Forests are one of the most important biomes on earth. They provide a wide range of “ecosystem services,” from watershed protection and carbon absorption to renewable energy and timber production.
Important reservoirs of plant and animal biodiversity in locations ranging from China to Latin America and many places in between, forests provide key components of the environmental, social and economic well-being of societies around the world.
Centers for Disease Control and Prevention
Yellow fever is a viral disease that is transmitted to humans...
Arizona Mountains forestsLast Updated on 2013-12-08 12:17:32
The Arizona Mountain Forests extend from the Kaibab Plateau in northern Arizona to south of the Mogollon Plateau into portions of southwestern Mexico and eastern Arizona. This ecoregion is an element of the Temperate Coniferous Forests biome. The species richness in this ecoregion is moderate, with vertebrate taxa numbering 375 species. The topography consists chiefly of steep foothills and mountains, but includes some deeply dissected high plateaus. Elevations range from 1370 to 3000 meters (m) with some peaks as high as 3840 m. Soil types have not been well defined; however, most soils are entisols, with alfisols and inceptisols in upland areas. Stony terrain and rock outcrops occupy large areas on the mountains and foothills.
Vegetation zones in this ecoregion resemble the Rocky Mountain Life Zones but at higher elevations. Although forests in this ecoregion are too far south to... More »
Gulf of California xeric scrubLast Updated on 2013-12-04 16:26:07
The Gulf of California xeric scrub ecoregion is situated along the eastern coastal zone and Gulf of California versanta region of land sloping in one general direction of the Baja Peninsula in Mexico, and is delineated by the spine of the La Giganta Sierra Mountains. This ecoregion, located entirely within the nation of Mexico, is classified within the Deserts and Xeric Scrublands biome. Species richness of plants is high in the ecoregion, but modest for fauna; however, endemism is high in this arid habitat, which receives some of the lowest precipitation in all of Mexico.
There are a total of 341 vertebrate species present in the ecoregion. Twenty genera of plants, nine species of the herpetofauna, twelve species of mammal, and two species of avifauna are endemic to this region. Reptilian endemism is particularly notable, with some lizard taxa of highly restricted occurrence... More »
Sierra de la Laguna pine-oak forestsLast Updated on 2013-12-02 23:02:43
The Sierra de la Laguna pine-oak forest is a mountainous ecoregion which rises from the arid Baja California Sur, creating islands of unique vegetative communities. There are approximately 694 plant species, approximately 85 of which are endemic to this ecoregion. Overall species richness is low to moderate, with a total of only 231 vertebrate taxa, for example. The ecoregion is classified to be in the Tropical and Subtropical Coniferous Forests biome. Much of the pine-oak association remains intactThe condition of an ecological habitat being an undisturbed or natural environment due to the inaccessibility of the rugged and inaccessible terrain; however, overgrazing occurs in some parts of the ecoregion, and faunal predators are often killed by local ranchers to protect livestock.
This ecoregion is contained in a larger area known as the Cape Region, and constitutes the... More »
Panamanian dry forestsLast Updated on 2013-11-04 17:59:07The Panamanian dry forests ecoregion occupies approximately 2000 square miles of coastal and near-coastal areas on the Pacific side of Panama, around portions of the Gulf of Panama.
Originally, the Panama dry forests were distributed exclusively in the lower and premontane portions of the Pacific versanta region of land sloping in one general direction (0-800 metres in elevation), around the Gulf of Panama;. This ecoregion has a dry climate and intermediate flora diversity, which is distributed in distinct areas, such as small residual deciduous and semi-deciduous forests and gallery forests along the rivers.
Habitat destruction of this ecoregion has been extensive, with overgrazing, agricultural conversion and urbanization and resultant fragmentation, strong pressure for cattle ranching, burning, and hunting.This process of habitat destruction began in earnest with the Spanish... More »
Valdivian temperate forestsLast Updated on 2013-10-31 23:35:06The Valdivian temperate forests and the more hygrophilous vegetation of the mediterranean climate zone of central Chile, represent a veritable biogeographic island, separated from climatically similar areas by the extensive Pacific Ocean barriers and flanking deserts. Rainfall varies so dramatically within the ecoregion, that some of the sub-units can be considered dry forests, with others classified as rainforest.
The Valdivian temperate forest is characterised by its extraordinary endemism (e.g., 90 percent at the species level and 34 percent at the genus level for woody species) and the great antiquity of its biogeographic relationships. However, faunal species richness is only modest, with only 290 vertebrate taxa having been recorded, in spite of the broad latitude niche available.
Its taxons show close philogenetic relationships dating to the early Tertiary, with Gondwanic... More »
Drag and drop the content to change the order of featured content. The top nine will be displayed.