Population Growth 4.4

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Phases of a population
Lag, Log/Exponential, Stationary, (bacteria/fungi) Death phase
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Log/Exponential Phase
Numbers double per unit of time - No limiting factors, more orgamisms available for reproduction. Bacteria divide at a constant rate. This can't be mainained indefinately.
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Stationary Phase
Birth/Production rate = death rate - Certain factors limit growth - Carrying capacity reached (The maximum number of an organism an enviroment can sustain for a period of time)
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Death Phase
Death rate > Birth/Production rate - Limiting factor have become lethal
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Possible limiting factors
Biotic - Living Abiotic - non living
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Examples of limiting factors
Weather, Temperature, pH, Light. Predation, Toxic waste build up, Lack of food/nutrients
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Type of curve in an animal species
S-shaped
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Types of factors (4)
Biotic, Abiotic, Density dependent, Density independent
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Density dependent/independent
Dependent - Effect increses as population increases Independent - Effect doesnt change with population density
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What is population oscillation regulated by
Negative feedback
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Other cards in this set

Card 2

Front

Log/Exponential Phase

Back

Numbers double per unit of time - No limiting factors, more orgamisms available for reproduction. Bacteria divide at a constant rate. This can't be mainained indefinately.

Card 3

Front

Stationary Phase

Back

Preview of the front of card 3

Card 4

Front

Death Phase

Back

Preview of the front of card 4

Card 5

Front

Possible limiting factors

Back

Preview of the front of card 5
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