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Biodiversity

The Caribbean islands have one of the most diverse eco systems in the world. The animals, fungi and plants, and have been classified as one of Conservation International 's biodiversity hotspots because of their exceptionally diverse terrestrial and marine ecosystems, ranging from montane cloud forests, to tropical rainforest, to cactus scrublands. The region also contains about 8% (by surface area) of the world's coral reefs along with extensive seagrass meadows, both of which are frequently found in the shallow marine waters bordering the island and continental coasts of the region.

For the fungi, there is a modern checklist based on nearly 90,000 records derived from specimens in reference collections, published accounts and field observations. That checklist includes more than 11,250 species of fungi recorded from the region. As its authors note, the work is far from exhaustive, and it is likely that the true total number of fungal species already known from the Caribbean is higher. The true total number of fungal species occurring in the Caribbean, including species not yet recorded, is likely far higher given the generally accepted estimate that only about 7% of all fungi worldwide have been discovered. Though the amount of available information is still small, a first effort has been made to estimate the number of fungal species endemic to some Caribbean islands. For Cuba, 2200 species of fungi have been tentatively identified as possible endemics of the island; for Puerto Rico, the number is 789 species; for the Dominican Republic, the number is 699 species; for Trinidad and Tobago, the number is 407 species.

Many of the ecosystems of the Caribbean islands have been devastated by deforestation, pollution, and human encroachment. The arrival of the first humans is correlated with extinction of giant owls and dwarf ground sloths. The hotspot contains dozens of highly threatened animals (ranging from birds, to mammals and reptiles), fungi and plants. Examples of threatened animals include the Puerto Rican amazon, two species of solenodon (giant shrews) in Cuba and the Hispaniola island, and the Cuban crocodile.

The region's coral reefs, which contain about 70 species of hard corals and from 500 to 700 species of reef-associated fishes have undergone rapid decline in ecosystem integrity in recent years, and are considered particularly vulnerable to global warming and ocean acidification. According to a UNEP report, the Caribbean coral reefs might get extinct in next 20 years due to population explosion along the coast lines, overfishing, the pollution of coastal areas and global warming.

Some Caribbean islands have terrain that Europeans found suitable for cultivation for agriculture. Tobacco was an important early crop during the colonial era, but was eventually overtaken by sugarcane production as the region's staple crop. Sugar was produced from sugarcane for export to Europe. Cuba and Barbados were historically the largest producers of sugar. The tropical plantation system thus came to dominate Caribbean settlement. Other islands were found to have terrain unsuited for agriculture, for example Dominica, which remains heavily forested. The islands in the southern Lesser Antilles, Aruba, Bonaire and Curaçao, are extremely arid, making them unsuitable for agriculture. However, they have salt pans that were exploited by the Dutch. Sea water was pumped into shallow ponds, producing coarse salt when the water evaporated.

The natural environmental diversity of the Caribbean islands has led to recent growth in eco-tourism. This type of tourism is growing on islands lacking sandy beaches and dense human populations.