The island has four distinct ecoregions. The Hispaniolan moist forests ecoregion covers approximately 50% of the island, especially the northern and eastern portions, predominantly in the lowlands but extending up to elevation. The Hispaniolan dry forests ecoregion occupies approximately 20% of the island, lying in the rain shadow of the mountains in the southern and western portion of the island and in the Cibao valley in the center-north of the island. The Hispaniolan pine forests occupy the mountainous 15% of the island, above elevation. The flooded grasslands and savannas ecoregion in the south central region of the island surrounds a chain of lakes and lagoons in which the most notable include that of Lake Azuei and Trou Caïman in Haiti and the nearby Lake Enriquillo in the Dominican Republic, which is not only the lowest point of the island, but also the lowest point for an island country.
The island has four distinct ecoregions. The Hispaniolan moist forests ecoregion covers approximately 50% of the island, especially the northern and eastern portions, predominantly in the lowlands but extending up to elevation. The Hispaniolan dry forests ecoregion occupies approximately 20% of the island, lying in the rain shadow of the mountains in the southern and western portion of the island and in the Cibao valley in the center-north of the island. The Hispaniolan pine forests occupy the mountainous 15% of the island, above elevation. The flooded grasslands and savannas ecoregion in the south central region of the island surrounds a chain of lakes and lagoons in which the most notable include that of Lake Azuei and Trou Caïman in Haiti and the nearby Lake Enriquillo in the Dominican Republic, which is not only the lowest point of the island, but also the lowest point for an island country.