Paroo-Darling National Park

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Paroo-Darling National Park
New South Wales
Paroo Darling NP.JPG
Sign at entrance
Australia New South Wales relief location map.png
Red pog.svg
Paroo-Darling National Park
Nearest town or city White Cliffs
Coordinates 31°31′12″S143°54′00″E / 31.52000°S 143.90000°E / -31.52000; 143.90000 Coordinates: 31°31′12″S143°54′00″E / 31.52000°S 143.90000°E / -31.52000; 143.90000
EstablishedMarch 2000 (2000-03) [1]
Area1,780.53 km2 (687.5 sq mi) [1]
Managing authorities NSW National Parks & Wildlife Service
Website Paroo-Darling National Park
Footnotes
Official nameParoo River Wetlands
Designated13 September 2007
Reference no.1716 [2]
See also Protected areas of
New South Wales

The Paroo-Darling National Park is a protected national park that is located in the Far West region of New South Wales, in eastern Australia. The 178,053-hectare (439,980-acre) national park spans two distinct regions in the outback area. This region covers the arid catchments of the Paroo River (Peery and Poloko Lakes) and the Paroo-Darling confluence to the south.

Contents

History

Lake Peery Peerylake.JPG
Lake Peery

Aboriginal heritage has been protected here and evidence of a lifestyle spanning back many thousands of years in the hearth sites, stone tool scatters and scarred trees that had supplied bark. [3] Prior to European settlement the area was home to the Paakantyi people. [4] [5] The first European to explore the region was Charles Sturt and his party in 1844. They were followed soon after by others in search of pastures for sheep and cattle in the 1860s and the area became part of the 8,480 square kilometres (3,274 sq mi) Momba Station. [5] From 1902 Momba was successively subdivided until 1950 when the remainder was divided into ten leases including Peery, Mandalay and Arrowbar. [5]

The Paroo-Darling National Park was formed after the purchase of seven properties between 2000 and 2003 by the Government of New South Wales, with assistance from the National Reserve System Program. The former Peery property was the first to be acquired by NSW National Parks and Wildlife Service and was gazetted as the Peery National Park 31 March 2000. [4] In 2001 the pastoral properties Mandalay and Arrowbar were added and the park was re-gazetted as part of the Paroo-Darling National Park in 2002. [4] These three properties were in what is now the northern section of the park, near White Cliffs.

Paroo Overflow section

The Paroo River Overflow section ( 30°45′50″S143°31′41″E / 30.764°S 143.528°E / -30.764; 143.528 ) of the park is located in the far west of New South Wales, Australia, 30 kilometres east of White Cliffs and 80 kilometres north of Wilcannia. [4] The park comprises the former pastoral properties of Peery, Mandalay and Arrowbar and covers an area of approximately 96000 hectares (237000 acres). [5] The park is located within the Mulga Lands Bioregion and has significant biodiversity and landscape values. [4] [6] The wetlands in the park, together with Nocoleche Nature Reserve, form the Paroo River Wetlands Ramsar site. [7] The park also includes active artesian mound springs which are considered to be the rarest landform in Australia. [4] [8]

Environment

The park is set in a landscape of grey cracking clays and red sand hills along the Darling River floodplains. Peery and Poloko Lakes and their associated wetlands form part of the Paroo overflow which is important for wildlife. Peery Lake covers 5,026 hectares (12,420 acres) when in flood and is the largest of the Paroo Overflow lakes. This lake is a water bird haven and when full it will hold water for several years. When dry, Peery Lake is the only location in New South Wales where the Great Artesian Basin mound springs are visible in a lakebed. [9]

Most of the park lies within the Paroo Floodplain and Currawinya Important Bird Area, identified as such by BirdLife International because of its importance, when conditions are suitable, for large numbers of waterbirds. [10]

Ecology

Mulga (Acacia aneura) Narrow leafed mulga.jpg
Mulga (Acacia aneura)

The park is located in the Mulga Lands Bioregion which extends from north western NSW into south western Queensland, [6] and contains a range of landforms, each of which supports unique vegetation communities and ecosystems. [4] The predominant vegetation type of this bioregion is dominated by mulga (Acacia aneura) and other woody shrub species. [6] The bioregion also includes the floodplains of the Paroo and Warrego Rivers. [6] The climate of the region is described as arid with low average rainfall which is highly variabile leading to extended droughts and occasional flooding rains. [5] [6] [11] The region is also characterised by evaporation rates that are much higher than average annual rainfall leading to low water availability over much of the region. [4] Temperatures are high in summer and mild in winter. The mulga lands bioregion has suffered from the deterioration of diversity, ecological complexity and ecological functioning due to prolonged overgrazing combined with the semi-arid climate. [12]

Topology

The landforms protected in the park include the Peery Hills with rugged gorges and low escarpments, ephemeral lake basins, sand plains and dune fields. [4] [5] The park contains two large ephemeral lakes, Lake Peery and Lake Poloko. These lakes are part of the Paroo Overflow lake system and fill on average once every five years and remain filled from between one and three years. [7] [13] These are freshwater lakes but become brackish as they dry. [4] The wetlands have been identified as an important refugia for biodiversity in the region. [14] These wetlands rely on the highly variable flows of the Paroo River which is the last unregulated river system in the Murray-Darling Basin. [7] The variable flow regime of the Paroo River with flooding and drying events is a key ecological process for the park as it creates high habitat heterogeneity which supports high biodiversity. [15] [16]

Fauna

Red kangaroo (Macropus rufus) Red Kangaroo.jpg
Red kangaroo (Macropus rufus)

The park supports a variety of different fauna typical of the arid zone of Australia. Prominent macropod species found in the park include red kangaroo (Macropus rufus), eastern grey kangaroo (M. gigantius), western grey kangaroo (M. fuliginosus) and euro (M. robustus). [4] There are also a number of vulnerable mammal species listed under the NSW Threatened Species Conservation Act (NSW TSC Act) that have been recorded in the park. They are yellow-bellied sheath-tailed bat (Saccolaimus flaviventris), little pied bat (Chalinilobus picatus), inland forest bat (Vespadelus baverstocki) and stripe-faced dunnart (Sminthopsis crassicaudata). [4] [7]

Shingleback (Tiliqua rugosa) Shingleback-sa.jpg
Shingleback (Tiliqua rugosa)
Freckled duck (Stictonetta naevosa) Freckled-duck-female.jpg
Freckled duck (Stictonetta naevosa)

Surveys conducted by the Australian Museum and Australian Herpetological Society in 2001 and 2002 recorded 44 species of reptiles and 8 species of amphibians. [4] These include the wedgesnout ctenotus ( Ctenotus brooksi) and crowned gecko ( Diplodactylus stenodactylus) which are listed as vulnerable under the NSW TSC Act. [4] Other species recorded included the lace monitor (Varanus varius), shingleback (Tiliqua rugosa), carpet python (Morelia spilota metcalfei) and mulga snake (Pseudechis australis).

The wetlands located in the park are important in the region because they provide a refuge for many species during times of drought. [14] After floods when the lakes are full they are able to support large numbers of aquatic species and waterbirds. Aerial surveys counted 35900 waterbirds comprising 42 species on Peery Lake in 1993 and 28000 waterbirds comprising 35 species on Poloko Lake in 1990. [7] [17] The numbers of waterbirds that the lake supports is highly variable fluctuating in response to water levels. [17] Peery and Poloko Lake also provide important habitat for migratory shorebirds that are covered by international bird agreements JAMBA, CAMBA and ROKAMBA. [7] There have been five waterbird species listed under the NSW TSC Act recorded in the park. They are freckled duck (Stictonetta naevosa), blue-billed duck (Oxyura australis), brolga (Grus rubicunda), painted snipe (Rostratula benghalensis), and black-tailed godwit (Limosa limosa). [18]

Flora

The park supports a wide diversity of vegetation. A total of 424 vascular plant species have been recorded in the park. [5] There are 20 vegetation communities in the park with the most widespread being mulga tall shrubland/tall open shrubland, Eremophila/Dodonaea/Acacia open shrubland and black bluebush (Maireana pyramidata) low open shrubland. [4] [5]

The park supports two threatened ecological communities listed as endangered under the NSW TSC Act. They are artesian mound springs and nelia ( Acacia loderi ) woodland. [4] Artesian mound springs are also listed as threatened under the Commonwealth Environmental Protection and Biodiversity Act (EPBC Act). The park supports one nationally threatened plant species salt pipewort (Eriocaulun carsonii), which is listed as endangered under the EPBC Act, and four plant species (Nitella partita, Dysphania platycarpa, Eriocaulon carsonii, Dentella minutissima) that are listed as endangered under the NSW TSC Act. [7] The salt pipewort is considered to be one of the rarest vascular plant species in NSW with the only population in NSW occurring in the Lake Peery mound springs. [18]

Artesian mound springs

Artesian mound springs form when water from the Great Artesian Basin reaches the surface through cracks in the overlying rock. As this water evaporates it deposits salts and sediments which form the characteristic mounds that the springs are named after. [19] [20] Mound springs provide an important source of permanent water in arid regions. [19] Mound springs are a threatened community because they occupy a specialised habitat being restricted to locations where artesian water comes to the surface. [8] [21] [22] Without this water many of the species living in these communities could not survive in the arid environment. [23] This specialised habitat requirement also means that the species occupying this habitat often have small populations with little connectivity between the populations. [21] [24] Artesian mound springs are considered to be the rarest landform in Australia. [8]

There are several examples of mound springs located on the bed of Lake Peery. [7] These form the largest active mound spring complex in NSW and are the only known springs in NSW that are on a lakebed. [4] [7] These mound springs are also the only examples that are protected within the reserve system of NSW. [4] The mound springs at Lake Peery are culturally significant for local Aboriginal people as they were a secure and permanent source of freshwater and feature in the local dreamtime stories. [4] Salt pipewort is restricted to active artesian mound springs. [19] In NSW salt pipewort has only been recorded in two locations, Lake Peery and Wee Watah Springs. [8] The population at Wee Watah Springs has become extinct due to stock trampling meaning that the remaining populations of salt pipewort in NSW are all located within the park. [8]

One of the main threats to the mound springs comes from the extraction of water from the Great Artesian Basin for pastoral use. [19] [22] [23] This leads to a loss of aquifer pressure causing lower spring flows. [23] [24] [25] [26] Almost all of the mound springs in western New South Wales are now extinct due to loss of aquifer pressure. [24] The other main threat to the mound springs in the park comes from trampling and grazing from feral species such as goats (Capra hircus) and rabbits (Oryctolagus cuniculus) and from rooting by feral pigs (Sus scrofa). [7] [8] [23] Feral pigs can be particularly destructive for mound springs as they dig up the ground searching for roots and tubers. [23]

Environmental threats

Introduced species, both plant and animal, are a threat to the park's biodiversity. [4] A total of 55 introduced plant species have been recorded in the park. [5] The priority weed species for the park are Bathurst burr ( Xanthium spinosum ), Noogoora burr (Xanthium occidentale) and African boxthorn ( Lycium ferocissimum ). [4] These species can affect the survival of native species through competition and changing the composition of plant communities. [7] Introduced foxes ( Vulpes vulpes ) and feral cats ( Felis catus ) are a threat to many small vertebrate species in the park that they prey on. [4] These species contributed to the regional extinction of many vertebrate species and remain a key threatening process for many vertebrates in Australia's arid zone. [27] Over much of the arid zone in Australia grazing by domestic stock and feral species such as rabbits and goats has resulted in modification in the structure and composition of plant communities. [28] The park was previously used for grazing which effected the plant communities through increased erosion and reduced recruitment and establishment of species such as lignum ( Muehlenbeckia florulenta ). [7] Rabbits, feral goats and domestic stock from neighbouring pastoral properties continue to pose a threat to the ecosystems in the park. [4] [7] Introduced fish such as European carp ( Cyprinus carpio ) threaten the aquatic ecosystems in the park as they compete with and prey on native species. [7]

One of the main threats to the integrity of the wetlands in the park comes from possible future regulation of flows of the Paroo River flows. [7] [15] [29] The ecosystems of the wetlands of the Paroo River are adapted to the highly variable flow regime that is characteristic of this river. [15] [16] Changes to this naturally variable flow regime will impact on the ecological characteristics and the extent of these wetland ecosystems. [15] [29] [30] These impacts could include genetic isolation of populations, fragmentation of breeding populations, removal of breeding cues for waterbird and fish species, changed species composition and loss of habitat diversity. [7] [15] [31] The natural flow regime could be affected by water extraction or by the building of levee banks which divert flows. [7]

Climate change poses a threat to ecosystems across Australia. [32] Predictions for changes to the climate in western NSW include higher temperatures, lower average rainfall but an increase in high intensity rainfall events, changes in rainfall patterns, increased lightning frequency and higher evaporation rates. [33] [34] These changes can lead to increases in fire frequency and intensity, increased droughts, reduced river runoff and water availability and increased flood intensity. [34] Climate change poses a threat to the biodiversity of the park by changing population size and distribution and altering the species composition of ecosystems. [4] The effects of climate change can compound other environmental threats in the park such as feral animal pressures. [4] [32] Changes to the flow regime of the Paroo River due to climate change could have negative impacts on the wetlands in the park. [7]

Management

Conservation reserves play an important role in the conservation of biodiversity in arid Australia. [35] This park fills a need for protected areas within the Mulga Lands Bioregion. The park is managed by NSW National Parks and Wildlife Service in co-operation with the Paroo-Darling National Park Elders Council. [4] Management of the park focuses on controlling introduced species and maintaining appropriate fire regimes.

Management of introduced species focuses on species that are declared noxious and species which have a significant environmental effect. [4] Rabbits are controlled by identification and destruction of warrens. Feral goats are mustered by contractors. Feral pigs are controlled by aerial shooting and foxes are controlled by baiting programs. Where possible, feral animal control is conducted in conjunction with adjoining landholders to maximise effectiveness. [4]

Historically fire has played a role in shaping many of the ecosystems in Australia. [36] In arid regions fire plays a role in vegetation structure and species composition. [4] Changed fire regimes such as increases in intensity or frequency of fires can have negative impacts on biodiversity values. Fires are managed within the park to conserve biodiversity as well as to protect property and Aboriginal sites. Prescribed burning is conducted to manage fuel loads and to mimic historic Aboriginal burning patterns. [4]

Access

The national park can be accessed via dry weather roads, from the villages of either White Cliffs, located, some 20 kilometres (12 mi) away, or Wilcannia. The visitor centre at White Cliffs is able to provide further up-to-date information on the Paroo-Darling National Park.

Camping is permitted at the Coach and Horses campground at the old Wilga Station which is approximately 50 kilometres (31 mi) east of Wilcannia.

See also

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References

  1. 1 2 "Paroo-Darling National Park: Park management". Office of Environment & Heritage. Government of New South Wales . Retrieved 12 October 2014.
  2. ↑ "Paroo River Wetlands". Ramsar Sites Information Service. Retrieved 25 April 2018.
  3. ↑ "Paroo-Darling National Park: Culture and history". Office of Environment & Heritage. Government of New South Wales. Archived from the original on 11 August 2008. Retrieved 2 June 2009.
  4. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 NSW National Parks and Wildlife Service. 2012. Paroo Darling National Park and State Conservation Area Plan of Management. NSW National Parks and Wildlife Service, Hurstville, New South Wales.
  5. 1 2 3 4 5 6 7 8 9 Westbrooke, M., J. Leversha, M. Gibson, M. O'Keefe, R. Milne, S. Gowans, C. Harding, and K. Callister. 2003. The vegetation of Peery Lake area, Paroo-Darling National Park, western New South Wales. Cunninghamia 8: 111–128.
  6. 1 2 3 4 5 NSW National Parks and Wildlife Service. 2003. The bio-regions of New South Wales: Their biodiversity, conservation and history. NSW National Parks and Wildlife Service, Hurstville, New South Wales.
  7. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Kingsford, R.T., and E. Lee. 2010. Ecological Character Description of the Paroo River Wetlands Ramsar Site. Department of Environment, Climate Change and Water NSW, Sydney, New South Wales.
  8. 1 2 3 4 5 6 NSW National Parks and Wildlife Service. 2002. Salt Pipewort (Eriocaulon carsonii) Recovery Plan. NSW National Parks and Wildlife Service, Hurstville, New South Wales.
  9. ↑ "Paroo-Darling National Park". Office of Environment & Heritage. Government of New South Wales. Archived from the original on 22 June 2009. Retrieved 2 June 2009.
  10. ↑ "IBA: Paroo Floodplain & Currawinya". Birdata. Birds Australia. Archived from the original on 6 July 2011. Retrieved 13 September 2011.
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  12. ↑ Thackway, R., and K. Olssen. 1999. Public/private partnerships and protected areas: Selected Australian case studies. Landscape and Urban Planning 44: 87–97.
  13. ↑ Timms, B. J. 2001. Large freshwater lakes in arid Australia: A review of their limnology and threats to their future. Lakes and Reservoirs: Research and Management 6: 183–196.
  14. 1 2 Morton, S. R., J. Short, and R. D. Barker. 1995. Refugia for biological diversity in arid and semi-arid Australia. Australian Government Department of the Environment, Sport and Territories, Canberra, Australian Capital Territory.
  15. 1 2 3 4 5 Boulton, A. J., and M. A. Brock 1999. Australian Freshwater Ecology: Processes and Management. Gleneagles Publishing, Glen Osmond, South Australia.
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  17. 1 2 Kingsford, R. T. 1999. Wetlands and waterbirds of the Paroo and Warrego Rivers. Pages 23–50 in R. T. Kingsford, editor. A Free Flowing River: the Ecology of the Paroo River. Hurstville: NSW National Parks and Wildlife Service, Hurstville, New South Wales.
  18. 1 2 Ramsar Information Sheet (2007). Ramsar Information Sheet for the Paroo River Wetlands. Department of Environment and Conservation NSW, Sydney, New South Wales.
  19. 1 2 3 4 Ponder, W. 1986. Mound springs of the Great Artesian Basin. Pages 403–420 in P. De Decker, and W. D. Williams, editors. Limnology in Australia. CSIRO Australia, Melbourne, Victoria.
  20. ↑ Ponder, W. 1999. Box 4.5: Mound Springs. Page 50 in A. J. Boulton, and M. A. Brock, editors. Australian Freshwater Ecology: Processes and Management. Gleneagles Publishing, Glen Osmond, South Australia.
  21. 1 2 Primack, R. B. 2010. Vulnerability to extinction. Pages 155–172 in R. B. Primack, editor. Essentials of Conservation Biology. 5th edition. Sinauer Associates, Sunderland, Massachusetts.
  22. 1 2 Mudd, G. M. 2000. Mound springs of the Great Artesian Basin in South Australia: a case study from Olympic Dam. Environmental Geology 39: 463–476.
  23. 1 2 3 4 5 Fensham, R. J., W. F. Ponder, and R. J. Fairfax. 2010. Recovery plan for the community of native species dependant on natural discharge of groundwater from the Great Artesian Basin. Department of the Environment, Water, Heritage and the Arts, Canberra, Australian Capital Territory.
  24. 1 2 3 Harris, C. R. 1992. Mound springs: South Australian conservation initiatives. The Rangeland Journal 14: 157–173.
  25. ↑ Australian Government Department of Environment. 2013. The community of native species dependant on natural discharge of groundwater from the Great Artesian Basin. Available from http://www.environment.gov.au/node/14508
  26. ↑ Noble, J. C., M. A. Habermehl, C. D. James, J. Landsberg, A. C. Langston, and S. R. Morton, S. R. 1998. Biodiversity implications of water management in the Great Artesian Basin. The Rangelands Journal 20: 275–300.
  27. ↑ Read, J. L., and R. Cunningham. 2010. Relative impacts of cattle grazing and feral animals on an Australian arid zone reptile and small mammal assemblage. Austral Ecology 35: 314–324.
  28. ↑ James, C. D., J. Landsberg, and S. R. Morton. 1995. Ecological functioning in arid Australia and research to assist conservation of biodiversity. Pacific Conservation Biology 2: 126–142.
  29. 1 2 Kingsford, R. T., R. F. Thomas, and A. L. Curtin. 2001. Conservation of Wetlands in the Paroo and Warrego River catchments in arid Australia. Pacific Conservation Biology 7: 21–33.
  30. ↑ Puckridge, J. T., J. F. Costelloe, and J. R. W. Reid. 2009. Ecological responses to variable water regimes in arid-zone wetlands: Coongie Lakes, Australia. Marine and Freshwater Research 61: 832–841.
  31. ↑ Sheldon, F., A. J. Boulton, and J. T. Puckridge, J. T. 2002. Conservation value of variable connectivity: Aquatic invertebrate assemblages of channel and floodplain habitats of a central Australian arid-zone river, Cooper Creek. Biological Conservation 103: 13–31.
  32. 1 2 Pittock, B. 2003. Climate Change: An Australian Guide to the Science and Potential Impacts. Australian Greenhouse Office, Canberra, Australian Capital Territory.
  33. ↑ CSIRO & Bureau of Meteorology. 2007. Climate change in Australia: Technical report 2007. Available from "Climate Change in Australia - Temperature, Rainfall, Humidity, Sea surface Temperature, Wind speed, Potential evapotranspiration, Downward solar radiation". Archived from the original on 28 May 2014. Retrieved 30 April 2014.
  34. 1 2 Department of Environment, Climate Change and Water. 2010. NSW Climate Impact Profile: the impacts of climate change on the biophysical environment of NSW. Department of Environment, Climate Change and Water, South Sydney, New South Wales.
  35. ↑ Morton, S. R., D. M. Stafford-Smith, M. H. Friedel, G. F. Griffin and G. Pickup. 1995. The stewardship of arid Australia: Ecology and landscape management. Journal of Environmental Management 43: 195–217.
  36. ↑ Bradstock, R. A., A. M. Gill, and R. J. Williams. 2012. Flammable Australia: Fire regimes, biodiversity and ecosystems in a changing world. CSIRO Publishing, Canberra, Australian Capital Territory.
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