BIOSUR FOUNDATION

Natural Wealth

The Osa Peninsula houses nearly 3% of all the Earth’s biodiversity and more than half of the biodiversity of Costa Rica. This region includes the most extensive continuous tropical rainforest of the Pacific coast in Central America, where populations of flora and fauna that today are on their way to extinction. This region presents a variety of topography, plains with wetlands, crowned by a cloud forest at about 745 meters above sea level.

The torrential rainfall and periodic floods (24 inches / year) give rise to an extensive network of rivers and streams. Highly saturated soils are known for their acidity, poor drainage, and low fertility that give way to a highly diverse plant diversity (Roser, Maldonado & Bonilla, 2010).

The species inventory is just a small sample of the complexity of these ecosystems. The Osa Peninsula is estimated to have between 4,000 and 5,000 species of vascular plants (Herrera-MacBryde et al. 1997), one third of the tree species in Costa Rica, which includes half of the threatened tree species in the country, many of them exceeding 46 meters high (Thomson, 1997). The variety of fauna is incredibly rich, registering around 375 species of birds (18 of which are endemic), 126 species of mammals, 2 of which, discovered by our founder, 40 species of freshwater fish and approximately 8,000 species of insects. The Osa Peninsula is known nationally and internationally as a high priority area for the focus conservation since the 1970s (Barquero et al. 2012).

Thanks to several aspects such as the low population density, difficult access via land or air which inevitably leads to little tourist traffic, the Osa Peninsula is one of the most beautiful regions of Costa Rica. It is made up of a strong network of protected wildlife areas such as Corcovado National Park, Piedras Blancas National Park, Isla del Caño Biological Reserve, Golfo Dulce Forest Reserve, Golfito National Wildlife Refuge, Donald P National Wildlife Refuge . Hayes, the Golfito Forest National Wildlife Refuge, among other private organizations.

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