Environmental Factors Affecting Living Organisms (Leaving Cert Biology): Revision Notes
📚 Revision Notes
Environmental Factors Affecting Living Organisms
Environmental factors affecting living organisms refer to external conditions that influence the survival, growth, and reproduction of organisms. They can be categorised as:
- Biotic factors (living factors)
- Abiotic factors (non-living factors)
- Edaphic factors (factors relating to soil)
- Aquatic factors (factors relating to water)
- Climatic factors (factors that concern weather over a long period of time)
| Biotic factors (living factors) | Abiotic factors (non-living factors) | Edaphic factors (factors relating to soil) | Aquatic factors (factors relating to water) | Climatic factors (concern weather over a long period of time) |
|---|---|---|---|---|
| Competition | Soil pH | Temperature | Water currents | Soil temperature |
| Predation | Light intensity | Rainfall | Oxygen content | Soil pH |
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You might be asked to identify the equipment used to measure an environmental factor. Here are some examples:
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Temperature
Measured using a thermometer.
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Light intensity
Measured with a light meter (also known as a lux meter).
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Soil pH
Measured using a pH meter of pH test kit.
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Oxygen content
Measured using a dissolved oxygen metre.
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Rainfall
Measured with a rain gauge.
