- S shaped curve
- used to predict population growth rate using density dependent factors
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Predation:
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Predator vs Prey
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K-Selected Species:
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Life Span: Long
Time to reproductive maturity: Long
Number of reproductive events (gives birth): Few
Number of offspring: Few
Size of offspring: Large
Parental care: Present
Population growth rate: Slow
Population regulation: Density dependent
Population dynamics: Stable, near carrying capacity
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R-Selected Species
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Life Span: Short
Time to reproductive maturity: Short
Number of reproductive events (gives birth): Many
Number of offspring: Many
Size of offspring: Small
Parental care: Absent
Population growth rate: Fast
Population regulation: Density independent
Population dynamics: Highly variable
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Type 1: (Whale)
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- k selected species
- high parental care
- high survival rate throughout life
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Type 2: (Squirrel/Coral)
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- in between k and r selected species
- decline in survival rate throughout life
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Type 3: (Flowers)
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- r selected species
- low survival rate throughout life
- no parental care
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Metapopulations:
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a group of spatially distinct populations that are connected by occasional movements of individuals between them.