Damon Mcknight
Australia is the driest inhabited continent in the world, with 70% of the mainland receiving less than 500mm of rain annually. The country's interior is largely desert, with Western Australia alone boasting three large deserts: the Gibson Desert, the Great Victoria Desert, and the Great Sandy Desert. The desert regions are sparsely populated, with less than 3% of the population, or about 600,000 people, living in these areas. However, Indigenous Australians have inhabited these lands for tens of thousands of years, and their communities continue to thrive in and around these arid regions. The deserts of Australia showcase a diverse landscape beyond sand dunes, with rugged outback terrains, red sand plains, salt lakes, and unique flora and fauna.
| Characteristics | Values |
|---|---|
| Percentage of Australia that is desert | 18% |
| Definition of a desert | A desolate, uninhabited region that receives less than 250 to 500 mm of precipitation annually |
| Number of deserts in Australia | 10 |
| Examples of deserts in Australia | Great Victoria Desert, Gibson Desert, Great Sandy Desert, Simpson Desert, Sturt Stony Desert, Tirari Desert, Tanami Desert, Pilbara Desert |
| Average annual rainfall in Australian deserts | Below 250 mm |
| Percentage of Australia's population living in desert regions | Less than 3% |
| Indigenous communities inhabiting Australian deserts | The Spinifex People, the Martu people, the community of Yuendumu |
| Aboriginal tribes historically nomadic in desert areas | Arrernte, Luritja, Pitjantjatjara, Dieri |
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What You'll Learn
Aboriginal tribes and clans
Deserts make up approximately 18% of Australia's landmass. The desert areas are home to several Aboriginal tribes and clans, who have been nomadic in these regions for thousands of years. These tribes have strong physical and cultural connections to their traditional country and are legally recognised as the traditional owners of large parts of the Outback.
Aboriginal communities, such as the Spinifex People of the Great Victorian Desert, the Martu people of Australia's Pilbara deserts, and the community of Yuendumu on the edge of the Tanami desert, continue to inhabit or surround these dry plains. The Martu people, for instance, have had their ownership of their ancestral lands recognised in law due to the landmark High Court judgment in 1992, which acknowledged the existence of Aboriginal 'native title' over large parts of rural Australia.
Aboriginal tribes have traditionally been nomadic in the desert areas, subsisting on local flora and fauna, known as 'bush food', and carefully preserving their drinking water sources. They were skilled in hunting and gathering, burning the undergrowth to encourage the growth of plants favoured by the game they hunted. They were also adept at seeking out water, a crucial skill for survival in the desert.
The Aboriginal people of Australia consist of numerous distinct groups, with around 400-500 different language-based communities, each with its own territory. Within each community, there are often several clans, which are smaller groups within the larger tribal nation. These clans are often related and share a common language and geographic area.
The Aboriginal people have a strong connection to their land and nature, with beliefs and practices that vary across regions and communities. They have unique cultural beliefs and practices, such as the concept of 'Dreaming', which refers to an ancient era when the earth was formed and is connected to specific places and tracks. They also have a rich artistic heritage, including rock art and dot painting, which helps preserve their history and stories.
Despite facing racist attitudes, poor living conditions, and historical dispossession of their lands, the Aboriginal people of Australia's deserts continue to maintain their cultural identity and connection to their traditional country.
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Desert climate
Australia is a vast continent with a diverse range of landscapes and climates. Approximately 35% of Australia's land area can be classified as desert, exhibiting characteristics of aridity, sparse vegetation, and unique ecological adaptations. These desert regions are predominantly located in the interior, central, and western parts of the continent, forming a significant portion of the country's geography. The desert climate in Australia is shaped by several key factors and exhibits distinct characteristics that set it apart from other regions.
One of the primary factors influencing Australia's desert climate is its geographical position. The continent sits largely within the subtropical high-pressure belt, which is dominated by stable, descending air masses. This results in generally dry conditions across much of the interior, as moisture-laden air from the surrounding oceans is prevented from entering these regions. The presence of the Great Dividing Range along the eastern coastline further contributes to the desert climate by creating a rain-shadow effect, blocking moisture-carrying winds from reaching the interior.
Solar radiation and temperature patterns also play a crucial role in shaping Australia's desert regions. The continent experiences high levels of solar radiation due to its proximity to the equator and relatively clear skies. This results in strong heating of the land surface, leading to the creation of vast, hot, and arid areas. The desert regions of Australia are characterized by extreme temperatures, with hot days and cool nights being a common feature. Summer temperatures can exceed 40°C (104°F), while winters can bring frost and cold spells.
Desert regions in Australia are defined by low and variable rainfall patterns. The average annual rainfall in these areas typically ranges from 250 mm to 500 mm, with some areas receiving even less. Rainfall is often unpredictable and sporadic, occurring in short, intense bursts associated with sporadic tropical cyclones or summer thunderstorms. The arid conditions are further exacerbated by high evaporation rates due to strong winds and intense sunlight, leading to a significant water deficit in the landscape.
The vegetation of Australia's desert regions has adapted to the arid conditions, with unique and resilient plant communities. Desert vegetation is typically sparse, with widely spaced trees and shrubs adapted to survive with minimal water. Succulents, acacias, and eucalyptus trees are common, along with hardy grasses and shrubs. Many plants have deep root systems that can access groundwater, while some have evolved water-storage mechanisms in their leaves or stems. The iconic mulga tree, a type of acacia, is particularly well adapted to the desert conditions and dominates large areas of the Australian Outback.
Desert ecosystems in Australia support a diverse range of animal species that have evolved unique adaptations to survive the harsh conditions. Many animals are nocturnal, avoiding the extreme heat of the day. Marsupials, such as the red kangaroo and the bilby, are well adapted to the desert environment, with the ability to survive on minimal water and extract moisture from their food. Reptiles, including lizards and snakes, are also common, as they are well suited to the hot, dry conditions. Some birds, such as the emu, have developed strategies to cope with water scarcity, while others migrate to desert regions during wetter periods to take advantage of temporary water sources and abundant food supplies.
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Desert landscapes
Australia is the driest inhabited continent in the world, with 70% of the mainland receiving less than 500mm of rain annually. This classifies most of Australia as arid or semi-arid, and about 18% of the country is officially considered desert. This percentage equates to around 40% of Australia's interior.
The desert regions of Australia are home to a diverse range of landscapes, from undulating red sand plains and dunefields to mountainous regions and salt lakes. The Simpson, Strzelecki, Tirari, Gibson, Great Victoria, Great Sandy, Sturt Stony, and Tanami deserts are some of the notable deserts in Australia.
The desert areas have been inhabited by Indigenous Australians for thousands of years, with tribes such as the Arrernte, Luritja, Pitjantjatjara, and Dieri having strong cultural and physical connections to these regions.
Despite the arid conditions, various plant species thrive in Australia's deserts. For example, spinifex, a short plant that grows in sandy soil, is common, and grasslands support grazing for domesticated livestock and wild camels.
The desert climate is characterised by high temperatures during summer, with days reaching above 35°C and occasionally exceeding 40°C for extended periods. At night, temperatures can remain high, hovering around 30°C. However, there is significant temperature variation between day and night due to low humidity.
The unique weather patterns in Australia's deserts result from prevailing winds coming from the east. As these winds encounter mountains along the eastern coast, they lift, cool, and release moisture as rain. As a result, the air moving west over the rest of the continent is drier, contributing to the arid conditions in the central regions.
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Desert wildlife
Australia's deserts cover about 1,371,000 square kilometres (529,000 square miles), or 18% of the Australian mainland. However, about 35% of the Australian continent receives so little rain that it is practically desert. The desert regions of Australia are home to a diverse range of wildlife, including:
Bilbies
Bilbies are small nocturnal marsupials with soft grey-blue fur, pointed snouts, and perky, highly sensitive ears. They are considered an icon of the sandy outback deserts and have been featured in the stories and songs of Indigenous Australians for thousands of years. Bilbies were once common throughout mainland Australia but are now vulnerable, with fewer than 10,000 remaining in certain dry desert areas in the Northern Territory, Western Australia, and a small corner of southwest Queensland.
Dingoes
Dingoes are opportunistic carnivores that are common in the arid hot deserts of Central Australia. They are often considered wild dogs and territorial pests due to their tendency to hunt domestic animals and attack livestock. Dingoes have reddish or sandy-coloured fur, but they can also be found in black, dark brown, or white. They are typically shy around humans and keep their distance.
Kangaroos and Wallabies
Kangaroos and wallabies are iconic Australian mammals that can be found in the country's desert regions. They are well-adapted to the extreme conditions of the desert, including the searing heat of the day and cold nights.
Bats
Bats are another species that calls the Australian desert home. They join a diverse array of birds and reptiles, as well as some frog species that are found nowhere else on Earth.
Camels
The Australian desert has the largest population of feral camels in the world. Camels were introduced to Australia from the Middle East and the Horn of Africa and have caused significant damage to native habitats and the survival of indigenous species.
It is important to note that the desert regions of Australia are not just barren wastelands. They are full of wildlife that has evolved to survive the extreme conditions, and they are also culturally significant to the many Indigenous Australian communities that have inhabited these lands for tens of thousands of years.
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Desert agriculture
About 35% of Australia's land mass, or 2.7 million square kilometres, is considered desert, according to the Australian Museum. This desert region is characterized by low rainfall, high temperatures, and arid or semi-arid conditions. Despite these challenging environmental factors, it is still possible to engage in desert agriculture, which involves growing crops and raising livestock in these arid regions.
In addition to crop selection, livestock husbandry can also be a part of desert agriculture. Goats and sheep are commonly raised in desert regions as they are adaptable and can survive on sparse vegetation. Camels, known for their ability to withstand harsh desert conditions, are also raised for meat, milk, and as working animals. Managing livestock in desert regions requires careful planning of grazing areas and the provision of supplemental feed during periods of scarce natural vegetation.
Soil management is another important aspect of desert agriculture. Desert soils tend to be sandy and low in organic matter, which can lead to issues with water retention and nutrient deficiency. Farmers may employ techniques such as mulching, compost application, and the use of green manures to improve soil structure and fertility. The addition of organic matter helps to increase the soil's water-holding capacity and provides a slow release of nutrients for growing crops.
Successful desert agriculture also involves implementing strategies to protect crops and livestock from extreme weather conditions. Windbreaks, for example, can be planted to reduce the impact of strong desert winds and sandstorms on crops. Shade structures may also be utilized to provide relief from intense sunlight and heat for both crops and livestock. Additionally, farmers need to be vigilant in monitoring and managing pests and diseases that may be unique to desert environments.
Lastly, desert agriculture often involves a strong focus on sustainability and the efficient use of resources. Techniques such as permaculture, which emphasizes working with nature rather than against it, can be employed. This may include designing agricultural systems that mimic natural desert ecosystems, incorporating water-efficient strategies, and utilizing renewable energy sources. By adopting sustainable practices, desert agriculture can become a resilient and environmentally friendly endeavour.
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Frequently asked questions
Approximately 18% of Australia is desert, though some sources state that the figure is 40% or even "almost a fifth".
Australia has 10 deserts, including the Simpson Desert, the Great Victoria Desert, the Gibson Desert, and the Great Sandy Desert.
The climate varies, but summers can be extremely hot, with average daytime temperatures above 35°C, and nights remaining around 30°C. Winters are cooler, with daytime temperatures falling below 15°C in the south. Australian deserts are arid, receiving less than 250mm of rainfall per year.
Few people live in the Australian desert regions, with less than 3% of the population residing there. However, Indigenous Australians have inhabited these areas for tens of thousands of years, and some communities continue to do so.
The Australian deserts are home to unique wildlife and plant species, as well as significant Indigenous cultural sites, such as rock art and archaeological sites. They also present a challenging environment for exploration and construction projects.
