How are tropical rainforests different from tropical dry forests?

Tropical rainforests and tropical dry forests are distinct biomes primarily differentiated by their rainfall patterns and vegetation responses to seasonal change.

Climatic Differences

• Tropical Rainforests: These occur in equatorial regions where temperatures remain high and annual rainfall is consistently heavy, typically exceeding 1,800 to 2,500 mm (70 to 100 inches), distributed fairly evenly throughout the year.12
• Tropical Dry Forests: Found between 10° and 25° latitude, these forests experience a significantly more seasonal climate. They are characterized by a pronounced dry season lasting six or more months, with annual rainfall generally ranging between 800 and 1,800 mm.31

Vegetation and Structure

• Leaf Retention: Rainforests are dominated by evergreen species that maintain their foliage year-round. In contrast, tropical dry forests are often deciduous; many trees shed their leaves during the dry season to conserve water, coming back into leaf at the start of the rainy season.341
• Canopy Density: Rainforests are structurally dense and complex, often featuring at least three distinct strata. Tropical dry forests tend to have a lower, less dense canopy, with structure and composition varying based on the specific amount of rainfall received.143