Warm up l Arrange the following organisms to

Warm up… l Arrange the following organisms to show who eats whom: – – – killer whale cod fish krill shrimp algae leopard seal

Warm up…continued l l l 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: l Producer (aka: Autotroph [self-feeder]) – Make their own food (usually through photosynthesis) l Ex: plants (even the Venus Flytrap!)

All organisms play a role in their ecosystem: l Consumers (aka: Heterotrophs [different feeders]) – Can’t make its own food – Gets energy from eating other organisms 1. 2. 3. Herbivores – eats plants Carnivores – eats animals Omnivores – eats plants & animals • Scavengers – eats dead plants & animals

All organisms play a role in their ecosystem: l Decomposers – Break down waste and dead organisms to return raw materials to the environment l 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 l l Food chain – a diagram that shows how energy in food flows from one organism to another. Order of the food chain: 1. 2. 3. 4. 5. l Sun – energy source Producer 1 st Level (Primary) Consumer – eats producers (herbivore or omnivore) 2 nd Level (Secondary) Consumer – eats 1 st level consumers (carnivore or omnivore) Decomposer – recycles materials for use by producers Arrows show the direction of the flow of energy!

Food webs l l 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 l What happens if we remove an organism?

Summary l l l 3 – What are 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 l l 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 l Energy pyramid - a diagram that shows an ecosystem’s loss of energy l What is the purpose? – – To show the amount of energy that moves from one feeding level to another in a food web Facts: l l l 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. 2. Follow my directions to make the pyramid. 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 Pyramid Label each level with the type of organism (producer, 1 st level consumer, etc. ) and amount of energy. 1 kcal 3 Level or 10% Tertiary Consumers rd 10 kcal 10% 1000 kcal 2 nd Level or Secondary Consumers 1 st Level or Primary Consumers Producers

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.