Remember Ecosystem, Habitat and Niche? Ecosystem – group of communities interacting with each other and the nonliving parts of their environment Habitat.

Remember Ecosystem, Habitat and Niche?

Ecosystem – group of communities interacting with each other and the nonliving parts of their

environment Habitat – Place where an organism

lives Niche – organisms role or job, in its habitat, often associated with what

it eats.

How do organisms interact with their environment?

Producers and Consumers

• Producers make their own food usually by a process called photosynthesis.

• Consumers obtain food by eating other organisms

Food ChainProducer

Primary consumer

Secondary Consumer

At each level, only about 10 % of the energy that is produced is passed on

Trophic Levels

TertiaryConsumer

Secondary Consumer

Primary Consumer

Producer

In each link of the food chain, only 10% of the energy in the food is transferred to the next level!!

What happens to the

Other 90%?

Energy is lost in heat and carrying out life

processes

Food Chain

Sun

Grass

Deer

Wolf

Food WebOrganisms can eat more than one thing

Arrows point to where the energy is going!