Fire is a critical abiotic factor that contributes to plant growth in savanna ecosystems.
An abiotic factor is a non-living part of an ecosystem that shapes its environment. In a terrestrial ecosystem, examples might include water, light, fire, radiation, temperature, humidity, atmosphere, acidity, and soil.
A savanna is a mixed woodland-grassland (i.e. grassy woodland) ecosystem characterized by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to support an unbroken herbaceous layer consisting primarily of grasses. The abiotic, or non-living, factors that affect an ecosystem include the local temperature, light intensity, geology and presence of pollutants.
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