|List||National Heritage List|
|Legal Status||Listed place (04/08/2009)|
|Place File No||4/08/222/0015|
|Summary Statement of Significance|
Elizabeth Springs is one of a suite of nationally important artesian springs in the Great Artesian Basin, which is the world’s largest artesian basin. The artesian springs have been the primary natural source of permanent water in most of the Australian arid zone over the last 1.8 Million years (the Pleistocene and Holocene periods). These artesian springs, also known as mound springs, provide vital habitat for more widespread terrestrial vertebrates and invertebrates with aquatic larval young, and are a unique feature of the arid Australian landscape.
As these artesian springs are some distance from each other in the Australian inland, and individually each one covers a relatively tiny area, their isolation has allowed the freshwater animal lineages to evolve into distinct species, which include fish, aquatic invertebrates (crustacean and freshwater snail species) and wetland plants. This results in a high level of endemism, or species that are found nowhere else in the world.
Elizabeth Springs is nationally significant as it holds a suite of species which are genetically and evolutionarily distinct from other Great Artesian Basin springs, including an endemic freshwater snail and an endemic fish species. Elizabeth Springs also holds four of the eleven known Great Artesian Basin spring wetland endemic plants, along with five plant species not recorded within 500 kilometres of the springs, which are indicative of a wetter past.
Elizabeth Springs is the only remaining relatively intact Great Artesian Basin spring with extant biota (fauna and flora) in far western Queensland and is regarded as one of the most important artesian springs because of its isolation, intactness and the extinction of other springs. Over 74% of the artesian springs in Queensland are extinct (no longer flowing) and all the artesian springs in New South Wales are extinct or badly damaged.
The Great Artesian Basin (GAB) is one of the largest artesian systems in the world and occupies about 22% of the Australian continent. Artesian springs lie around the rim of the GAB, occurring in complexes of springs known as a ‘supergroup’, and are the natural outlets of the artesian aquifers from which groundwater of the GAB flows to the surface.
The artesian springs, also known as mound springs, are loosely divided into recharge springs and discharge springs. Recharge springs are primarily found along the GAB’s eastern rim on the Great Dividing Range where the GAB aquifers outcrop in an area of relatively high rainfall allowing recharge. The recharge springs release excess GAB recharge water or, in topographic lows intercept the GAB recharge aquifers. The western margin of the GAB also has an area where the GAB aquifers outcrop but recharge is minimal as rainfall is low and intermittent. Discharge springs are those that release groundwater that has entered the GAB from the recharge zones, which flows towards the GAB’s southern, southwestern, western and northern margins. Groundwater dating research has found that water in furthest areas from the recharge areas has been moving through the GAB’s porous rock strata (aquifers) for up to a million years. Elizabeth Springs are regarded as a discharge spring complex and consists of at least five active artesian mound springs together with a few semi-active mounds immediately adjacent.
There are eleven supergroups in the main part of the GAB extending from Bourke in New South Wales and Lake Eyre in South Australia, and two outlier spring supergroups on Cape York Peninsula, including one on the Peninsula’s northern tip. The GAB springs and spring complexes number around six hundred, but one ‘spring’ may represent between two and four hundred spring outlets and supergroups may be regional clusters of such springs, often covering relatively small areas. GAB springs range in size from small springs only a few metres across such as Bundoona, in southern Queensland, to major complexes of up to sixty springs with quite large pools such as Dalhousie, in northern South Australia. Some GAB artesian springs have associated discharge mounds that consist of mud, but most of the springs deposit calcium carbonate, especially the discharge springs, or other salts from the mineral-rich waters discharging from the springs. These evaporites typically form characteristic salt deposits around the spring outflow that can extend for several hundred metres as a distinctive white tail, sometimes yellow or even black, often with a central carbonate mound grading into sulphate and chloride salts. In many instances, particularly among South Australian GAB springs, these deposits combine with wind-blown sand, mud and accumulated plant debris to form mounds around the spring outflow, with the resulting formation resembling a small volcano, colloquially called a ‘mound spring’. Many of the Queensland GAB springs are “softer” and fail to develop anything more substantial than a mound of a few centimetres to a few metres in height (Fensham et al 2004), hence the use of the more readily interpreted term of ‘artesian spring’ rather than ‘mound spring’.
Mound formation of GAB springs is controlled by a range of factors, including groundwater discharge and evaporation rates, hydrochemistry, influence of organic versus organic carbonate precipitation and local subsidence of the mound. Dating of GAB springs using thermoluminescence, uranium-thorium and carbon-14 dating of quartzose sands and carbonate springs deposits have produced dates of more than 740 000± years. Research (Habermahl 2006) has found large spring complex deposits reflect geological and hydrological changes in eastern and central Australia during the last Quaternary (last 2.6 million years) and provide an understanding of long-term changes prior to human intervention.
Habermahl (2006) also notes that groundwater dating, using carbon-14 and chlorine-36 studies, has found water aged several thousand years near recharge areas and more than a million years near the centre of the GAB. The groundwater moves slowly, at less than one metre per year to approximately five metres per year, generally in a south, southwest, west direction and also northwards in the northern portion of the GAB.
Elizabeth Springs form part of the Springvale River supergroup, one of the two most westerly supergroups in Queensland, and lie approximately 300 kilometres south-southeast of Mount Isa. The Springvale supergroup is a group of springs that, with the exception of Elizabeth Springs, are largely extinct or heavily modified. The main group of springs comprising Elizabeth Springs extends over an area of approximately 400 by 500 metres and consists of a series of low mounds and travertine-encrusted outflows. The mounds and surrounding outflows and seepages are well vegetated with sedges and a range of other species including large areas of the spring endemic Eriocaulon carsonii subsp. carsonii, the salt pipewort, which is a perennial and a nationally EPBC-listed threatened species.
GAB artesian springs are a significant refuge in arid and semi-arid Australia, providing one of the few sources of natural permanent water. Estimates of the age of artesian springs have concluded that individual springs may last for up to a few hundred thousand years, but spring groups collectively may last possibly up to several million years. The presence of such permanent freshwater in inland Australia over the past few million years has provided habitat for a wide array of fish, invertebrates and plants that have been “stranded” in GAB artesian springs as inland Australia has dried out.
Ecologically GAB artesian springs are considered an evolutionary refuge as they allow wetland dependent (specialised habitat) species to persist as their original geographic range becomes uninhabitable due to drying over an extended period of time because of climatic change.
With the contraction of their main range, relictual species are hypothesised to have evolved different characteristics from their original stock, leading to the high levels of endemism (the frequency of species with restricted distributions) in isolated GAB artesian spring groups (Brown and Gibson 1983; Morton et al, 1995, p.11, p.119 & p.134). Hence artesian springs provide the localised habitat requirements for a suite of endemic (restricted to one or more GAB spring) fish and aquatic invertebrate species which include hydrobiid molluscs, isopods, ostracods, amphipods, copepods and flatworms (Morton et al, 1995, p.11, p.119 & p.134).
GAB artesian springs hold plants and animals that have evolved into new species found nowhere else. The presence of endemic species, and large peat mounds, indicates that some GAB springs have been active for a very long time. Hydrobiid snails are the best studied of these endemic groups. Hydrobiid snails are the most diverse of all freshwater gastropods and frequently have small distribution ranges, resulting in high levels of endemism (Perez et al 2005). This makes them excellent candidates for evolutionary studies on endemism and speciation and for use as potential indicators (surrogates) of the importance of environments such as GAB artesian springs for other, less well-studied freshwater taxa (Ponder pers. comm. 2004, Perez et al 2005). Hydrobiid snails are particularly well represented in GAB artesian springs with well over 23 taxa and five genera (Perez et al 2005), although each mound complex or aggregation is separated by hundreds of kilometres. It has been hypothesised that this is a result of ancestral Gondwanan hydrobiids being stranded by the increasing aridity of inland Australia and being isolated in the permanent waters of GAB artesian springs (De Deckker 1986, Ponder 1986, Perez et al 2005). Recent work has demonstrated that the GAB hydrobiid snails have evolved in three separate radiations, one in Queensland and two in South Australia, with the Queensland hydrobiids and those of South Australia being completely unrelated (Perez et al 2005).
The Elizabeth Springs, on its own and collectively with the other significant discharge springs comprising the GAB springs, are notable examples of the endemism exhibited by GAB artesian springs. Elizabeth Springs has one endemic snail and one endemic fish (Ponder 2004; Perez et al 2005). It also has four endemic GAB artesian spring plant species as well as five relict spring plant species, plants that have survived from when inland Australia was wetter (Fensham et al 2004). A number of other possible endemic invertebrates also exist at the springs (Ponder 2004). In addition at least one species of frog, four species of reptile, 50 species of birds, four species of mammals, and 13 species of plants are known from the vicinity of the springs from a species list generated by the Australian Natural Heritage Assessment Tool (ANHAT 2005 & 2008), and as detailed in an Queensland Herbarium report based on comprehensive ground surveys (Fensham et al 2004).
Aborigines have used the artesian springs of the GAB for an extended period of time. Some of these GAB artesian springs feature in Aboriginal myths and hold significant spiritual and cultural values for indigenous communities. Artesian springs were and still are a valuable resource for the support of wildlife, and were a vital source of freshwater in an arid environment.
The need for fresh water was also obvious to the first European settlers who ventured west of the Great Dividing Range. These early settlers, encouraged by good seasons, brought their sheep and cattle out onto the great rolling plains. They soon learned that inland Australia was a harsh environment where droughts were common.
The inland of Australia is traversed by streams but these rarely flow and have few permanent waterholes. Unpredictable rainfall and high evaporation meant that early dams and earth tanks built to service the growing population and pastoral industry were unreliable. Permanent water supplies were needed to allow livestock to survive on the arid plains and to provide supplies for the growing service towns.
Europeans first discovered the artesian groundwater of the GAB in 1878 when a shallow bore sunk near Bourke in New South Wales produced flowing water. Many bores were soon drilled near the margins of the GAB in New South Wales and South Australia. In 1885 the Queensland Government Geologist decided to drill a deep bore at Blackall to try to prove the existence of deep artesian supplies in Queensland and provide reliable water supplies during the drought. However, before the completion of this bore, the first artesian flow in Queensland was obtained near Cunnamulla in 1887.
The number of bores drilled in Queensland increased from 34 to 524 in the ten year period from 1889 to 1899. By 1915 over 1 500 flowing artesian bores had been drilled throughout the Basin. The assurance of a reliable water supply for settlers and their stock meant the development of a valuable sheep and cattle industry. Thousands of kilometres of bore drains were excavated to distribute water around properties, thus allowing sheep and cattle to be raised on the vast Mitchell grass, mulga and spinifex plains. Bore drains are small, open channels that can extend 100 kilometres or more.
The water from the GAB continues to be of vital importance to outback regions of Queensland, New South Wales and South Australia. This water is often the only available supply for towns and properties for their domestic and stockwatering requirements. The GAB also supplies water for minor irrigation works, key mining and extractive industries, the petroleum industry, an emerging tourism industry and limited industrial purposes. Sound management of this important natural resource by the present users will ensure that future generations may also benefit from this reliable water source.
(Information sourced from QDNRW 2007)
|Condition and Integrity|
Surveys over the last twenty years have shown that most of the remaining active GAB artesian springs in Queensland are suffering damage from draw-down or stock. Trampling by stock or modification of the spring to improve access for stock is a serious threat to GAB springs. Trampling (also known as pugging) modifies the physical structure of the microhabitat, which are small scale habitat zones with different environment conditions, and if serious enough, removes the microhabitat entirely. Modification of the spring, normally by digging the spring out to improve the pooling of water, removes the microhabitat altogether.
In 2004 there was evidence of cattle grazing within the Elizabeth Springs reserve, with some trampling of the seepages and outflows surrounding the mounds. However since fencing after 2004 the overall condition of the Elizabeth Springs has vastly improved reducing the previous impacts on the intact relictual biota.
The endemic species associated with GAB artesian springs, particularly the vascular plants and invertebrates, appear to be highly sensitive to changes in water flow or conditions at the springs. This is at least in part due to the dependence of many species on microhabitats such as seepages of only a few millimetres depth. A range of human activities that have been occurring over the last 120 years impacts GAB artesian springs. The most serious is groundwater extraction resulting in draw-down of water pressure at the spring, primarily but not exclusively due to numerous uncapped artesian bores and inefficient earth drains, and the loss or modification of microhabitat and ultimately the extinction of the spring. Groundwater extraction has been implicated in the extinction of many springs and has been partly addressed by the extensive GAB bore-capping programme. Extraction for other uses such as mining and town water supply remains a substantial impact. Reductions in flow at Elizabeth Springs have been observed, although in some other springs flow appears to have stabilised. Draw-down remains the most serious threat to GAB artesian springs.
Lastly, the spread of the introduced mosquitofish (Gambusia affinis) is a threat to the freshwater endemics of all the GAB artesian springs. Gambusia has not been reported from Elizabeth Springs.
The GAB Sustainability Initiative (GABSI) is a jointly funded initiative of the Federal and State governments and pastoral bore owners. GABSI aims to preserve the pressure of the Great Artesian Basin, and reduce water waste, through rehabilitating uncontrolled bores and replacing bore drains with polyethylene pipes, tanks and troughs for livestock water. Although a substantial number of bores are now being fully controlled with water distributed by pipelines to tanks and troughs, about 80% of the total outflow from the Basin is still wasted because of inefficient water delivery systems.
Condition report drawn from - Morton et al 1995, p.119; Ponder pers. comm. 1/3/2005; Fairfax and Fensham 2002; Fensham and Fairfax 2003; &, QDNRW 2007.
Springvale Road, 24km south of Warra, comprising Lot
1 on SP120220.|
Australia Nature Conservation Agency (ANCA). (Undated). Elizabeth Mound Springs. Information Leaflet.
ANHAT 2005, Analysis of freshwater snails and freshwater fish - DEH internal report. Australian Natural Heritage Assessment Tool (ANHAT), Department of the Environment and Heritage (DEH), Canberra.
ANHAT 2007, Comparative national analysis of biota richness and endemism rates - DEWHA internal report. Australian Natural Heritage Assessment Tool (ANHAT), Department of the Environment , Water, Heritage and the Arts (DEWHA), Canberra.
Allen, G.R. Midgley, S.H. and Allen, M. 2002, Field guide to the freshwater fishes of Australia. Western Australian Museum. CSIRO Publishing Collingwood, Victoria.
Blake, T. and Cook, M. 2006. Great Artesian Basin historical overview. May 2006 report for Queensland Department of Natural Resources and Mines.
Bowler, J.M. 1982. Aridity in the late Tertiary and Quaternary of Australia. In ‘Evolution of the Flora and Fauna of Arid’. Barker, W.R. and Greenslade, P.J.M. (eds). pp 35-46.
Briggs, J.D. and Leigh, J.H. 1995. Rare or Threatened Australian Plants. Australian Nature Conservation Agency & CSIRO Division of Plant Industry. Collingwood, Vic.
Davies, R.J.-P., Craigie, A.I., Mackay, D.A., Whalen, M.A., Cheong, J. P.E. and Leach, G.J. 2007. Resolution of the taxonomy of Eriocaulon (Eriocaulaceae) taxa endemic to Australian mound springs, using morphometrics and AFLP markers. Australian Systematic Botany, 20, pp.428-447.
De Deckker, Patrick. 2005, Personal Communication. Australian National University. Invertebrate (Crustacean - ostracod) specialist.
DEW 2007a. Department of the Environment and Water Resources - Threatened species and ecological communities (listed under the EPBC Act) website (accessed 14/08/07):
DEW 2007b. Department of the Environment and Water Resources - Rangelands land management (accessed 09/08/07):
DEW 2007c. Department of the Environment and Water Resources - Australian Wetlands Database (accessed 06/09/07):
Fairfax, R.J. and Fensham, R.J. 2002, In the footsteps of J. Alfred Griffiths: a cataclysmic history of Great Artesian Basin springs in Queensland. Australian Geographical Studies 40(2) p 210-230.
Fensham, R.J., Fairfax, R.J. and Sharpe, P.R. 2004. Spring wetlands in semi-arid Queensland: Floristics, environmental relations, classifications and conservation values. Aust. J. Bot. 52 pp.583-595.
Fensham, R.J., Ponder, W.F and Fairfax, R.J. 2007. Draft Recovery plan for the community of native species dependent on natural discharge of groundwater from the Great Artesian Basin 2007–2011. Report to Department of the Environment and Water Resources, Canberra and Queensland Parks and Wildlife Service, Brisbane.
GABCC 1998. Great Artesian Basin Consultative Committee (1998). Great Artesian Basin Resource Study Editors - Cox, R. and Barron, A. . November 1998 report commissioned by the Great Artesian Basin Consultative Committee.
Greenslade, J, Joseph, L. and Reeves, A. (eds) 1985, South Australia’s mound springs. Nature Conservation Society of South Australia.
Greenslade, P. 2002, Register of the National Estate nomination for the Freeling Springs of the Peake Hill Spring Complex (Ponder 1989).
Habermehl, M.A. 1998, Hydrogeology, hydrochemistry, isotype hydrology and age dating of springs and spring deposits in the southwestern (South Australian) part of the Great Artesian Basin. p 16-19 in “Mound Spring Researchers Forum and Spring Management Workshop” Niejalke (ed), Unpublished report by the Mound Spring Researchers Group, Adelaide, 1998
Habermahl, M.A. 2006. Artesian Springs of the Great Artesian Basin. 6th GAB Springs Researcher Forum, Adelaide, 23-24 February 1998.
Harris, C.R. 1992, Mound springs: South Australia’s conservation initiatives. Rangeland Journal 14(2) p157-173.
Hirst, D. 2004, Personal Communication. South Australian Museum. Sparassidae specialist.
IUCN 2007. International Union for conservation of Nature and Natural Resources (IUCN) Red List of Threatened Species, website last updated (accessed 09/08/07):
Ivana Karanovic 2005. Personal Communication, West Australian Museum. Invertebrate (Crustacean - ostracod) specialist.
Dr Remko Leijs. 2005. Personal Communication, South Australian Museum. Invertebrate (Crustacean) specialist.
McLaren, N., Wiltshire, D., and Lesslie, R. 1985, Biological assessment of South Australian mound springs. Report to the South Australian Department of Environment and Planning.
Morton, S.R., Short, J, and Barker, R.D. 1995, Refugia for biological diversity in arid and semi-arid Australia. Biodiversity Series Paper No 4. Biodiversity Unit. Department of Environment, Sports and Territories.
Mudd G.M, 2000, pp. 463-476 Mound springs of the Great Artesian Basin in South Australia: a case study from Olympic Dam. Journal of Environmental Geology Volume 39, Number 5 / March, 2000 pp. 463-476. Website (accessed 10/08/2007): http://www.springerlink.com/content/2nf4ncwxrgeyvcep
Perez, K.E., Ponder, W.F., Colgan, D.J., Clark, S.A. and Lydeard, C. 2005, Molecular phylogeny and biogeography of spring-associated hydrobiid snails of the Great Artesian Basin, Australia. Molecular Phylogenetics and Evolution 34 p 545-556.
Ponder, W.F. 1986, Mound springs of the Great Artesian Basin. p 403-420 in “Limnology in Australia” De Decker, P. and Williams, W.D. (eds), CSIRO Australia, 1989.
Ponder, W.F. and Clark, G.A. 1990, A radiation of Hydrobiid snails in threatened artesian springs in Western Queensland. Records of the Australian Museum 42 p 301-363
Ponder, W.F., Eggler, P. and Colgan, D.J. 1995, Genetic differentiation of aquatic snails (Gastropoda:Hydrobiidae) from artesian springs in arid Australia. Biological Journal of the Linnean Society 56 p 553-596
Ponder, W.F. 2003, Queensland mound spring aquatic invertebrates. Report to the Australian Heritage Commission. Australian Museum Trust.
Ponder, W.F. 2004, Queensland mound spring aquatic invertebrates. Report to the Department of Environment and Heritage. Australian Museum Trust.
Ponder, W.F. 2004 & 2005, Personal Communication from 2004 field surveys of mound springs in Queensland. Australian Museum. Mollusc (gastropod) and Great Artesian Basin springs specialist.
Ponder, W.F. 2006, Aquatic animal diversity in Queensland discharge artesian springs. Report to the Department of Environment and Heritage. Australian Museum Trust.
QDNRW 2007. Queensland Department of Natural Resources and Water 2007, Great Artesian Basin website last updated 01 August 2005 (accessed 09/08/07): http://www.nrw.qld.gov.au/water/gab/
QEPA 2007. Queensland Environmental Protection Agency, Great Artesian Basin spring wetlands. Website (accessed 06/09/07):
Unmack, P.J. Australia's desert springs. GAB fishes. Website (accessed 6/9/07):
Usback S. & James R. (eds.) (1993). A Directory of Important Wetlands in Australia. Australian Nature Conservation Agency (ANCA). Canberra.
Wells, A. 2005. Personal Communication. Australian Biological Resources Study (ABRS), Department of the Environment and Heritage. Trichoptera specialist.
Williams, W.D. 1980. Australian Freshwater Life – The Invertebrates of Australian Inland Waters. The Macmillan Company of Australia Pty. Ltd.
Wilson, B.A. 1995, Artesian springs of the Great Artesian Basin in Queensland. Report for the Australian Nature Conservation Agency and Queensland Department of Environment and Heritage
Wilson, G.D.F. 2003, Environmentally significant sites in Australia, based on evidence from the Phreatoicidea (Crustacea, Isopoda). Report for the Australian Heritage Commission.
Wilson, G.D.F. and Keable, S.J. 2004, A new family and genus of Phraetoicidea (Crustacea, Isopoda) from artesian springs in southwestern Queensland, Australia. Memoirs of the Queensland Museum 49 (2), p 741-759
Wilson, George G.D.F. 2005. Personal Communication, Australian Museum. Invertebrate (Crustacean - phraetoicidean isopod) specialist.
Yeates, A.N. 2001, An assessment of Australian geological sites of possible national and international significance. Vol 1: rocks and landforms. Report for the Australian Heritage Commission. Unpublished Report.
Zeidler, W. 1989, Crustacea. P 79-87 in “Natural history of Dalhousie springs” Zeidler, W. and Ponder, W.F.(eds), South Australian Museum, Adelaide.
Zeidler, Wolfgang. 2005. Personal Communication, South Australian Museum. Invertebrate and Great Artesian Basin springs specialist.
Report Produced Tue Jul 29 10:38:40 2014