Savannah ecosystems are characterized by grasslands with scattered trees, where forest development is limited. Fire, both natural and human-induced, plays a crucial role in preventing tree encroachment by killing saplings. Large grazing herbivores consume grass and young trees, thus maintaining the grassland dominance. Seasonal rainfall patterns, with distinct wet and dry periods, also favor grasses over trees, as many trees struggle to survive prolonged dry spells without sufficient water, while grasses can regrow after fires or droughts.