bacteria

4. Consumer
Organisms that obtain energy by feeding on other organisms.

5. Consumers are classified in three categories!!!!
Herbivores
Carnivores
Omnivores
Eat only plants
Eat only animals
Eats both plants and animals

6. Scavengers
Some carnivores that feed on the bodies of dead organisms are called Scavengers.

7. Decomposers
Organisms that break down wastes and dead organisms and return the raw materials to the environment.

8. Food Chains and Food Webs
The movement of energy through an ecosystem can be shown in diagrams called food chains and food webs.

9. Food Chain or Food Web

10. Energy Pyramids
A diagram that shows the amount of energy that moves from one feeding level to another in a food web.

11. Energy Pyramids
The most energy is available at the producer level. At each level in the pyramid, there is less available energy than at the level below.

13. Energy Energy Third Level Consumers Second Level Consumers Producers
First Level Consumers
Energy