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| South Eastern Highlands (bioregion) | |
|---|---|
| Name | South Eastern Highlands (bioregion) |
| State | New South Wales; Victoria; Australian Capital Territory |
| Area | 7,xxxxx km2 |
| Biogeographic | Interim Biogeographic Regionalisation for Australia |
South Eastern Highlands (bioregion) The South Eastern Highlands (bioregion) occupies uplands and tablelands across southeastern New South Wales, eastern Victoria and the Australian Capital Territory. The region forms part of the Great Dividing Range corridor and interfaces with the South East Corner (bioregion), NSW North Coast, and the Western Slopes. Major population centres adjacent to or within its margins include Canberra, Wagga Wagga, Albury, Goulburn, and Batlow.
The bioregion stretches from the Monaro plateau and the Snowy Mountains foothills through the Brindabella Range to the tablelands north of Goulburn, adjoining the Riverina and the South Eastern Queensland transition zones. Key rivers draining the area include the Murrumbidgee River, Tumut River, Shoalhaven River, and tributaries of the Murray River such as the Upper Murray. The region encompasses protected areas like Kosciuszko National Park, Wollemi National Park, Namadgi National Park, and Alpine National Park, and is bounded by transport corridors including the Hume Highway and the Monaro Highway.
The Highlands are underlain by Paleozoic sedimentary sequences, granite batholiths, and remnant basalt flows associated with Tertiary volcanism such as the Kosciuszko Volcanics. Geological formations include the Sydney Basin and parts of the Lachlan Fold Belt, producing varied regolith and fertile alluvial deposits along river valleys like the Murrumbidgee River floodplain. Soils range from shallow, skeletal soils on escarpments to deep loams and red-brown earths on basaltic plateaus around Tumbarumba and Yass, and podzols on higher elevation forests near Thredbo and Perisher Valley.
The bioregion exhibits a cool temperate to montane climate influenced by orographic effects of the Great Dividing Range and proximity to the Tasman Sea. Seasonal patterns include winter snowfall in the Snowy Mountains and subalpine zones, warm summers across the Tablelands, and variable rainfall driven by East Coast Lows, southern annular mode, and occasional El Niño–Southern Oscillation phases. Temperature gradients produce distinct elevational zonation from warm, dry valleys around Wagga Wagga to cold, frost-prone summits near Mount Kosciuszko.
Vegetation mosaics include Eucalyptus pauciflora–dominated snow gum woodlands in subalpine zones, Eucalyptus delegatensis wet sclerophyll forests in montane gullies, and mixed box–gum grassy woodlands on lower slopes near Yass and Goulburn. Riparian corridors support stands of Casuarina cunninghamiana and Melaleuca species along the Murrumbidgee River. Montane heath and alpine herbfields occur on exposed plateaus associated with Mount Kosciuszko and Bogong High Plains. Threatened vegetation types such as the White Box-Yellow Box-Blakely's Red Gum Woodland are present in fragmented remnants near Albury and Boorowa.
Faunal assemblages include endemic and range-restricted species such as the Corroboree frog in subalpine bogs, the Southern Brush-tailed Rock-wallaby in rocky escarpments, and populations of the Gang-gang cockatoo in montane forests. Large mammals include Eastern Grey Kangaroo and Common Wombat alongside predators like the Dingo. The bioregion provides habitat for migratory and resident birds including Black Cockatoo species and raptors like the Wedge-tailed Eagle. Freshwater systems support native fish such as the Macquarie Perch and populations of Platypus in upland streams. Biodiversity is influenced by invasive species such as European Rabbit and Red Fox and diseases including chytridiomycosis affecting amphibians like the Southern Corroboree Frog.
Land use comprises agriculture sectors such as grazing, fine wool production around Boorowa and Burrinjuck, and irrigated cropping in valley floors adjacent to Albury-Wodonga. Forestry operations historically exploited alpine ash and mountain ash stands managed under frameworks involving State Forests of New South Wales and VicForests. Hydrological infrastructure includes dams like Burrinjuck Dam and Blowering Reservoir supporting water supply and hydroelectric facilities linked to the Snowy Mountains Scheme. Urban expansion around Canberra and regional centres, along with mining activities near historic sites like Tumut and Adelong, have altered native habitats.
Conservation efforts are coordinated across jurisdictions with input from agencies including the New South Wales National Parks and Wildlife Service, Parks Victoria, and the ACT Government acting within arrangements influenced by national instruments such as the Environment Protection and Biodiversity Conservation Act 1999. Key management focuses include connectivity between reserves, fire regime planning informed by research from institutions like the CSIRO and Australian National University, threatened species recovery for taxa like the Corroboree Frog, and catchment-scale water quality work with organisations such as the Murrumbidgee Catchment Management Authority and Goulburn Broken Catchment Management Authority.
The Highlands are the traditional lands of multiple Aboriginal groups including the Ngunnawal, Ngarigo, Gundungurra, and Wiradjuri, with cultural sites, songlines and trade routes across the ranges. European exploration and pastoralism involved figures and events associated with the Early British colonisation of Australia, the Gold Rushes at sites such as Bendigo and Echuca influencing regional settlement, and infrastructure projects like the Snowy Mountains Scheme reshaping landscape and demography. The area hosts cultural landscapes recognized by institutions such as the Australian Heritage Council and features in literature and art by creators linked to the Heide Museum of Modern Art and national archives.