This is a list of ecoregions in El Salvador as defined by the World Wildlife Fund and the Freshwater Ecoregions of the World database.
Central America is a region of the Americas. It is bordered by Mexico to the north, Colombia to the south, the Caribbean Sea to the east, and the Pacific Ocean to the west. Central America consists of seven countries: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, and Panama. Their combined population is estimated at 44.53 million (2016).
The Global 200 is the list of ecoregions identified by WWF, the global conservation organization, as priorities for conservation. According to WWF, an ecoregion is defined as a "relatively large unit of land or water containing a characteristic set of natural communities that share a large majority of their species dynamics, and environmental conditions". So, for example, based on their levels of endemism, Madagascar gets multiple listings, ancient Lake Baikal gets one, and the North American Great Lakes get none.
The ecology of California can be understood by dividing the state into a number of ecoregions, which contain distinct ecological communities of plants and animals in a contiguous region. The ecoregions of California can be grouped into four major groups: desert ecoregions, Mediterranean ecoregions, forested mountains, and coastal forests.
The Petén–Veracruz moist forests is an ecoregion of the tropical and subtropical moist broadleaf forest biome found in Belize, Guatemala, and Mexico.
The Central American pine–oak forests is a tropical and subtropical coniferous forests ecoregion in the mountains of northern Central America and Chiapas state in southern Mexico.
The Central America bioregion is a biogeographic region comprising southern Mexico and Central America.
The Isthmian–Atlantic moist forests (NT0129) are a Central American tropical moist broadleaf forest ecoregion located on the lowland slopes on the caribbean sea side of Nicaragua and Costa Rica and the Gulf and Pacific Ocean sides of Panama. The forest species are a mix of North American and South American, as this region only became a land bridge in the past 3 million years.
The Central American montane forests are an ecoregion of the tropical and subtropical moist broadleaf forests biome, as defined by the World Wildlife Fund, located in mountains of Central America.
The Chimalapas montane forests is a tropical moist broadleaf forest ecoregion in southern Mexico. It includes the montane tropical forests of the Chimalapas region on the boundary of Chiapas and Oaxaca.
The Sierra Madre de Chiapas moist forests is a tropical moist broadleaf forest ecoregion in southern Mexico and southern Guatemala, extending into the northwestern corner of El Salvador.
The Southern Dry Pacific Coast mangroves ecoregion covers a series of mangrove forests along the Pacific Ocean coast of Nicaragua and Costa Rica, from the southern margin of the Gulf of Fonseca to the Gulf of Nicoya near the border with Panama. Because the area is drier than the mangroves further south, evapotranspiration leaves some areas with higher salinity and even salt pans in the internal areas.