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| Lake Bonney | |
|---|---|
| Name | Lake Bonney |
| Location | Antarctica; South Australia |
| Type | saline lake; frozen lake |
| Coordinates | Antarctica: 78°05′S 163°46′E; South Australia: 37°27′S 140°48′E |
| Basin countries | Antarctica; Australia |
| Area | Antarctica: ~4.5 km²; South Australia: ~9 km² |
| Max-depth | Antarctica: ~40 m; South Australia: ~22 m |
Lake Bonney Lake Bonney is the name of two geographically distinct lakes: one in the McMurdo Dry Valleys of Antarctica and another in the Riverland region of South Australia. Both have been the focus of scientific research, regional settlement, and resource-use debates involving institutions such as the University of Adelaide, Victoria University of Wellington, Scott Polar Research Institute, and the United States Antarctic Program. The Antarctic basin is notable for perennial ice covers studied alongside McMurdo Station programs, whereas the South Australian basin is known for irrigation, viticulture, and interactions with Murray River systems.
The Antarctic basin lies within the Taylor Valley of the McMurdo Dry Valleys, adjacent to the Taylor Glacier and near landmarks such as Blood Falls and Wright Valley. The South Australian basin sits in the Riverland near the town of Barmera and the Riverland Biosphere Reserve, forming part of the Murray–Darling Basin catchment. Topographically, the Antarctic site is flanked by the Asgard Range and features katabatic wind channels similar to those mapped around The Hump and Beacon Valley, while the South Australian site occupies a floodplain terrace influenced by meanders of the Murray River and nearby wetlands like 9 Mile Crossing.
In the Antarctic basin, perennial ice cover and a stratified water column produce strong salinity gradients studied by teams from University of Wisconsin–Madison, British Antarctic Survey, and Scripps Institution of Oceanography. Seasonal meltwater inputs from the Taylor Glacier and ephemeral streams such as those monitored by McMurdo Station hydrologists create chemoclines with oxygen minima comparable to profiles from Lake Vanda and Lake Fryxell. The South Australian basin displays regulated inflows from the Murray River via weirs and channels operated by SA Water and irrigation trusts; water-level management for viticulture and horticulture parallels practices in the Mallee and Riverina regions. Limnological surveys by the CSIRO and Flinders University document conductivity, nutrient loading, and thermal stratification influenced by seasonal climate variability associated with the El Niño–Southern Oscillation.
Antarctic microbial mats, endolithic communities, and psychrophilic bacteria in the Antarctic basin have been characterized by researchers from National Institutes of Health collaborations and teams at the Australian Antarctic Division. Microbial taxa similar to those in Lake Vanda and Lake Hoare persist beneath perennial ice, forming trophic links with viruses studied by virologists at McMaster University and University of California, Santa Cruz. The South Australian basin supports avifauna such as Royal Spoonbill, Australian Shelduck, and migratory Sharp-tailed Sandpiper populations recorded by BirdLife Australia and the Atlas of Living Australia. Aquatic vegetation including Typha domingensis and Phragmites australis provides habitat for fish species monitored by Fisheries South Australia and research groups from Murdoch University and The University of Adelaide.
The Antarctic basin was mapped and named during early 20th-century exploration efforts involving expeditions led by figures associated with the British Antarctic Expedition and logistics from United States Antarctic Program operations. Scientific stations such as McMurdo Station and field parties from Scott Polar Research Institute have used the basin as a natural laboratory. The South Australian basin has longstanding connections to Ngarrindjeri and other Aboriginal groups whose cultural sites lie along the Murray River; colonial settlement, pastoral expansion, and irrigation schemes during the 19th and 20th centuries involved agencies like the South Australian Government and companies such as Murray Irrigation Limited. Towns including Barmera, Berri, and Loxton grew with transport links from the Barmera railway line and river trade tied to PS Pevensey-era paddle steamers.
Economic activities at the South Australian basin include irrigated agriculture, viticulture linked to brands managed by firms like Château Tanunda analogues, and tourism promoted by state bodies such as South Australian Tourism Commission. Recreational uses include boating, recreational fishing regulated by Fisheries South Australia, and birdwatching within reserves recognized by Ramsar Convention-related conservation lists. Antarctic uses are restricted to scientific research managed by international agreements including the Antarctic Treaty System and logistics by National Science Foundation programs; tourism is limited and coordinated through operators licensed under IAATO protocols.
Conservation of the Antarctic basin is guided by Protocol on Environmental Protection to the Antarctic Treaty measures, with research oversight by bodies such as the Committee for Environmental Protection and field implementation by the Australian Antarctic Division and United States Antarctic Program. Management challenges in the South Australian basin involve salinization, eutrophication, and water allocation disputes mediated by the Murray–Darling Basin Authority and state agencies including Department for Environment and Water (South Australia). Restoration initiatives involve partnerships among Landcare Australia, local councils like the Berri Barmera Council, universities including Flinders University, and community groups with funding from the Australian Government to improve riparian vegetation, manage invasive species such as Salvinia molesta, and monitor water quality.
Category:Lakes of Antarctica Category:Lakes of South Australia