Mallee Woodlands and Shrublands is one of 32 Major Vegetation Groups defined by the Australian Government Department of the Environment and Energy [1] [2] and one of the 189 habitats in the HOTW habitats of the World classification. [3]
Mallee Woodlands and Shrublands is one of 32 Major Vegetation Groups defined by the Australian Government Department of the Environment and Energy [1] [2] and one of the 189 habitats in the HOTW habitats of the World classification. [3]
"Mallee" refers to the growth habit of a group of (mainly) eucalypt species that grow to a height of 2–9 m (6 ft 7 in – 29 ft 6 in), have many stems arising from a lignotuber and have a leafy canopy that shades 30–70% of the ground. The term is also applied to a vegetation association where these mallee eucalypts grow, on land that is generally flat without hills or tall trees and where the climate is semi-arid. [4] [5]
Of the 32 Major Vegetation Groups classified under the National Vegetation Information System, "Mallee Woodlands and Shrublands" (MVG14):
The major vegetation subgroups of MVG14, based mainly on the perennial components of the understorey are:
Mallee woodlands and shrublands occur in 39 IBRA biogeographic regions. [6]
The present extent of this vegetation group is estimated to be about 214,000 km2 (83,000 sq mi) but the estimate prior to 1750 is 318,000 km2 (123,000 sq mi). In 2001, the area covered by this vegetation group is estimated to be 65% of its pre-1750 coverage. [6]
The most extensive area of this vegetation association in Australia today is found in the Great Victoria Desert. Prior to 1750, the largest area is estimated to have occurred in the Murray-Darling basin. [6]
About 33% of the clearing of this vegetation type is estimated to have accounted for 10% of the total area of land clearing in Australia. In South Australia, clearing of the mallee started in the late 19th century, following the introduction of the stump-jump plough in 1876. [6]
Eucalyptus eremophila, commonly known as the sand mallet or tall sand mallee, is a species of mallet that is endemic to semi-arid regions of Western Australia. It has smooth pale brown and greyish bark, narrow lance-shaped to elliptical adult leaves, flower buds arranged in groups of between seven and eleven with an elongated operculum, and cup-shaped to barrel-shaped fruit.
Mallee, also known as Roe Botanical District, is a biogeographic region in southern Western Australia. Located between the Esperance Plains, Avon Wheatbelt and Coolgardie bioregions, it has a low, gently undulating topography, a semi-arid mediterranean climate, and extensive Eucalyptus mallee vegetation. It has an area of 73,975.59 square kilometres (28,562.13 sq mi). About half of the region has been cleared for intensive agriculture. Recognised as a region under the Interim Biogeographic Regionalisation for Australia (IBRA), it was first defined by John Stanley Beard in 1980.
Mallee are trees or shrubs, mainly certain species of eucalypts, which grow with multiple stems springing from an underground lignotuber, usually to a height of no more than 10 m (33 ft). The term is widely used for trees with this growth habit across southern Australia, in the states of Western Australia, South Australia, New South Wales and Victoria, and has given rise to other uses of the term, including the ecosystems where such trees predominate, specific geographic areas within some of the states and as part of various species' names.
Western Australia occupies nearly one third of the Australian continent. Due to the size and the isolation of the state, considerable emphasis has been made of these features; it is the second largest administrative territory in the world, after Yakutia in Russia, despite the fact that Australia is only the sixth largest country in the world by area, and no other regional administrative jurisdiction in the world occupies such a high percentage of a continental land mass. It is also the only first level administrative subdivision to occupy the entire continental coastline in one cardinal direction.
The chestnut quail-thrush is a native Australian bird of the family Cinclosomatidae. These scrub birds are endemic to Australia and found in all states - barring Tasmania. They are relatively uncommon and are isolated to the semi-arid and arid fringes of the Australian interior.
The Gilbert's whistler is a monotypic species of bird endemic to Australia, scattered in semi-arid zones of southern Australia.
The flora of Australia comprises a vast assemblage of plant species estimated to over 21,000 vascular and 14,000 non-vascular plants, 250,000 species of fungi and over 3,000 lichens. The flora has strong affinities with the flora of Gondwana, and below the family level has a highly endemic angiosperm flora whose diversity was shaped by the effects of continental drift and climate change since the Cretaceous. Prominent features of the Australian flora are adaptations to aridity and fire which include scleromorphy and serotiny. These adaptations are common in species from the large and well-known families Proteaceae (Banksia), Myrtaceae, and Fabaceae.
Eucalyptus redunca, commonly known as black marlock, is a species of mallee or a shrub that is endemic to Western Australia. It has smooth bark, lance-shaped adult leaves, flower buds in groups of between nine and fifteen, lemon-coloured flowers and barrel-shaped fruit.
The Yathong Nature Reserve is a protected nature reserve that is also a nationally and internationally recognized biosphere situated in the central-western region of New South Wales, in eastern Australia. The 107,240-hectare (265,000-acre) reserve was listed by UNESCO in 1977 as a Biosphere Reserve under the Man and the Biosphere Programme (MAB). The reserve is significant for its biodiversity in both native plant and animal species. Cultural heritage and historical grazing activities add to the significance of this site as a conservation area.
The Charcoal Tank Nature Reserve is a protected nature reserve in the central western region of New South Wales, Australia. The 86.4-hectare (213-acre) reserve is situated 10 kilometres (6.2 mi) south of West Wyalong and may be accessed via the Newell Highway and The Charcoal Tank Road. The reserve is an important refuge for native flora and fauna in a highly fragmented landscape, one in which the majority of the original vegetation has been removed.
Eucalyptus incrassata, commonly known as the lerp mallee, yellow mallee, ridge fruited mallee or rib fruited mallee, is a species of mallee that is endemic to southern Australia. It has smooth bark, sometimes with rough, ribbony bark near the base, lance-shaped adult leaves, flower buds in groups of seven, creamy white, pale yellow, sometimes pink or red flowers, and cylindrical, barrel-shaped or bell-shaped fruit.
Eucalyptus uncinata, commonly known as the hook-leaved mallee, is a species of mallee that is endemic to the southwest of Western Australia. It has smooth bark, lance-shaped adult leaves, flower buds arranged in groups of nine to thirteen, creamy white flowers and barrel-shaped to oval or cylindrical fruit.
Eucalyptus moderata, also known as redwood mallee, is a species of tree or a mallee that is endemic to the southwest of Western Australia. It has rough, hard, fibrous bark on some or all of the trunk, lance-shaped adult leaves, flower buds usually in groups of seven, pale yellow flowers and pendulous, urn-shaped fruit.
Triodia scariosa, is more commonly known as porcupine grass or spinifex, and belongs to the endemic Australian grass genus Triodia. The species is perennial and evergreen and individuals grow in mounds, called hummocks, that reach up to ~1m in height. The leaves are ~30 cm long, 1mm in diameter, needlepointed and rigid, and its inflorescence is a narrow, loose panicle that forms a flowering stalk up to ~2m in height. The name is derived from Latin; Triodia refers to the three-toothed lobes of the lemma, and scariosa is in reference to the thin, dry glume. The species is common to Mallee (MVG14) and Hummock grassland (MVG20) communities, in arid and semi-arid regions of Australia.
The Delma australis is often known as the southern legless lizard, or the marble-faced delma. This terrestrial lizard falls into the category of slender Pygopodidae, a legless lizard. There are 21 known species in the Pygopdidae family in Australia. Marble-faced delmas are endemic to Australia. Delma australis was first described by Kluge in 1974.
Mulga is a type of habitat composed of woodland or open forest dominated by the mulga tree, Acacia aneura, or similar species of Acacia.
Lake Cronin is an ephemeral freshwater lake in the Shire of Kondinin as part of the Great Western Woodlands in the Wheatbelt region of Western Australia located approximately 86 km (53 mi) east of the town of Hyden and about 370 km (230 mi) east south east of Perth. The lake is situated within the Lake Cronin Nature Reserve.
The Hemiergis millewae, commonly known as the Millewa skink or Triodia earless skink, is a species of hemiergis lizards that is endemic to Australia. It is a specialist species, highly dependent on Spinifex for food and shelter, and has only been observed in semi-arid Mallee woodlands of southern and eastern Australia. It is considered endangered throughout parts of its range.
Ctenophorus spinodomus commonly known as Eastern Mallee Dragon, is a species of agamid lizard endemic to the arid and semi-arid regions of southeastern Australia. Belonging to the genus Ctenophorus, which comprises a diverse group of 35 species this small lizard is characterised by striking colours and unique behaviours. Commonly known as dragon lizards, spinodomus is derived from the Greek words "spinos" (thorn) and "domos" (house), referring to its preference for burrowing habitats among spiny vegetation. They are curious creatures and can be found darting between the safety of Triodia grass clumps or basking on the red sand.