Lesson 5 “Intro to Ecology”

Get out of the chain and into the web

Food Chains, Webs, and Pyramids

Turn to your partner…

1) What is another word for a producer?

2) What is a land and water example?

3) What is another name for a consumer?

Producer, Consumer, or Consumer Produce?

When you eat corn on the cob, what type of consumer are you?

a) Primaryb) Secondary c) Tertiary

When you eat corn on the cob, what type of consumer are you?

a) Primaryb) Secondary c) Tertiary

When you eat steak, what type of consumer are you?

a) Primaryb) Secondary c) Tertiary

When you eat steak, what type of consumer are you?

a) Primaryb) Secondary c) Tertiary

Remember-The arrow

points to the Eater!!!

Food Webs

Let’s analyzeImpacts…

What do the arrows represent?

Reviewing a bit . . . Turn to your partner

1) What do the arrows represent?2) What does a food web tell us?

Turn to your partner and answer this question…

Question: How can it be that the energy used for moving your arm indirectly comes from the sun?

?

Turn to your partner and answer this question…

“What limits the length of a food chain?”

• What happens to energy that isn’t used when when it is eaten?

a. “Lost” in fecesb. “Lost” as heatc. “Lost” in translationd. ‘a’ and ‘b’ only

Turn to your partner and explain…

Question: Why is there always more producers than consumers, and always more 1st level consumers than 2nd level consumers.

Ecological “Pyramids”

1) What is the efficiency?

2) In terms of population, what are there the most of? Why?

3) Where is there the most biomass?