Simpson Strzelecki Dunefields - conservation status analysis
This page shows the conservation status of the bioregion, based on protection of landscapes within formal conservation management mechanisms.
Thirty-three landscapes occur in the bioregion, and 2 of these, the Bulloo Sandplains and Tibooburra Salt Lakes and Playas, are endemic to the bioregion (Mitchell in prep).
Most landscapes individually occupy less than 5 per cent of the bioregion. The smallest, the Mootwingee-Wonnaminta Ranges landscape, occupies 5.90 hectares or 0.0003 per cent of the bioregion. However, the largest landscape, the Sturt Linear Dunes, occupies almost half (41.81 per cent and about 883,873 ha) of the bioregion, while Bulloo Linear Dunes (12.21 per cent) and Ursino Linear Dunes (9.65 per cent) are also significant.
Other landscapes that individually occupy more than 2 per cent of the bioregion are: Tibooburra Alluvial Plains (4.69 per cent), Mootwingee-Wonnaminta Alluvial Plains (3.78 per cent), Bulloo Salt Lakes and Playas (3.01 per cent), Ursino Alluvial Plains (2.89 per cent), Barrier Sandplains (2.56 per cent), Barrier Alluvial Plains (2.32 per cent), Mootwingee-Wonnaminta Sandplains (2.31 per cent) and Tibooburra Sandplains (2.27 per cent).
At the landscape scale, this bioregion is not comprehensively conserved. Of the 33 landscapes occurring in the bioregion, only 17 are represented in any of the conservation tenures and only 7 are reserved. Both endemic landscapes have some representation in conservation tenures although only one is reserved.
The most noticeable form of clearing measured in this report, namely that of native canopy, is indicated to be intact for this bioregion for all landscapes.
National parks and nature reserves
Seven landscapes occur in Sturt National Park. Of these, 2 (Tibooburra Fresh Lakes and Swamps at 6,817.75 hectares or 27.91 per cent and Tibooburra Downs 9,280.79 hectares or at 24.09 per cent), have more than 20 per cent of their bioregional area represented in the national park.
Two more landscapes (Tibooburra Salt Lakes and Playas at 2,897.39 hectares or 18.71 per cent of its bioregional area and Sturt Linear Dunes at 91,866.67 hectares or 10.39 per cent of its bioregional area) have more than 10 per cent of their area reserved. Of note, the Tibooburra Salt Lakes and Playas landscape can be considered endemic to the NSW portion of this bioregion.
Three landscapes are represented in the Aboriginal area:
- Bulloo Channels and Floodouts 530.75 hectares or 0.03 per cent of its bioregional area;
- Bulloo Littoral and Lunettes 34787.27 hectares or 1.65 per cent of its bioregional area; and
- Tibooburra Tablelands 25687.41 hectares or 1.22 per cent of its bioregional area.
Only one landscape, the Tibooburra Tablelands landscape, is also represented in national parks and nature reserves.
Fourteen landscapes occur in wildlife refuges and for some this is a significant proportion of their bioregional area. These are Bulloo Channels and Floodouts (52.14 per cent), Bulloo Sandplains (46.51 per cent), White Cliffs Alluvial Plains (28.20 per cent), Tibooburra Sandplains (22.63 per cent), Bulloo Linear Dunes (21.96 per cent) and Ursino Sandplains (18.26 per cent). Nine of the 14 landscapes represented in wildlife refuges do not occur in the Sturt National Park. These are:
- Ursino Alluvial Plains with 226.37 hectares or 0.37 per cent of its bioregional area;
- Bulloo Channels and Floodouts with 276.72 hectares or 52.14 per cent of its bioregional area;
- Ursino Tablelands and Downs with 1,039.26 hectares or 9.41 per cent of its bioregional area;
- Bulloo Littoral and Lunettes with 2,410.12 hectares or 6.93 per cent of its bioregional area;
- Ursino Sandplains with 4,841.73 hectares or 18.26 per cent of its bioregional area;
- Ursino Linear Dunes with 6,115.18 hectares or 3.00 per cent of its bioregional area;
- White Cliffs Alluvial Plains with 7,402.77 hectares or 28.20 per cent of its bioregional area;
- Bulloo Salt Lakes and Playas with 9,215.88 hectares or 14.47 per cent of its bioregional area;
- Bulloo Sandplains with 10,029.26 hectares or 46.51 per cent of its bioregional area and
- Bulloo Linear Dunes with 56,677.99 hectares or 21.96 per cent of its bioregional area.
Page last updated: 27 February 2011