4.5: Understand How Abiotic and Biotic Factors Affect the Population Size and Distribution of Organisms

ABIOTIC FACTORS: Non-living environmental factors that can affect organism in ecosystem

• Abiotic Factors can affect a range of Species as each organism is adapted to certain environments

EXAMPLES:

EXAMPLES
Light Intensity	Soil pH	Carbon Dioxide Levels
Soil Moisture Level	Availability of Minerals and Nutrients	Availability of Water
Temperature	Oxygen Levels

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BIOTIC FACTORS: Interactions between living organisms

• Biotic Factors will affect all Species as they have the vulnerability of being food to Predators or being a host to diseases that can affect Population of Species

EXAMPLES:

EXAMPLES
Grazing	Competition for Food	Fungi
Diseases	Competition for Shelter
Predation	Bacteria