Energy Flow Through Ecosystem

Energy Flow through

Ecosystem

Biology - Unit 3: Energy Flow - Concept 3

All energy comes on Earth comes from the Sun.

So how do we get our energy?

Open Ended

Where do we as humans get our energy?

Ways of Getting Energy

●

Producers
○

Also called autotrophs

○

Get energy from
nonliving sources

○

Most capture energy
during photosynthesis
to make simple sugars

○

Examples =

●

Consumers
○

Also called
heterotrophs

○

Get their energy from
living or once-living
organisms

○

Examples =

Multiple Choice

Are people Consumers or Producers?

• Producers

• Consumers

How Producers Get Their Energy

Multiple Choice

Chemosynthesis uses what for a source of energy?

• Tacos

• The Sun!

• Carbs

• Chemicals

How Consumers Get Their Energy

●

Consumers eat other organism to get energy

●

Then they breakdown the macromolecules inside of them to release
ATP in a process called cellular respiration.

●

4 Types of Consumers:
○

Herbivores
■

Eat only vegetation

○

Carnivores
■

Eat only meat

○

Omnivore
■

Eat meat and vegetation

○

Detritivores (decomposers)
■

Eat dead materials

Match

Match the following

• Detritivores (Decomposers)

• Herbivores

• Carnivores

• Omnivore

Eat dead materials

Only eats vegetation

Meat Eaters

Meat and Veggies

• Eat dead materials

• Only eats vegetation

• Meat Eaters

• Meat and Veggies

Open Ended

What process do consumers use to get ATP?

Multiple Choice

In what organelle does Cellular Respiration occur?

• Lysosome

• Chloroplast

• Mitochondria

• Smooth ER

Food Chains

●

Food chains trace a single flow of energy and show trophic
levels = the levels of nourishment in a food chain

Rule of 10

●

As energy flows from organism to organism, it is used for
metabolism and/or converted to heat

●

Because of this, the next organism on the chain only receives
10 PERCENT of the energy obtained in the previous level
○

The other 90% is used or “lost” as heat

Fill in the Blanks

What percentage of energy is lost as heat

Trophic Levels

Reorder

Reorder the following to show the flow of energy

• Producers

• Primary Consumers

• Secondary Consumers

• Tertiary Consumers

1

2

3

4

• 1
• 2
• 3
• 4

Food Webs

●

Shows multiple food chains at once, and how they interconnect.

Trophic Pyramids

= models that show how energy flows through an ecosystem

●

Energy Pyramid: represents the energy available at each
trophic level; levels ALWAYS get smaller as you up the pyramid
(Remember the Rule of 10!)

●

Numbers Pyramid: represents the number of organisms at
each trophic level; since energy decreases as you go up the
pyramid, fewer organisms can be supported

●

Biomass Pyramid: represents the total mass of living organic
matter at each trophic level

Labeling

Match types of consumers with their spot of the pyramid

Drag labels to their correct position on the image

Decomposer

Secondary Consumer

Primary Consumer

Producers

Tertiary Consumer

Multiple Choice

As organisms move up the food chain does their population go up or down?

• Population Increases

• Population Decrease

Labeling

Place the Percentage at the correct stage of the Pyramid

Drag labels to their correct position on the image

10%

0.1%

1%

100%