Ecosystem Basics

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10 Terms

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Ecosystem
All living things in a specific area and their interactions with their surrounding environment.
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Trophic Levels
Demonstrates interactions in an ecosystem, with producers at the bottom and consumers at higher levels.
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Autotrophs
Organisms that make their own food through photosynthesis, such as producers.
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Heterotrophs
Organisms that cannot make their own food and rely on other organisms for their food, such as consumers.
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Energy Pyramid
Shows the flow of energy from trophic levels in an ecosystem, with 10% of energy transfer between levels.
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Symbiosis
The close relationship between two organisms.
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Mutualism
A symbiotic relationship where both organisms benefit.
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Commensalism
A symbiotic relationship where one organism benefits and the other is unaffected.
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Parasitism
A symbiotic relationship where one organism benefits and the other is harmed.
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Hunting and Gathering
A sustainable technique used by First Nations people, involving seasonal movement and responsible resource use.