The Baja California Desert ( es, Desierto de Baja California) is a

desert A desert is a barren area of landscape where little precipitation occurs and, consequently, living conditions are hostile for plant and animal life. The lack of vegetation exposes the unprotected surface of the ground to denudation. About on ...

ecoregion An ecoregion (ecological region) or ecozone (ecological zone) is an ecologically and geographically defined area that is smaller than a bioregion, which in turn is smaller than a biogeographic realm. Ecoregions cover relatively large areas of ...

Mexico Mexico (Spanish language, Spanish: México), officially the United Mexican States, is a List of sovereign states, country in the southern portion of North America. It is borders of Mexico, bordered to the north by the United States; to the so ...

's Baja California Peninsula. This ecoregion occupies the western portion of the Baja California peninsula, and occupies most of the Mexican states of

Baja California Sur Baja California Sur (; 'South Lower California'), officially the Free and Sovereign State of Baja California Sur ( es, Estado Libre y Soberano de Baja California Sur), is the least populated state and the 31st admitted state of the 32 federal ent ...

and

Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...

. It covers 77,700 square kilometers (30,000 square miles). The climate is dry, but its proximity of the Pacific Ocean provides humidity and moderates the temperature. The flora mostly consists of

xeric Deserts and xeric shrublands are a biome defined by the World Wide Fund for Nature. Deserts and xeric (ancient Greek xērós, “dry") shrublands form the largest terrestrial biome, covering 19% of Earth's land surface area. Ecoregions in this h ...

shrubs and over 500

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriat ...

of recorded

vascular plant Vascular plants (), also called tracheophytes () or collectively Tracheophyta (), form a large group of land plants ( accepted known species) that have lignified tissues (the xylem) for conducting water and minerals throughout the plant. They ...

Geography

The Baja California Desert ecoregion lies on the western portion of the Baja California Peninsula and occupies most of the Mexican states of

and

. The ecoregion covers 77,700 square kilometers (30,000 square miles) and includes most of the Peninsula's western slope. It is bounded on the west by the

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the conti ...

and on the east by the

Peninsular Ranges The Peninsular Ranges (also called the Lower California province) are a group of mountain ranges that stretch from Southern California to the southern tip of the Baja California peninsula; they are part of the North American Coast Ranges, which ...

, and extends from approximately 31º to 24º north. Elevations vary, and include mountain ranges on the western central part (), plains of middle elevation (), and vast extensions of coastal dunes. North of 30° north latitude on the Pacific slope, the Baja California desert transitions to the

California coastal sage and chaparral The California coastal sage and chaparral ( es, Salvia y chaparral costero de California) is a Mediterranean forests, woodlands, and scrub ecoregion located in southwestern California (United States) and northwestern Baja California (Mexico). It ...

. The

Sierra Juárez and San Pedro Mártir pine-oak forests Sierra (Spanish for "mountain range" and "saw", from Latin '' serra'') may refer to the following: Places Mountains and mountain ranges * Sierra de Juárez, a mountain range in Baja California, Mexico * Sierra de las Nieves, a mountain range i ...

occupy the higher Peninsular Ranges to the north, where a number of tree species are found including the near-threatened

California fan palm ''Washingtonia filifera'', the desert fan palm, California fan palm, or California palm,Flora of North America Association. ''Flora of North America: North of Mexico Volume 22: Magnoliophyta: Alismatidae, Arecidae, Commelinidae (in Part), and Zi ...

.C. Michael Hogan. 2009
''California Fan Palm: Washingtonia filifera'', GlobalTwitcher.com, ed. Nicklas Stromberg
/ref> The

Sonoran Desert The Sonoran Desert ( es, Desierto de Sonora) is a desert in North America and ecoregion that covers the northwestern Mexican states of Sonora, Baja California, and Baja California Sur, as well as part of the southwestern United States (in Ariz ...

lies to the northeast. The Gulf of California xeric scrub lies east of the Peninsular Ranges and to the south.

Climate

The climate is dry and mostly

subtropical The subtropical zones or subtropics are geographical and climate zones to the north and south of the tropics. Geographically part of the temperate zones of both hemispheres, they cover the middle latitudes from to approximately 35° north a ...

with the southernmost parts being

tropical The tropics are the regions of Earth surrounding the Equator. They are defined in latitude by the Tropic of Cancer in the Northern Hemisphere at N and the Tropic of Capricorn in the Southern Hemisphere at S. The tropics are also referred to ...

. Although rainfall is low, the Pacific Ocean provides some humidity and moderates the temperature compared to the

Sonoran desert The Sonoran Desert ( es, Desierto de Sonora) is a desert in North America and ecoregion that covers the northwestern Mexican states of Sonora, Baja California, and Baja California Sur, as well as part of the southwestern United States (in Ariz ...

, which lies on the east slope of the Peninsular Ranges.

Flora

The ecoregion is mostly covered by

shrub A shrub (often also called a bush) is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from tree ...

s, which create varying associations based on elevation and soil conditions. The ecoregion has close to 500

s, of which a number are

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...

, for example the Boojum tree (''Fouquieria columnaris'') or

Creeping Devil ''Stenocereus eruca'', commonly known as the creeping devil, is a member of the family Cactaceae. It is one of the most distinctive cacti, a member of the relatively small genus ''Stenocereus''. It is endemic to the central Pacific coast of Baja ...

(''Stenocereus eruca'').

Fauna

The ecoregion has about 50 species of mammals. Large mammals include

mule deer The mule deer (''Odocoileus hemionus'') is a deer indigenous to western North America; it is named for its ears, which are large like those of the mule. Two subspecies of mule deer are grouped into the black-tailed deer. Unlike the related whi ...

(''Odocoileus hemionus''),

desert bighorn sheep The desert bighorn sheep (''Ovis canadensis nelsoni'') is a subspecies of bighorn sheep (''Ovis canadensis'') that is native to the deserts of the United States' intermountain west and southwestern regions, as well as northwestern Mexico. The ...

(''Ovis canadensis nelsoni''), puma (''Puma concolor''), and the critically endangered Baja California pronghorn (''Antilocapra americana peninsularis''). The San Quintin kangaroo rat (''Dipodomys gravipes'') and Baja California rock squirrel (''Otospermophilus atricapillus'') are endemic to the ecoregion. There are about 200 native bird species, including

golden eagle The golden eagle (''Aquila chrysaetos'') is a bird of prey living in the Northern Hemisphere. It is the most widely distributed species of eagle. Like all eagles, it belongs to the family Accipitridae. They are one of the best-known bird ...

(''Aguila chrysaetos''),

peregrine falcon The peregrine falcon (''Falco peregrinus''), also known as the peregrine, and historically as the duck hawk in North America, is a cosmopolitan bird of prey (raptor) in the family Falconidae. A large, crow-sized falcon, it has a blue-grey bac ...

(''Falco peregrinus''),

crested caracara The crested caracara (''Caracara plancus'') is a bird of prey in the family Falconidae. It is found from the southern United States through Central and South America to Tierra del Fuego. It was formerly placed in the genus ''Polyborus''. Descrip ...

(''Caracara cheriway''),

osprey The osprey (''Pandion haliaetus''), , also called sea hawk, river hawk, and fish hawk, is a diurnal, fish-eating bird of prey with a cosmopolitan range. It is a large raptor reaching more than in length and across the wings. It is brown o ...

(''Pandion haliaeutus''), and burrowing owl (''Athene cunicularia''). Millions of ducks and geese over-winter in the coastal lagoons, including Ojo de Liebre Lagoon,

San Ignacio Lagoon San Ignacio Lagoon (Laguna San Ignacio) is a lagoon located in Mulegé Municipality of the Mexican state of Baja California Sur, 59 kilometers (37 mi) from San Ignacio, Mexico, and Highway 1. It is one of the winter sanctuaries of the eastern ...

, and

Magdalena Bay Magdalena Bay ( es, Bahía Magdalena) is a long bay in Comondú Municipality along the western coast of the Mexican state of Baja California Sur. It is protected from the Pacific Ocean by the unpopulated sandy barrier islands of Isla Magdalen ...

Protected areas

A 2017 assessment found that 45,940 kilometers squared, or 60 percent, of the ecoregion is in protected areas. Protected areas include El Vizcaíno Biosphere Reserve and Valle de los Cirios Flora and Fauna Protection Area; both protected areas extend into the adjacent Gulf of California xeric scrub ecoregion.

External links

References

{{Deserts Deserts and xeric shrublands Deserts of Mexico Ecoregions of Mexico Baja California Peninsula Flora of Baja California Flora of Baja California Sur Flora of the California desert regions Natural history of Baja California Natural history of Baja California Sur North American desert flora Nearctic ecoregions