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Ecosystem Components and Interactions
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Ecosystem Components Biotic factors: Abiotic factors:
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Ecosystem Components Biotic factors: Abiotic factors:
Living components Examples: Plants, animals, fungi, bacteria Abiotic factors: Non-living components Examples: Rocks, water, air temperature, nutrients
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Ecosystem Components Habitat Area where an organism lives
Example: The African Savannah
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Ecosystem Components Niche
ALL of the physical and biological conditions the organism needs The way the organism interacts with and uses its habitat
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Community Interactions
1. Competition: Occurs when organisms attempt to use the same resources in the same place at the same time Only occurs when resources are limited!
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Community Interactions
2. Predation: Occurs when one organism captures and eats another.
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Community Interactions
3. Symbiosis: Relationship in which two species live closely together and directly interact. Four types…Can be good or bad…
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Types of Symbiosis A. Mutualism: Type of symbiosis
Both species benefit Examples: Cleaner fish + sharks Bees and flowers
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Types of Symbiosis B. Commensalism: Type of symbiosis
One species benefits, the other is neither helped nor harmed
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Types of Symbiosis C. Amensalism: Type of symbiosis
One species is harmed, the other is neither helped nor harmed Example: Mold that produces a substance that kills bacteria but does nothing for the mold
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Types of Symbiosis D. Parasitism: Type of symbiosis
One species benefits by living in or on another, and the other species is harmed.
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Because parasites are so interesting!
A human perspective…
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