Warm up… Arrange the following organisms to show who eats whom: – killer whale – cod fish –...
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Transcript of Warm up… Arrange the following organisms to show who eats whom: – killer whale – cod fish –...
Warm up…
Arrange the following organisms to show who eats whom:– killer whale– cod fish– krill shrimp– algae– leopard seal
Warm up…continued
What might happen to the other organisms if algae were removed from this group?
What might happen if the killer whales were removed?
Are there any organisms in this group that eat more than one kind of food?
Energy Flow in Ecosystems
All organisms play a role in their ecosystem:
Producer (aka: Autotroph [self-feeder])– Make their own food (usually through
photosynthesis) Ex: plants (even the Venus Flytrap!)
All organisms play a role in their ecosystem:
Consumers (aka: Heterotrophs [different feeders])– Can’t make its own food– Gets energy from eating other organisms
1. Herbivores – eats plants
2. Carnivores – eats animals
3. Omnivores – eats plants & animals• Scavengers – eats dead plants & animals
All organisms play a role in their ecosystem:
Decomposers– Break down waste and dead organisms to return
raw materials to the environment Ex: bacteria, fungi, worms
A world with no decomposers?
Producer or Consumer?
Venus flytrap – producer
Fly - consumer
Producer or Consumer?
Consumer (herbivore)
Producer or Consumer?
Producer
Producer or Consumer?
Consumer (omnivore)
Producer or Consumer?
Consumer (carnivore)
Food Chains
Energy enters an ecosystem as…
SUNLIGHT!!!
Food Chain
Food chain – a diagram that shows how energy in food flows from one organism to another.
Order of the food chain:1. Sun – energy source2. Producer3. 1st Level (Primary) Consumer – eats producers (herbivore
or omnivore)4. 2nd Level (Secondary) Consumer – eats 1st level
consumers (carnivore or omnivore)5. Decomposer – recycles materials for use by producers
Arrows show the direction of the flow of energy!
Food webs
Most organisms do not eat the same thing every day, so they are part of more than one food chain.
Food web - a diagram that shows the feeding relationships between organisms in an ecosystem
Food Web
Food webs What happens if we remove an organism?
Summary
3 – What are the three roles that organisms play in an ecosystem. Describe each.
2 – What are two examples of a decomposer?
1 – Create a food chain that includes & ends with you.
Energy & Matter
Flow of energy
When an organism eats, it obtains energy, then uses a lot of energy in life process like growth and movement.
This means that only part of their energy is available to the next organism in the food web.
Energy Pyramid
Energy pyramid - a diagram that shows an ecosystem’s loss of energy
What is the purpose?– To show the amount of energy that moves from one
feeding level to another in a food web– Facts:
The greatest amount of energy is available at the producer level
The least amount of energy available to going to be a the top of the food chain.
Energy Pyramid Video Clip
Energy Pyramids
Energy Pyramid
Energy Pyramid Model
1. Follow my directions to make the pyramid.
2. The following information should be on each side of your pyramid:– Side 1: “Key” for an Energy Pyramid– Side 2: Food Chain with 3 levels of consumers– Side 3: Energy Pyramid for your Food Chain
Side 1: Key for an Energy PyramidLabel each level with the type of organism (producer, 1st level consumer, etc.) and amount of energy.
Producers
1st Level or Primary Consumers
1000 kcal
100 kcal
10%
10 kcal
10%
1 kcal
10%
2nd Level or Secondary Consumers
3rd Level or Tertiary Consumers
Side 2: Food Chain
Illustrate a food chain that includes 3 levels of consumers.
? ? ? ?
Food Chain:
Side 3: Energy Pyramid for your Food Chain
Illustrate an energy pyramid for your food chain.