PowerPoint Presentation

Energy Flow in Ecosystems

Mr. Schumaier

What energy roles do organisms play in an ecosystem?

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Organism's play one of three roles:

ProducerConsumerDecomposer

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What is a PRODUCER?

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2An organism that can make its own food such as grass and trees.

What is a CONSUMER?

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An organism that gets its energy by feeding on other organisms

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Describe HERBIVORES, CARNIVORES, OMNIVORES, & SCAVENGERS.

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Herbivores

Eat only plants such as caterpillars, cattle, and deer.

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CarnivoresEats only animals such as lions, spiders, and snakes.

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Omnivore

Eats both plants and animals such as Crows, goats, and most humans.

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ScavengerA carnivore that eats the bodies of dead organisms such at catfish and vultures.

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What do herbivores and carnivores have in common?

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Herbivores and carnivores are similar in that both are consumers; they cannot make their own food but must obtain food by eating other organisms.

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What are DECOMPOSERS?

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An organism that breaks down wastes and dead organisms and returns raw material to the environment Bacteria, fungi, molds, mushrooms

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What is the FOOD CHAIN?

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A series of events in which one organism eat another and obtains energy.

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What is a FOOD WEB?

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Many overlapping food chains in an ecosystem.

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What can be shown through the use of food chain and food web diagrams?

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Food Chain shows one possible path that energy moves through an ecosystem.

Food web is a more realistic way to show the flow of energy through an ecosystem

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What is an ENERGY PYRAMID?

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A diagram that shows the amount of energy that moves from one feeding level to another in a food web.

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How much energy is available at each level of an energy pyramid?

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Third-level consumers = 1kcal

Second-level consumers = 10 kcal

First-level consumers = 100 kcal

Producers = 1,000 kcal

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The most energy is available at the producer level. At each level in the pyramid, there is less available energy than at the previous level.

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Why are food webs a more realistic way of portraying ecosystems than food chains?

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Most producers and consumers are part of many overlapping food chains.

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http://www.youtube.com/watch?v=sbWyrcY5i3s

The End