Nature conservation

Biodiversity Reform

Cobar Peneplain - conservation status analysis

This page shows the conservation status of the bioregion, based on protection of landscapes within formal conservation management mechanisms.

The numbered landscapes referred to in the text are described briefly in the table at the bottom of the page. These landscapes were identified in the State Conservation Monitoring Project. In this project, a total of 1167 landscapes were described, combining three layers: ruggedness, geology and subregions.

Landscape-scale conservation

Eighty-one landscapes occur in the Cobar Peneplain Bioregion (NPWS in prep). Two low ruggedness landscapes dominate the bioregion. These are Landscape 372 (occupying 826,400.00 hectares or 11.27 per cent of the bioregional area), and Landscape 579 (occupying 675,700.00 hectares of the bioregion or 9.21 per cent of the bioregional area). Almost three-quarters of the remaining landscapes individually occupy less than 1 per cent of the bioregional area. Just over half (45) of the bioregion's landscapes are represented in one or more of the areas managed for conservation.

National parks and nature reserves

Thirty-two of the 81 landscapes have some representation in national parks and nature reserves. Only 5 (some of which are relatively small) of the landscapes have greater than 20 per cent of their area included in this reserve system. These are:

  • Landscape 493 with 100.00 hectares or 100 per cent of its bioregional area;
  • Landscape 480 with 56.85 hectares or 56.85 per cent of its bioregional area;
  • Landscape 479 with 1461.54 hectares or 48.72 per cent of its bioregional area;
  • Landscape 364 with 391.10 hectares or 23.01 per cent of its bioregional area; and
  • Landscape 824 with 6014.43 hectares or 24.75 per cent of its bioregional area.

 

The dominant landscapes of the bioregion - Landscape 372 (with 794.19 hectares or 0.10 per cent of its bioregional area) and Landscape 579 (with 863.32 hectares or 0.13 per cent of its bioregional area) - have only limited representation in the reserve system.

Wildlife refuges

Twenty-five of the bioregional landscapes are represented in wildlife refuges on private properties. Of these, 100 per cent of two landscapes, 831 and 840 (both very small, about 100 hectares each), are wholly contained within refuges, and 53.49 per cent of landscape 506 is contained in a refuge. Ten landscapes found in wildlife refuges are not represented in the reserve program. These include:

  • Landscape 754 with 8,716.94 hectares or 19.81 per cent of its bioregional area;
  • Landscape 492 with 5,862.33 hectares or 1.75 per cent of its bioregional area;
  • Landscape 755 with 5,146.78 hectares or 7.16 per cent of its bioregional area;
  • Landscape 624 with 676.05 hectares or 0.38 per cent of its bioregional area;
  • Landscape 384 with 353.59 hectares or 2.17 per cent of its bioregional area;
  • Landscape 506 with 213.96 or 53.49 per cent of its bioregional area;
  • Landscape 581 with 130.51 hectares or 0.07 per cent of its bioregional area;
  • Landscape 820 with 106.92 hectares or 1.37 per cent of its bioregional area; and
  • Landscape 840 and Landscape 831, both up to 100 hectares and 100 per cent.

 

Flora reserve

Three landscapes (Landscape 577 with 1063.36 hectares or 1.14 per cent of its bioregional area, Landscape 615 with 169.73 hectares or 0.09 per cent of its bioregional area and Landscape 579 with 470.60 hectares or 0.07 per cent of its bioregional area) are conserved within the flora reserve. The 1063.36 hectares of landscape 577 is not represented in national parks and nature reserves.

Property agreements

Although 10 landscapes are represented in the conservation zone of property agreements, less than 1 per cent of their bioregional area is represented within this program. Five landscapes are represented in property agreements which are not included in national parks and nature reserves. These include:

  • Landscape 624 with 286.33 hectares or 0.16 per cent of its bioregional area;
  • Landscape 808 with 65.09 hectares or 0.83 per cent of its bioregional area;
  • Landscape 581 with 80.36 hectares or 0.04 per cent of its bioregional area;
  • Landscape 577 with 92.53 hectares or 0.10 per cent of its bioregional area; and
  • Landscape 812 with 127.55 hectares or 0.44 per cent of its bioregional area.

 

Historic site

Three landscapes (Landscape 500 with 126.93 hectares or 0.03 per cent of its bioregional area; Landscape 489 with 264.12 hectares or 0.10 per cent of its bioregional area and Landscape 492 with 974.04 hectares or 0.29 per cent of its bioregional area) are conserved within the Mt Grenfell Historic Site. The 974 hectares of one of these, Landscape 492, is not represented in national parks and nature reserves.

Conservation and clearing

About one-third (2,298,800 hectares or 31.34 per cent) of the Cobar Peneplain Bioregion has been cleared of its native canopy. About two-thirds of the landscapes have experienced this type of clearing (other forms of clearing, eg understorey and loss of condition, are not yet detectable at the all of state scale).

Four relatively small low to moderate ruggedness landscapes of varying geology (612, 830, 831, 840) are totally cleared. Eleven landscapes (448, 581, 604, 697, 756, 760, 769, 777, 803, 812, 820) are extremely cleared with 70-90 per cent of their bioregional area experiencing this degree of clearing and 6 landscapes (624, 646, 754, 755, 802, 823) are highly cleared with 50-70 per cent of their native canopy absent. Five landscapes (351, 517, 576, 579, 622) have greater than 30 per cent of their native canopy cleared.

Of those high to extremely cleared landscapes 3 landscapes (760, 802, 823) are represented in national parks and nature reserves. A wider range of 9 landscapes has representation in wildlife refuges. These are landscapes: 581, 624, 754, 755, 760, 777, 802, 820, 823. Three of these landscapes (823, 614, 812) are also represented in the conservation zones of property agreements.

All landscapes lacking at least minimal representation in high security conservation (national parks, nature reserves and flora reserves) are a priority for conservation. The remaining vegetated areas of highly cleared landscapes are a priority for conservation action including restoration, particularly if further clearing of the unprotected areas of these landscapes is likely.

Profiles of landscapes referred to above
Landscape numberDescription
364
Landscape 364 is an area of moderate ruggedness with a dominant geology of continental colluvial/ residual deposits occurring in subregion CP3 - Canbelego Downs
372
Landscape 372 is an area of low ruggedness with a dominant geology of sedimentary (mixed grain) occurring in subregion cp3 - Canbelego Downs).
384
Landscape 384 is an area of low ruggedness with a dominant geology of acid volcanics (extrusives) & associated sediments occurring in subregion CP3 - Canbelego Downs.
479
Landscape 479 is an area of moderate ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion CP3 - Canbelego Downs.
480
Landscape 480 is an area of high ruggedness with a dominant geology of continental colluvial/ residual deposits occurring in subregion CP3 - Canbelego Downs.
489
Landscape 489 is an area of low ruggedness with a dominant geology of western alluvials (inactive) occurring in subregion CP2 - Barnato Downs.
492
Landscape 492 is an area of low ruggedness with a dominant geology of sedimentary (mixed grain) occurring in subregion CP2 - Barnato Downs.
493
Landscape 493 is an area of low ruggedness with a dominant geology of sedimentary (calcareous) occurring in subregion cp3 - Canbelego Downs.
500
Landscape 500 is an area of low ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion CP2 - Barnato Downs.
506
Landscape 506 is an area of low ruggedness with a dominant geology of western floodplains (active) occurring in subregion CP2 - Barnato Downs.
577
Landscape 577 is an area of low ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion CP4 - Nymagee-Rankins Springs.
579
Landscape 579 is an area of low ruggedness with a dominant geology of continental colluvial/ residual deposits occurring in subregion cp4 - Nymagee-Rankins Springs.
581
Landscape 581 is an area of low ruggedness with a dominant geology of western alluvials (inactive) occurring in subregion CP4 - Nymagee-Rankins Springs.
612
Landscape 612 is a 300 hectares area of low ruggedness with a dominant geology of ultra basic igneous intrusives occurring in subregion CP4 - Nymagee - Rankins Springs.
615
Landscape 615 is an area of low ruggedness with a dominant geology of acid igneous intrusives occurring in subregion CP4 - Nymagee-Rankins Springs.
624
Landscape 624 is an area of low ruggedness with a dominant geology of acid metamorphics occurring in subregion CP4 - Nymagee-Rankins Springs.
754
Landscape 754 is an area of low ruggedness with a dominant geology of western floodplains (active) occurring in subregion CP5 - Lachlan Plains.
755
Landscape 755 is an area of low ruggedness with a dominant geology of western alluvials (inactive) occurring in subregion CP5 - Lachlan Plains.
760
Landscape 760 is an area of low ruggedness with a dominant geology of inland plain sediments occurring in subregion CP5 - Lachlan Plains.
777
Landscape 777 is an area of low ruggedness with a dominant geology of sedimentary (mixed grain) occurring in subregion CP5 - Lachlan Plains.
802
Landscape 802 is an area of moderate ruggedness with a dominant geology of inland plain sediments occurring in subregion CP5 - Lachlan Plains.
808
Landscape 808 is an area of moderate ruggedness with a dominant geology of acid volcanics (extrusives) & associated sediments occurring in subregion CP5 - Lachlan Plains.
812
Landscape 812 is an area of low ruggedness with a dominant geology of acid volcanics (extrusives) & associated sediments occurring in subregion CP5 - Lachlan Plains.
820
Landscape 820 is an area of low ruggedness with a dominant geology of inland sand dunes occurring in subregion CP5 - Lachlan Plains.
823
Landscape 823 is an area of low ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion CP5 - Lachlan Plains.
824
Landscape 824 is an area of moderate ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion CP5 - Lachlan Plains.
830
Landscape 830 is a 100 hectares area of moderate ruggedness with a dominant geology of sedimentary (mixed grain) occurring in subregion CP5 - Lachlan Plains.
831
Landscape 831 is a 100 hectares area of moderate ruggedness with a dominant geology of western alluvials (inactive) occurring in subregion CP5 - Lachlan Plains.
840
Landscape 840 is an area of moderate ruggedness with a dominant geology of western floodplains (active) occurring in subregion CP5 - Lachlan Plains.

Page last updated: 18 April 2016