Factors Regulating Forest Growth in Savannah Biomes

Savannah ecosystems are maintained by a delicate balance of climate and disturbance. Fire (2), grazing herbivores (3), and distinct seasonal rainfall (4) prevent woody trees from expanding and displacing native grasses. Burrowing organisms and basic soil chemistry do not act as primary macro-level limiting factors for forest expansion in these biomes. > Frequent seasonal fires, large herbivore herds, and distinct dry periods maintain the open structure of savanna ecosystems. Answer: (c).