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Ecosystem

Sahara Desert

Desert

The Sahara is the largest hot desert in the world, spanning roughly 9.2 million square kilometers across North Africa from the Atlantic coast to the Red Sea. Its name descends from the Arabic for the greatest desert. Two theories compete for why the region dried out: a weakened African monsoon following Quaternary glaciation, and the earlier drying of the ancient Tethys Sea around seven million years ago. Neither has displaced the other as the accepted explanation.

Facts
Classification
Biogeographic Realm
Palearctic 1
Protected Status
Partially Protected 2
Large-scale biome/ecoregion spanning many jurisdictions: it contains formally protected reserves and parks alongside unprotected land, so no single stronger category applies to the region as a whole.
Area (sq km)
9,200,000 1
Water Type
Terrestrial 1
Sahara Desert
Filter Results1 entry
Connections

Demonstrates

Why this is disputed. The popular image is the Sahara steadily marching south, but satellite data (1981-2005) attributed most of the Sahel's large-scale vegetation swings to rainfall variation rather than permanent degradation; some researchers hold the desert is fluctuating rather than advancing, while others document real, localized desertification requiring field verification case by case.

Source Defining Desertification (NASA Earth Observatory)

Hosts

Addax, Species
Source World Wildlife Fund
Source Wikipedia: African spurred tortoise
Source Deathstalker (Wikipedia)
Desert Locust, Species
Source Desert Locust (Wikipedia)
Source Fat-tailed gerbil (Wikipedia)
Fennec Fox, Species
Source Fennec Fox (Wikipedia)
Leopard, Species
Source Leopard (Wikipedia)
Source Animal Diversity Web: Rhinopoma hardwickii, lesser mouse-tailed bat (Animal Diversity Web)
Olive Baboon, Species
Source Olive Baboon (Wikipedia)
Rhim Gazelle, Species
Source Rhim gazelle (Wikipedia)
Source Animal Diversity Web, University of Michigan Museum of Zoology: Procavia capensis (Animal Diversity Web)
Rock Pigeon, Species
Source Rock Pigeon (Wikipedia)
Source Saharan striped polecat

In Biome

Desert, Biomes
Source Sahara (Wikipedia)
In the Other Atlases

Found In

Also in Geography Atlas: where this subject is found.

Also in Geography Atlas: where this subject is found.

Also in Geography Atlas: where this subject is found.

Also in Geography Atlas: where this subject is found.

Also in Geography Atlas: where this subject is found.

Also in Geography Atlas: where this subject is found.

Also in Geography Atlas: where this subject is found.

Also in Geography Atlas: where this subject is found.

Also in Geography Atlas: where this subject is found.

Also in Geography Atlas: where this subject is found.

Also in Geography Atlas: where this subject is found.

Sources
1. Sahara (Wikipedia)
Wikipedia
  • Introduction
    The Sahara (, ) is a desert spanning North Africa. With an area of 9,200,000 square kilometres (3,600,000 sq mi), it is the largest hot desert in the world and the third-largest desert overall, smaller only than the deserts of Antarctica and the northern Arctic.
  • Biogeographic realm: palearctic (derived from location stated in entity description)
  • Lead paragraph
    is a desert spanning North Africa
  • In Biome: Desert, lead section
View the Source
2. World Wildlife Fund
World Wildlife Fund
  • Protected Status: Partially Protected
View the Source
Fennec Fox (Wikipedia)
Wikimedia FoundationHosts: Fennec Fox, Introduction
Quote, Hosts: Fennec Fox, Introduction
The fennec fox (Vulpes zerda) is a small fox native to the deserts of North Africa, ranging from Western Sahara and Mauritania to the Sinai Peninsula.
View the Source
Defining Desertification (NASA Earth Observatory)
NASA Earth ObservatoryDemonstrates: Desertification, Introduction
Quote, Demonstrates: Desertification, Introduction
"The Sahara is not advancing, but fluctuating like waves on the ocean," says researcher Stefanie Herrmann from the Office of Arid Land Studies at the University of Arizona, Tucson. "There is no extensive desertification," Prince agrees.
View the Source
Wikipedia: African spurred tortoise
Hosts: African Spurred Tortoise, Wikipedia intro: "lled the sulcata tortoise, is an endangered species of tortoise inhabiting the southern edge of the Sahara Desert and the Sahel. It is the largest mainland spec..."View the Source
Saharan striped polecat
Hosts: Saharan striped polecat, Distribution and habitat
Quote, Hosts: Saharan striped polecat, Distribution and habitat
It mainly inhabits dry, steppe-like environments with sparse bush cover along the edges of the Sahara desert and on its mountains, avoiding the most arid regions in its center.
View the Source
Rhim gazelle (Wikipedia)
Hosts: Rhim Gazelle, Distribution and habitat
Quote, Hosts: Rhim Gazelle, Distribution and habitat
The rhim gazelle is found in isolated pockets across the central Sahara Desert.
View the Source
Animal Diversity Web: Rhinopoma hardwickii, lesser mouse-tailed bat (Animal Diversity Web)
Animal Diversity WebHosts: Lesser mouse-tailed bat, Geographic Range
Quote, Hosts: Lesser mouse-tailed bat, Geographic Range
They can also be found in the African Sahara mostly north of 15°N
View the Source
Leopard (Wikipedia)
Wikimedia FoundationHosts: Leopard, Distribution and habitat
Quote, Hosts: Leopard, Distribution and habitat
The leopard's range in West Africa is estimated to have declined by 95%, and in the Sahara desert by 97%.
View the Source
Desert Locust (Wikipedia)
Wikimedia FoundationHosts: Desert Locust, Ecology and swarming
Quote, Hosts: Desert Locust, Ecology and swarming
During quiet periods, called recessions, desert locusts are confined to a 16-million-square-kilometre (6.2-million-square-mile) belt that extends from Mauritania through the Sahara Desert in northern Africa, across the Arabian Peninsula, and into northwest India.
View the Source
Deathstalker (Wikipedia)
Hosts: Deathstalker Scorpion, Article text
Quote, Hosts: Deathstalker Scorpion, Article text
Its range covers a wide sweep of territory in the Sahara, Arabian Desert, Thar Desert, and Central Asia, from Algeria and Mali in the west through to Egypt, Ethiopia, Asia Minor and the Arabian Peninsula, eastwards to Kazakhstan and western India in the northeast and southeast.
View the Source
Fat-tailed gerbil (Wikipedia)
Hosts: Fat-tailed gerbil, Distribution and habitat
Quote, Hosts: Fat-tailed gerbil, Distribution and habitat
Fat-tailed gerbils are native to the Northern Sahara (northwestern Egypt, Libya, Tunisia, and Algeria).
View the Source
Olive Baboon (Wikipedia)
Wikimedia FoundationHosts: Olive Baboon, Distribution and habitat
Quote, Hosts: Olive Baboon, Distribution and habitat
Isolated populations are also present in some mountainous regions of the Sahara.
View the Source
Rock Pigeon (Wikipedia)
Wikimedia FoundationHosts: Rock Pigeon, Distribution and habitat
Quote, Hosts: Rock Pigeon, Distribution and habitat
They will even live in the Sahara so long as an area has rocks, water, and some plant matter.
View the Source
Animal Diversity Web, University of Michigan Museum of Zoology: Procavia capensis (Animal Diversity Web)
Animal Diversity Web, University of Michigan Museum of ZoologyHosts: Rock Hyrax (Procavia capensis), Geographic Range
Quote, Hosts: Rock Hyrax (Procavia capensis), Geographic Range
It is the most arid-adapted of hyrax species, and its range includes dry mountainous regions in the Namib, Sahara, and Arabian deserts.
View the Source
Dissenting Readings (1 dissenting reading)
Demonstrates: Desertification

Satellite data from 1981 to 2005 attributed most of the Sahel's large-scale vegetation swings to rainfall variability rather than permanent human-caused degradation; the Sahara is fluctuating rather than steadily advancing, though other researchers still document real, localized desertification that needs field verification case by case.

A dissenting reading, from a reviewerDefining Desertification (NASA Earth Observatory), NASA Earth Observatory

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