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Ecology
Energy Flow
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*Food Chain
A visual representation of various organisms in an ecosystem with arrows to show how energy is transferred (usually) by consuming another.
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Food Web
A visual representation of various energy systems in an
ecosystem.
http://videos.howstuffworks.com/discovery/27997-assignment-discovery-the-food-web-video.htm
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Energy Pyramid
A visual representation of various energy systems in an ecosystem
showing how energy is transferred at each level.
Energy is lost as you move up the pyramid.
http://videos.howstuffworks.com/discovery/27995-assignment-discovery-energy-flow-video.htm
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Producers/Autotrophs
Organisms that use the sunlight to create (produce) it’s own energy.Also called an autotroph.
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Consumers/Heterotrophs
Organisms that have to consume (eat) other organisms to obtain energy.Also called a heterotroph.
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Let’s Review
http://videos.howstuffworks.com/discovery/29542-assignment-discovery-autotrophs-and-heterotrophs-video.htm
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Herbivores
Organisms that have to primarily eat grasses/plant material.
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Carnivores
Organisms that have to primarily eat meat/protein material.
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Omnivore
Organisms that eat both meat/protein and plant material.
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Decomposers
Organisms that break down wastes such as dead materials and recycle them in an environment.
http://vimeo.com/13258487
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Scavengers
Organisms that tend to eat dead/decaying matter… garbagehttp://vimeo.com/37761995
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Relationships between species
I. Competition
II. PredationIII. Symbiosis
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Limiting Factors
Factors in the environment that can “limit” a population’s growth. Ex: weather, predation, lack of resources (water, food), habitat destruction, pollution…
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I. Competition
The struggle for organisms to survive as they compete for natural resources including habitat.
http://www.arkive.org/turkey-vulture/cathartes-aura/video-08.html
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II. *Predation
One organism killing another for food.
*Great example of perseverance, species relationships…and Mother’s Day all in one.
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III. Symbiosis
*Mutualism- both species benefit (win/win) (+/+)
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III. Symbiosis
Commensalism- a relationship in which 1 species benefits and the other species is neither helped nor harmed. (+/0)http://vimeo.com/25512434
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III. Symbiosis
*Parasitism- a relationship in which 1 organism lives on or inside another harming it. (+/-)