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| South Eastern Highlands (IBRA) | |
|---|---|
| Name | South Eastern Highlands (IBRA) |
| State | New South Wales, Victoria, Australian Capital Territory |
| Area | 64,xxxx km2 |
| Bioregion | South Eastern Highlands |
South Eastern Highlands (IBRA) The South Eastern Highlands bioregion occupies upland and tableland areas of New South Wales, the Australian Capital Territory, and northeastern Victoria, forming a transitional zone between the Great Dividing Range, the Sydney Basin, the Riverina and the South Eastern Queensland margins. The region encompasses plateaus, escarpments and valleys associated with drainage systems such as the Murray River, the Murrumbidgee River, and tributaries linked to Lake Eucumbene, and contains significant conservation reserves including Kosciuszko National Park, Namadgi National Park, and the Wollemi National Park precincts.
The bioregion spans highlands and tablelands delineated by the Great Dividing Range, bounded to the east by the Sydney Basin (IBRA), to the south by the South East Corner (IBRA), and to the west by the Riverina (IBRA), with key localities including Canberra, Goulburn, Albury, Wagga Wagga, Bega and Oberon. Major topographic features include the Brindabella Ranges, the Blue Mountains, the Monaro Tablelands, the Goulburn River catchment, and the Snowy Mountains foothills, producing elevation gradients from lowland river valleys to peaks approaching Mount Kosciuszko. Administrative boundaries intersect with agencies such as the NSW National Parks and Wildlife Service, the ACT Parks and Conservation Service, and the Victorian Department of Environment, Land, Water and Planning.
The geology reflects Paleozoic and Mesozoic stratigraphy dominated by sandstone, shale, granite intrusions, and extensive basaltic flows related to the Hunter-Bowen Orogeny and later volcanism recorded in the New England Orogen, producing soils ranging from shallow sandy loams to fertile red-brown earths and basalt-derived black cracking clays found near Gundagai and the Tabulam basalts. The landscape bears structural features tied to the Great Dividing Range uplift, metamorphic assemblages comparable with exposures in the Lachlan Fold Belt, and economic mineral occurrences historically exploited in places like Bathurst and Young.
The region experiences a temperate to cool temperate climate influenced by elevation, orographic rainfall from westerly and easterly systems, and seasonal variability with snow in areas such as Kosciuszko National Park and the Snowy Mountains, summer rainfall maxima in some plateaux, and winter precipitation driven by frontal systems from the Tasman Sea and the Great Australian Bight. Climatic gradients influence hydrology feeding the Murray–Darling Basin through the Snowy Mountains Scheme catchments and affect fire regimes historically recorded in events such as the Black Saturday bushfires-era studies and other major wildfire episodes impacting Blue Mountains National Park and highland eucalypt forests.
Vegetation mosaics include montane snowgum woodlands, alpine herbfields, wet sclerophyll forests dominated by Eucalyptus regnans-type assemblages, dry sclerophyll eucalypt woodlands, temperate rainforest pockets associated with the Gondwana Rainforests floristic links, and riparian vegetation along the Murrumbidgee River and Shoalhaven River. Key plant communities are comparable to those researched at institutions such as the Australian National University, the CSIRO, and the Royal Botanic Gardens Melbourne, with threatened flora recorded in the EPBC Act lists and regional conservation assessments by the NSW Scientific Committee and the ACT Heritage Council.
Faunal assemblages support iconic species including the koala, the eastern grey kangaroo, the common wombat, and montane specialists such as the plains-wanderer-associated habitats, the corroboree frog in alpine wetlands, and populations of the greater glider and sugar glider in eucalypt forests; avifauna is rich with superb lyrebird occurrences in wet forest gullies, while threatened mammals like the brush-tailed rock-wallaby persist in cliff and escarpment refugia. Faunal research and recovery programs are linked to agencies and organisations such as the Australian Wildlife Conservancy, Greening Australia, and university ecology departments at University of Canberra and University of Sydney.
The highlands are the traditional lands of multiple Aboriginal Nations including the Ngunnawal, Wiradjuri, Ngarigo, Yuin, and Gundungurra peoples, with cultural sites, songlines and archaeological evidence connected to places like the Bungendore region and the Cooma area; colonial contact, exploration by figures linked to the Squatting era, and pastoral expansion around towns such as Yass and Queanbeyan reshaped land tenure. Heritage management involves bodies including the Australian Institute of Aboriginal and Torres Strait Islander Studies, the National Native Title Tribunal, and local Aboriginal Land Councils who engage in joint management of parks such as Namadgi National Park and co-management agreements informed by Native Title determinations and cultural heritage legislation.
Land use comprises conservation reserves, forestry operations historically affiliated with the Forestry Corporation of NSW, grazing lands supporting wool and beef industries around the Monaro and Southern Tablelands, irrigated agriculture in river valleys feeding the Murray–Darling Basin, and renewable energy developments including windfarms assessed by state planning bodies. Conservation management integrates actions under the EPBC Act, regional reserve networks such as the National Reserve System, fire management strategies coordinated with the Rural Fire Service (NSW), invasive species control programs addressing pests like Feral cat and European rabbit, and collaborative landscape restoration involving NGOs including Bush Heritage Australia and government agencies.
Category:IBRA regions of Australia