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Great Sandy-Tanami desert (AA1304)

Great Sandy-Tanami desert
Tanami Desert, Northern Territory, Australia
Photograph by www.c2ctours.com


 

Where
Northwestern Australia
Biome
Deserts and Xeric Shrublands

  Size
317,800 square miles (823,000 square kilometers) -- about the size of Texas and Iowa combined
Relatively Stable/Intact
 
 

· Wide Open Spaces
· Special Features
· Did You Know?
· Wild Side
· Cause for Concern
More Photos

Wide Open Spaces

In Western Australia, the Great Sandy Desert is an uninhabited wilderness where high red sand dunes extend in parallel rows for hundreds of miles. To the east, the Tanami Desert is a vast area of red sandplains broken up by hills and ranges. Like all Australian deserts, this ecoregion receives limited, sporadic rainfall and is covered in sparse vegetation. Clumps of tough spinifex grasses and scattered small, hardy saltbush shrubs cover the desert. Above this, sparse, spiny acacias and tall desert oaks can be seen.

Special Features Special Features

This immense region stretches across much of the Western Territory and into the Northern Territory. Its most significant feature is Uluru, a large, red sandstone dome that rises 1,148 feet (350 m) above the surrounding plain of small shrubs and trees. It is actually the summit of a buried sandstone hill, formed by the erosion and sedimentation of ancient mountain ranges. This massive natural wonder measures 5 miles (8 km) around the base and figures significantly in Aborigine mythology. Water runoff from Uluru supports plant communities around its base that would not normally be found in such an arid environment.

Did You Know?
Wild camels roam the arid Australian interior. These pack animals were imported from Afghanistan and widely used by early explorers and pioneers. They were eventually replaced by motor vehicles in the 1920s. Today’s camels are the descendents of those that strayed or were turned loose. These feral grazing animals have become a serious management problem because they degrade the native vegetation.

Wild Side

To live in this hot, arid environment, mammals are often nocturnal, emerging to feed only during cooler night hours. For example, rabbit-like bilbies are delicate, long-eared marsupials that do not venture out from their burrows until well after dark. The tiny mulgara is a mouse-like marsupial that hunts for insects at night. Also living here is the golden, furry marsupial mole that almost never emerges from its burrow. This blind mammal is an adept burrower, coming out only after heavy rains. By day, thorny devils--colorful spiny lizards--search for black ants to eat. Rare Alexandra’s parrots may also be seen flying about in pairs searching for nectar and grass seeds. This elusive bird has a pastel-blue head and a long tail. The brightly colored mulga parrot and scarlet-chested parrot are more easily spotted. The largest remaining population of the endangered rufous hare wallaby lives in the Tanami Desert. This hare-sized marsupial will emerge from its den only at sunset to begin foraging.

Cause for Concern

This area is mostly uninhabited--although some mining, cattle-grazing, and Aboriginal land use does take place. Introduced and feral animals such as cats, foxes, and camels are all serious concerns. Tourist pressures at Uluru and unmanaged fires are also potential threats.

For more information on this ecoregion, go to the World Wildlife Fund Scientific Report.

All text by World Wildlife Fund © 2001