Deforestation and Recovery of El Yunque and Puerto Rico's Forests

The deforestation of Puerto Rico represents one of the most dramatic environmental transformations in the Caribbean. Before European colonization, the island was almost entirely forested. Over four centuries of colonial agriculture—Spanish sugar and cattle, then American corporate farming—stripped the landscape to approximately 6% forest cover by the 1940s. More than 90% of Puerto Rico's territory was in some form of agriculture at the peak of deforestation.

The destruction was driven by coffee plantations (shade-grown in the highlands), sugar cane (lowlands and coastal plains), pasture for cattle, and charcoal production. Carboneros—charcoal makers—cleared upland forests for fuel throughout the 19th and early 20th centuries.

Conservation came in two waves. In 1876, King Alfonso XII proclaimed the Luquillo Mountains a forest reserve of 10,000 hectares (24,710 acres)—one of the earliest forest protection acts in the Western Hemisphere. On January 17, 1903, President Theodore Roosevelt designated it the Luquillo Forest Reserve under U.S. federal protection, making it the only tropical rainforest in the U.S. National Forest System.

The Civilian Conservation Corps (CCC) operated in Puerto Rico from 1934-1948, establishing 11 nurseries. The El Verde nursery produced 1 million trees annually. By 1946, over 29 million trees of 53 species had been planted in public forests. CCC workers were recruited from jíbaros—rural peasants who had previously worked in sugar cane fields and charcoal production.

Puerto Rico's second-half-of-20th-century reforestation rate was proportionally higher than anywhere else on Earth. Forest cover reached approximately 32% by 1990 and 52.8% by 2004. The recovery was largely driven by Operation Bootstrap's economic shift from agriculture to industry, which reduced land pressure as rural populations moved to cities.

Hurricanes Irma and María caused massive damage to El Yunque in September 2017, stripping canopy and altering the forest's structure—a reminder that recovery is never complete.