Coorong and Lakes Alexandrina and Albert Wetland

Coorong and Lakes Alexandrina and Albert Wetland
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Name	Coorong and Lakes Alexandrina and Albert Wetland
Location	Fleurieu Peninsula, South Australia
Area	2000+ km2 (approx.)
Coordinates	35°40′S 139°30′E
Designation	Ramsar Site

Coorong and Lakes Alexandrina and Albert Wetland

The Coorong and Lakes Alexandrina and Albert Wetland is a complex of coastal lagoon, estuarine, lacustrine and floodplain habitats on the south-eastern coast of Australia. The wetland lies adjacent to the Murray River mouth and the Southern Ocean, forming an ecological nexus influenced by the Murray–Darling basin, Kangaroo Island, and the Limestone Coast. It supports significant populations of waterbirds, fish, and migratory species tied to international agreements.

Geography and boundaries

The wetland occupies a corridor extending from the Murray Mouth near Goolwa and Hindmarsh Island along the narrow coastal barrier known as the Coorong National Park spit to the south-east, encompassing Lake Alexandrina and Lake Albert and the associated marshes, swamps and lagoons. Its seaward margin meets the Great Australian Bight and the Southern Ocean, while inland extents abut the Mallee and Fleurieu Peninsula landscapes and the river systems of the Murray River and Mallee tributaries. Administrative boundaries overlap with Alexandrina Council, Rural City of Murray Bridge, and protected areas including Pelican Point Conservation Park and Mundoo Island Conservation Park. Geomorphology is shaped by Holocene sea-level change, aeolian processes linked to the Nullarbor Plain and sediment inputs from the Murray–Darling basin catchment, while transport links such as the Victor Harbor Railway corridor and the township of Goolwa mark human geography.

Ecology and biodiversity

The wetland supports extensive reedbeds dominated by Phragmites australis and tea-tree swamps associated with faunal assemblages including threatened waterfowl such as the Orange-bellied Parrot (migratory interactions), populations of Australasian Bittern, Royal Spoonbill, and large congregations of waders recognized under the China–Australia Migratory Bird Agreement and the Japan–Australia Migratory Bird Agreement. Fish communities include native species like the Murray cod, Pouched Lamprey, and Yarra Pygmy Perch alongside estuarine species such as the Southern Black Bream and King George Whiting. Aquatic invertebrates and seagrass beds provide food webs that support Australian Pelican colonies and migratory shorebirds such as the Bar-tailed Godwit and Red-necked Stint. The wetland is a stronghold for plants of conservation concern, including remnant communities of Coastal Saltmarsh and dune vegetation adjacent to populations of Southern Brown Bandicoot and Bush Stone-curlew.

Hydrology and environmental management

Hydrology is driven by freshwater flows from the Murray River system, episodic marine inundation through the Murray Mouth, and groundwater interactions with the Mount Lofty Ranges aquifers. Water regulation infrastructure such as the Goolwa Barrages and managed openings at the Murray Mouth influence salinity gradients, sediment transport and fish migration patterns, while river regulation linked to upstream works in the Murray–Darling Basin Authority catchment alters ecological regimes. Environmental management involves agencies and stakeholders including the South Australian Department for Environment and Water, Murraylands and Riverland Landscape Board, Traditional Owners represented by Ngarrindjeri Regional Authority, and research partners at University of Adelaide and Flinders University. Restoration and monitoring programs have employed adaptive management, environmental flows negotiated under the Murray–Darling Basin Plan, and collaborative projects with BirdLife Australia and Australian Government Department of Agriculture, Water and the Environment.

Human history and cultural significance

The wetland lies on the ancestral lands of the Ngarrindjeri people, with living cultural connections to eel and waterbird harvesting, songlines, and sites such as the Ramsar-listed lagoons. European exploration by figures associated with the Baudin expedition to Australia and later settlement by colonists shaped land use changes, including pastoralism, river trade centered on Goolwa and steamship routes to Adelaide, and engineering works like the construction of barrages during the 20th century. Historic events and institutions linked to the region include the development of the River Murray steamboat industry, lists of heritage places managed by State Heritage Register (South Australia), and conservation movements involving organizations such as Australian Conservation Foundation and The Nature Conservancy.

Conservation status and threats

Designated under the Ramsar Convention and protected through state parks, the wetland faces threats from altered flow regimes caused by upstream abstraction in the Murray–Darling basin, salinization, algal blooms linked to nutrient enrichment from agricultural catchments like the Riverland (South Australia), invasive species such as European Carp and Gamba grass, and climate change impacts projected for the Intergovernmental Panel on Climate Change scenarios. Biosecurity concerns intersect with fisheries management overseen by agencies such as Primary Industries and Regions SA and regional planning by Alexandrina Council. Conservation responses include environmental water allocations under the Murray–Darling Basin Plan, invasive species control programs with CSIRO research support, and cultural heritage protection driven by the Ngarrindjeri Regional Authority and heritage listings.

Recreation and tourism

The wetland region attracts ecotourism and recreational activities centered on birdwatching circuits promoted by groups like BirdLife Australia, boating and recreational fishing regulated under Primary Industries and Regions SA Fisheries, cultural tourism led by Ngarrindjeri enterprises, and heritage tourism in towns such as Goolwa and Milang linked to maritime history at the Milang Historical Railway Museum. Visitor infrastructure includes campgrounds managed by National Parks and Wildlife Service (New South Wales)-style agencies at state level equivalents, walking trails and interpretive signage developed with funding from the South Australian Tourism Commission and community groups including the Coorong District Council-area volunteers.

Category:Wetlands of South Australia Category:Ramsar sites in Australia