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Unit 2Chapter 3Communities & Biomes
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Limiting factors
Any biotic or abiotic factor that restricts the numbers & distribution of organisms
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Succession: changes over time
Primary succession Takes place on land where there
are no living organisms
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Succession: changes over time Secondary succession
The sequence of changes that take place after an existing community is disrupted in some way
Ex: forest fires, volcanoes, hurricanes, etc
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Biomes
Major geographic communities with similar climates and vegetation
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Aquatic biomes
Photic zone = the portion that is shallow enough for light to penetrate
Ex: intertidal zones, estuaries, coral reefs
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Aquatic biomes
Aphotic zones = deeper waters that never receives sunlight
Ex: the abyss
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Terrestrial Biomes
Tundra
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Terrestrial Biomes
Taiga
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Terrestrial Biomes
Desert
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Terrestrial Biomes
Grasslands
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Terrestrial Biomes
Temperate (deciduous) Forest
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Terrestrial Biomes
Tropical Rain Forests