Murtnaghurt Lagoon

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Murtnaghurt Lagoon
Murtnaghurt Swamp, Lake Murtnaghurt
Murtnaghurt Lagoon.jpg
View from south-east
Australia Victoria relief location map.jpg
Red pog.svg
Murtnaghurt Lagoon
Location in Victoria
Location Bellarine Peninsula, Victoria
Coordinates 38°16′51″S144°28′8″E / 38.28083°S 144.46889°E / -38.28083; 144.46889 [1]
Type Ephemeral saline lagoon
Primary inflows local
Primary outflows none
Basin  countriesAustralia
Max. length2 kilometres (1.2 mi)
Max. width350–600 m (1,150–1,970 ft)
Surface area81 hectares (200 acres)

Murtnaghurt Lagoon, also known as Murtnaghurt Swamp or Lake Murtnaghurt, is a shallow, ephemeral wetland west of the town of Barwon Heads on the southern coast of the Bellarine Peninsula in Victoria, Australia. It comprises two enclosed depressions, elongated west-east and separated by a low ridge. The wetland is about 2 kilometres (1.2 mi) in length, and up to 600 metres (2,000 ft) wide, with 4.5 kilometres (2.8 mi) of shoreline enclosing an area of 81 hectares (200 acres). It is connected by a narrow 2.7 kilometres (1.7 mi) palaeochannel extending from the lagoon northwards to the main tidal channel of the lower Barwon River. [2]

Contents

Birds

The lagoon is part of the Bellarine Wetlands Important Bird Area and is recognised as an important site supporting, at times, various threatened species of birds, including the little tern, fairy tern, orange-bellied parrot, swift parrot and hooded plover, as well as many waders which use the whole complex of wetlands in the region. [3] [4]

Status and conservation

Murtnaghurt Lagoon is listed under the Ramsar Convention as a wetland of international significance, as part of the Port Phillip Bay (Western Shoreline) and Bellarine Peninsula Ramsar Site. It is also part of the Lake Connewarre State Game Reserve. It is public land which is managed by Parks Victoria and is surrounded by farmland, golf courses and residential housing.. Because of its relatively small size and isolation from the rest of the Lake Connewarre wetland complex it is threatened by edge effects, including pollution from stormwater run-off. [5]

A report by Neville Rosengren for the Save Barwon Heads Alliance recommended that the lagoon should be protected by a geoheritage conservation zone of low intensity land use. It stated that:

"The key elements of this site are relatively inconspicuous, low relief landforms that preserve the materials and the geometry of the earlier sea level landscapes. Research into geoscience features is an ongoing activity as new techniques of analysis and particularly for methods of mapping and displaying geomorphology and dating materials and landforming events become available. Intensive land uses involving close residential sub-division, excavation or other substantial reshaping of landscape would substantially degrade the geoscience significance – and make the materials unavailable for scientific access. The opportunity for further research and monitoring of the processes that formed Murtnaghurt Lagoon would be greatly compromised by extending urban or other high intensity built developments enclosing and adjacent to the site. These activities should not be permitted in the areas enclosing the Murtnaghurt Lagoon." [2]

See also

Related Research Articles

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Port Phillip or Port Phillip Bay is a horsehead-shaped enclosed bay on the central coast of southern Victoria, Australia. The bay opens into the Bass Strait via a short, narrow channel known as The Rip, and is completely surrounded by localities of Victoria's two largest cities — metropolitan Greater Melbourne in the bay's main eastern portion north of the Mornington Peninsula, and the city of Greater Geelong in the much smaller western portion north of the Bellarine Peninsula. Geographically, the bay covers 1,930 km2 (750 sq mi) and the shore stretches roughly 264 km (164 mi), with the volume of water around 25 km3 (6.0 cu mi). Most of the bay is navigable, although it is extremely shallow for its size — the deepest portion is only 24 m (79 ft) and half the bay is shallower than 8 m (26 ft). Its waters and coast are home to seals, whales, dolphins, corals and many kinds of seabirds and migratory waders.

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<span class="mw-page-title-main">Barwon River (Victoria)</span> Perennial river in Victoria, Australia

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Barwon Heads is a coastal township on the Bellarine Peninsula, near Geelong, Victoria, Australia. It is situated on the west bank of the mouth of the Barwon River below Lake Connewarre, while it is bounded to the west by farmland, golf courses and the saline ephemeral wetland of Murtnaghurt Lagoon. At the 2016 census, Barwon Heads had a population of 3,875.

<span class="mw-page-title-main">Bellarine Peninsula</span>

The Bellarine Peninsula is a peninsula located south-west of Melbourne in Victoria, Australia, surrounded by Port Phillip, Corio Bay and Bass Strait. The peninsula, together with the Mornington Peninsula, separates Port Phillip Bay from Bass Strait. The peninsula itself was originally occupied by Indigenous Australian clans of the Wadawurrung nation, prior to European settlement in the early 19th century. Early European settlements were initially centred on wheat and grain agriculture, before the area became a popular tourist destination with most visitors arriving by paddle steamer on Port Phillip in the late 19th century.

<span class="mw-page-title-main">Lake Borrie Wetlands</span>

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<span class="mw-page-title-main">Lake Connewarre</span> Estuarine lake in Victoria, Australia

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<span class="mw-page-title-main">Lake Connewarre State Wildlife Reserve</span>

Lake Connewarre State Wildlife Reserve (LCSWR) is a 3411.1 ha Park in Victoria, Australia, that contains a diverse range of unique and significant ecosystems including a river, tidal delta, lakes, swamps, salt marshes and grasslands.

<span class="mw-page-title-main">Reedy Lake</span> Lake or swamp in Victoria, Australia

Reedy Lake, historically also known as Lake Reedy, is a shallow 5.5-square-kilometre (2.1 sq mi) intermittent freshwater lake or swamp on the lower reaches of the Barwon River, on the Bellarine Peninsula southeast of Geelong in the Australian state of Victoria.

The Port Phillip Bay and Bellarine Peninsula Ramsar Site is one of the Australian sites listed under the Ramsar Convention as a wetland of international importance. It was designated on 15 December 1982, and is listed as Ramsar Site No.266. Much of the site is also part of either the Swan Bay and Port Phillip Bay Islands Important Bird Area or the Werribee and Avalon Important Bird Area, identified as such by BirdLife International because of their importance for wetland and waterbirds as well as for orange-bellied parrots. It comprises some six disjunct, largely coastal, areas of land, totalling 229 km2, along the western shore of Port Phillip and on the Bellarine Peninsula, in the state of Victoria. Wetland types protected include shallow marine waters, estuaries, freshwater lakes, seasonal swamps, intertidal mudflats and seagrass beds.

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<span class="mw-page-title-main">Bellarine Wetlands Important Bird Area</span>

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References

  1. "Murtnaghurt Swamp". Vicnames. Government of Victoria. 2 May 1966. Archived from the original on 4 June 2014. Retrieved 4 June 2014.
  2. 1 2 Rosengren, Neville (November 2009). Murtnaghurt Lagoon, Bellarine Peninsula, and Related Landforms: Nature, Origin and Geoscience Significance (PDF). Melbourne: La Trobe University and Environmental GeoSurveys Pty Ltd.
  3. Anderson, Mark; Convenor, Birds Australia – Victoria Conservation Committee (14 October 2007). Submission to Strategic Planning, City of Greater Geelong, regarding a proposed subdivision of land adjacent to Murtnaghurt Lagoon (PDF). Birds Australia.
  4. "IBA: Bellarine Wetlands". Birdata. Birds Australia. Retrieved 11 June 2011.
  5. Ashton-Smith, Elissa; Save Barwon Heads Alliance Inc. (26 October 2007). "Submission to an inquiry by the Legislative Council Select Committee on Public Land Development" (PDF). Parliament of Victoria.