Nature conservation

Biodiversity Reform

Sydney Basin - 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

The Sydney Basin Bioregion is covered by 241 landscapes (NPWS in prep). The majority of the landscapes occupy less than 1 per cent of the bioregion, and the dominant landscape is Landscape 690, occupying 401,000 hectares or 11.24 per cent of the bioregion.

National parks and nature reserves

One hundred and seventy-eight of the 240 landscapes in the Sydney Basin are included in the system of national parks and nature reserves.

Ninety-four landscapes have greater than 20 per cent of their bioregional area included in the reserve system. Eight landscapes across the full range of ruggedness and with varying geology have 100 per cent of their area included. Thirteen landscapes of variable type have between 90 and 99 per cent of their area included in national parks and nature reserves and 39 landscapes have between 50 and 89 per cent of their bioregional area included in the reserve system (eight between 80 and 89 per cent, 11 between 70 and 79 per cent, 8 between 60 and 69 per cent and 12 between 50 and 59 per cent).

Landscape 690, the dominant landscape (by area), is also the most highly reserved landscape in terms of area reserved, with 311235.71 hectares or 77.61 per cent of its bioregional area contained in the reserve system.

Historic sites

Five low to moderate ruggedness sedimentary or alluvial landscapes are represented in historic sites in the bioregion. As is usually the case, historic sites involve only small areas and percentages of landscapes. Each of these landscapes is also represented to a greater or lesser degree in the reserve system. These landscapes are:

  • Landscape 733 with 2.45 hectares or <0.01 per cent of its bioregional area;
  • Landscape 748 with 2.93 hectares or 0.08 per cent of its bioregional area;
  • Landscape 742 with 18.44 hectares or 0.18 per cent of its bioregional area;
  • Landscape 732 with 30.43 hectares 0.02 per cent of its bioregional area; and
  • Landscape 987 with 73.98 hectares or 0.19 per cent of its bioregional area.

 

Aboriginal areas

Seven landscapes with varying ruggedness and geology are represented in Aboriginal areas. A greater area of the landscapes included in Aboriginal areas are represented in the reserve system, while two of the landscapes have greater than half of their bioregional area protected within national parks and nature reserves. The areas and proportion of each of these landscapes is listed below:

  • Landscape 733 with 0.64 hectares or <0.01 per cent of its bioregional area;
  • Landscape 1087 with 2.98 hectares or 0.05 per cent of its bioregional area;
  • Landscape 701 with 3.58 hectares or <0.01 per cent of its bioregional area;
  • Landscape 732 with 4.77 hectares or <0.01 per cent of its bioregional area;
  • Landscape 806 with 6.98 hectares or 0.02 per cent of its bioregional area;
  • Landscape 809 with 9.27 hectares or 0.02 per cent of its bioregional area; and
  • Landscape 1060 with 44.36 hectares or 1.48 per cent of its bioregional area.

 

State recreation areas

Fifty-three of the Sydney Basin landscapes are represented in the state recreation areas. One hundred per cent of Landscape 955 (a relatively small landscape of 200 ha) is included in these areas. Only one other landscape, the moderate ruggedness alluvial Landscape 972 (which at 0.02 hectares is the most minimally represented in the SRA), is not also represented in national parks and nature reserves.

Regional parks

The Sydney Basin Bioregion is the only one to provide regional parks to urbanised areas of the bioregion. Ten low to moderate ruggedness landscapes with sedimentary or alluvial geology are represented in the regional parks of the Sydney Basin Bioregion. The areas and proportion of each represented in these parks are listed below. All are represented to a greater degree in the system of national parks and nature reserves.

  • Landscape 782 with 5.06 hectares or 0.09 per cent of its bioregional area;
  • Landscape 739 with 31.46 hectares or 0.04 per cent of its bioregional area;
  • Landscape 858 with 111.82 hectares or 0.21 per cent of its bioregional area;
  • Landscape 848 with 155.71 hectares or 0.47 per cent of its bioregional area;
  • Landscape 781 with 190.06 hectares or 5.76 per cent of its bioregional area;
  • Landscape 869 with 266.25 hectares or 38.04 per cent of its bioregional area;
  • Landscape 880 with 276.45 hectares or 6.14 per cent of its bioregional area;
  • Landscape 850 with 699.34 hectares or 0.39 per cent of its bioregional area;
  • Landscape 809 with 1412.05 hectares or 2.78 per cent of its bioregional area; and
  • Landscape 806 with 1524.74 hectares or 3.31 per cent of its bioregional area.

 

Crown reserves

The area of Crown reserves managed by the NPWS in the Sydney Basin Bioregion encompasses 11 landscapes. While the geology of these landscapes is primarily sedimentary, the ruggedness varies. All are well represented in the system of national parks and nature reserves and only 2 (456 and 975) have less than 20 per cent of their area included in national parks and nature reserves.

  • Landscape 456 with 0.09 hectares or <0.01 per cent of its bioregional area;
  • Landscape 638 with 3.63 hectares or <0.01 per cent of its bioregional area;
  • Landscape 975 with 6.65 hectares or 0.03 per cent of its bioregional area;
  • Landscape 992 with 10.37 hectares or 0.07 per cent of its bioregional area;
  • Landscape 1012 with 19.79 hectares or 0.06 per cent of its bioregional area;
  • Landscape 994 with 19.95 hectares or 0.34 per cent of its bioregional area;
  • Landscape 989 with 43.33 hectares or 1.14 per cent of its bioregional area;
  • Landscape 1000 with 85.52 hectares or 17.10 per cent of its bioregional area;
  • Landscape 1023 with 153.93 hectares or 0.48 per cent of its bioregional area;
  • Landscape 1038 with 176.32 hectares or 25.19 per cent of its bioregional area; and
  • Landscape 1011 with 680.36 hectares or 0.98 per cent of its bioregional area.

 

Flora reserves

Twelve landscapes are included in flora reserves in the Sydney Basin Bioregion. The majority (but not all) are on low to moderate ruggedness with a sedimentary geology and are sourced from a few subregions. Only one (landscape 772) does not occur in the system of national parks and nature reserves. Eight of the 11 landscapes have less than 20 per cent of their area represented. Given the relatively high security of flora reserves, their contribution towards management of landscapes with low reservation status is important.

  • Landscape 772 with 1.28 hectares or 0.64 per cent of its bioregional area;
  • Landscape 749 with 4.81 hectares or 0.04 per cent of its bioregional area;
  • Landscape 691 with 4.94 hectares or 0.01 per cent of its bioregional area;
  • Landscape 920 with 10.82 hectares or 0.07 per cent of its bioregional area;
  • Landscape 986 with 18.98 hectares or 0.12 per cent of its bioregional area;
  • Landscape 696 with 36.00 hectares or 0.47 per cent of its bioregional area;
  • Landscape 757 with 68.72 hectares or 1.21 per cent of its bioregional area;
  • Landscape 919 with 78.84 hectares or 0.18 per cent of its bioregional area;
  • Landscape 589 with 97.64 hectares or 0.28 per cent of its bioregional area;
  • Landscape 747 with 157.54 hectares or 0.27 per cent of its bioregional area;
  • Landscape 846 with 178.80 hectares or 0.78 per cent of its bioregional area; and
  • Landscape 690 with 482.87 hectares or 0.12 per cent of its bioregional area.

 

Voluntary conservation agreements

VCAs on land in the Sydney Basin cross 12 landscapes. The majority of these landscapes are of low to moderate ruggedness with sedimentary geology, and the source subregions vary. As with VCAs generally, the areas conserved are relatively small although one landscape (Landscape 993), a low ruggedness igneous landscape, is not represented in the system of national parks and nature reserves and seven others (927, 937, 858, 717, 850, 848 and 975) have lower than 20 per cent representation in this system.

  • Landscape 975 with 0.35 hectares or <0.01 per cent of its bioregional area;
  • Landscape 993 with 1.08 hectares or 0.01 per cent of its bioregional area;
  • Landscape 732 with 10.10 hectares or 0.01 per cent of its bioregional area;
  • Landscape 1011 with 10.67 hectares or 0.02 per cent of its bioregional area;
  • Landscape 848 with 14.40 hectares or 0.04 per cent of its bioregional area;
  • Landscape 850 with 18.13 hectares or 0.01 per cent of its bioregional area;
  • Landscape 996 with 19.54 hectares or 0.53 per cent of its bioregional area;
  • Landscape 992 with 21.97 hectares or 0.16 per cent of its bioregional area;
  • Landscape 717 with 65.63 hectares or 0.20 per cent of its bioregional area;
  • Landscape 858 with 77.55 hectares or 0.14 per cent of its bioregional area;
  • Landscape 937 with 85.03 hectares or 0.27 per cent of its bioregional area; and
  • Landscape 927 with 279.59 hectares or 0.29 per cent of its bioregional area.

 

Wildlife refuges

Sixty-five landscapes are represented in the wildlife refuge program. This makes it the second (one landscape less than special catchment areas) largest contributor (albeit a less certain contribution than special catchment areas both in terms of security and degree of active management) to conservation tenures outside the reserve system.

Six of these are not represented in national parks and nature reserves. Another 31 have less than 20 per cent of their bioregional area included in this system of reserves. Landscapes not also represented in national parks and nature reserves include:

  • Landscape 610 with 130.38 hectares or 9.31 per cent of its bioregional area;
  • Landscape 993 with 47.80 hectares or 0.33 per cent of its bioregional area;
  • Landscape 680 with 17.49 hectares or 5.83 per cent of its bioregional area;
  • Landscape 1019 with 17.52 hectares or 17.52 per cent of its bioregional area;
  • Landscape 1039 with 3.19 hectares or 0.53 per cent of its bioregional area; and
  • Landscape 997 with 139.33 hectares or 5.57 per cent of its bioregional area.

 

Property agreements

Seventeen landscapes have been included in property agreements. A small area (4.54 hectares or 0.18 per cent of its bioregional area) of one landscape (997), which is also represented in the wildlife refuge program, does not also occur in the reserve system. Ten others have less than 20 per cent representation in the reserve system; their areas, proportions and descriptions are included below and in the text box.

  • Landscape 985 with 0.14 hectares or <0.01 per cent of its bioregional area;
  • Landscape 850 with 0.60 hectares or <0.01 per cent of its bioregional area;
  • Landscape 989 with 0.63 hectares or 0.02 per cent of its bioregional area;
  • Landscape 746 with 1.38 hectares or <0.01 per cent of its bioregional area;
  • Landscape 990 with 2.77 hectares or 0.03 per cent of its bioregional area;
  • Landscape 747 with 2.78 hectares or <0.01 per cent of its bioregional area;
  • Landscape 986 with 5.46 hectares or 0.04 per cent of its bioregional area;
  • Landscape 975 with 16.40 hectares or 0.08 per cent of its bioregional area;
  • Landscape 987 with 18.15 hectares or 0.05 per cent of its bioregional area; and
  • Landscape 998 with 147.76 hectares or 0.74 per cent of its bioregional area.

 

Special catchment areas

Sixty-six landscapes are included in these lands. Six of these landscapes have no representation in the reserve system and 27 others have less than 20 per cent of their area included in the reserve system. The areas and proportion of landscape included in SCA lands where these are not also represented in the reserve system are listed below:

  • Landscape 999 with 13.20 hectares or 6.60 per cent of its bioregional area;
  • Landscape 885 with 98.78 hectares or 98.78 per cent of its bioregional area;
  • Landscape 964 with 99.85 hectares or 49.93 per cent of its bioregional area;
  • Landscape 997 with 664.02 hectares or 26.56 per cent of its bioregional area;
  • Landscape 988 with 799.13 hectares or 88.79 per cent of its bioregional area; and
  • Landscape 962 with 1765.36 hectares or 73.56 per cent of its bioregional area.

 

Conservation and clearing

Almost one third, 1,173,400 hectares or 32.9 per cent of the Sydney Basin Bioregion, has been cleared of native canopy vegetation. Just under half (119) of the 241 landscapes are more than 30 per cent cleared (25 are 100 per cent cleared, 33 in the 70-99 per cent range of clearing, 30 in the 50-70 per cent clearing range and 32 between 30 and 49 per cent cleared). Forty-nine of the landscapes in the Sydney Basin are not included in any conservation tenures and only 71 of those landscapes in the 30-99 per cent clearing range are included in the system of national parks and nature reserves.

Those landscapes having low representation in the more secure forms of conservation management (national parks/nature reserves, flora reserves, voluntary conservation agreement and property agreement, if perpetual, and particularly those which are highly cleared) are priorities for conservation or restoration.

Profiles of landscapes referred to above
Landscape numberDescription
456
Landscape 456 is an area of low ruggedness with a dominant geology of sedimentary (mixed grain) occurring in subregion BBS24 - Pilliga.
610
Landscape 610 is an area of low ruggedness with a dominant geology of acid igneous intrusives occurring in subregion NSS1 - Northern Inland Slopes (NIS), Upper Slopes.
638
Landscape 638 is an area of low ruggedness with a dominant geology of sedimentary (mixed grain) occurring in subregion SB1 - Kerrabee.
680
Landscape 680 is an area of low ruggedness with a dominant geology of eastern alluvials occurring in subregion NSS1 - Northern Inland Slopes (NIS), Upper Slopes.
690
Landscape 690 is an area of moderate ruggedness with a dominant geology of sedimentary (mixed grain) occurring in subregion SB4 - Wollemi.
717
Landscape 717 is an area of low ruggedness with a dominant geology of sedimentary (mixed grain) occurring in subregion SB5 - Yengo.
732
Landscape 732 is an area of moderate ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion SB5 - Yengo.
733
Landscape 733 is an area of low ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion SB5 - Yengo.
739
Landscape 739 is an area of moderate ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion SB4 - Wollemi.
742
Landscape 742 is an area of moderate ruggedness with a dominant geology of eastern alluvials occurring in subregion SB5 - Yengo.
746
Landscape 746 is an area of low ruggedness with a dominant geology of sedimentary (mixed grain) occurring in subregion SB6 - Wyong.
747
Landscape 747 is an area of moderate ruggedness with a dominant geology of sedimentary (mixed grain) occurring in subregion SB6 - Wyong.
748
Landscape 748 is an area of low ruggedness with a dominant geology of eastern alluvials occurring in subregion SB5 - Yengo.
781
Landscape 781 is an area of moderate ruggedness with a dominant geology of eastern alluvials occurring in subregion SB4 - Wollemi.
782
Landscape 782 is an area of low ruggedness with a dominant geology of eastern alluvials occurring in subregion SB4 - Wollemi.
806
Landscape 806 is an area of low ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion SB7 - Pittwater.
809
Landscape 809 is an area of moderate ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion SB7 - Pittwater.
848
Landscape 848 is an area of low ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion SB8 - Cumberland.
850
Landscape 850 is an area of low ruggedness with a dominant geology of sedimentary (fine grain-non calcareous) occurring in subregion SB8 - Cumberland.
858
Landscape 858 is an area of low ruggedness with a dominant geology of eastern alluvials occurring in subregion SB8 - Cumberland.
869
Landscape 869 is an area of moderate ruggedness with a dominant geology of sedimentary (fine grain-non calcareous) occurring in subregion SB7 - Pittwater.
880
Landscape 880 is an area of low ruggedness with a dominant geology of sedimentary (fine grain-non calcareous) occurring in subregion SB7 - Pittwater.
885
Landscape 885 is an area of moderate ruggedness with a dominant geology of acid igneous intrusives occurring in subregion SEH8 - Kanangra.
927
Landscape 927 is an area of low ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion SB10 - Cataract.
937
Landscape 937 is an area of moderate ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion SB10 - Cataract.
955
Landscape 955 is an area of low ruggedness with a dominant geology of acid igneous intrusives occurring in subregion SEH7 - Bungonia.
962
Landscape 962 is an area of low ruggedness with a dominant geology of sedimentary (mixed grain) occurring in subregion SB10 - Cataract.
964
Landscape 964 is an area of moderate ruggedness with a dominant geology of eastern alluvials occurring in subregion SB10 - Cataract.
972
Landscape 972 is an area of moderate ruggedness with a dominant geology of eastern alluvials occurring in subregion SB12 - Illawarra.
975
Landscape 975 is an area of moderate ruggedness with a dominant geology of sedimentary (mixed grain) occurring in subregion SB12 - Illawarra.
985
Landscape 985 is an area of moderate ruggedness with a dominant geology of sedimentary (fine grain-non calcareous) occurring in subregion SB11 - Moss Vale.
986
Landscape 986 is an area of low ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion SB11 - Moss Vale.
987
Landscape 987 is an area of low ruggedness with a dominant geology of sedimentary (fine grain-non calcareous) occurring in subregion SB11 - Moss Vale.
988
Landscape 988 is an area of moderate ruggedness with a dominant geology of basic/intermediate igneous & associated sediments & metasediments occurring in subregion SB10 - Cataract.
989
Landscape 989 is an area of high ruggedness with a dominant geology of sedimentary (mixed grain) occurring in subregion SB12 - Illawarra.
990
Landscape 990 is an area of low ruggedness with a dominant geology of basic/intermediate igneous & associated sediments & metasediments occurring in subregion SB11 - Moss Vale.
992
Landscape 992 is an area of moderate ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion SB11 - Moss Vale.
993
Landscape 993 is an area of low ruggedness with a dominant geology of basic/intermediate igneous & associated sediments & metasediments occurring in subregion SB12 - Illawarra.
994
Landscape 994 is an area of moderate ruggedness with a dominant geology of sedimentary (mixed grain) occurring in subregion SB11 - Moss Vale.
996
Landscape 996 is an area of high ruggedness with a dominant geology of basic/intermediate igneous & associated sediments & metasediments occurring in subregion SB12 - Illawarra.
997
Landscape 997 is an area of low ruggedness with a dominant geology of eastern alluvials occurring in subregion SB11 - Moss Vale.
998
Landscape 998 is an area of moderate ruggedness with a dominant geology of basic/intermediate igneous & associated sediments & metasediments occurring in subregion SB12 - Illawarra. Profiles of Landscapes 999, 885, 964, 997, 988 and 962
999
Landscape 999 is an area of low ruggedness with a dominant geology of sedimentary (mixed grain) occurring in subregion SB11 - Moss Vale.
1000
Landscape 1000 is an area of high ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion SB11 - Moss Vale.
1011
Landscape 1011 is an area of moderate ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion SB13 - Ettrema.
1012
Landscape 1012 is an area of moderate ruggedness with a dominant geology of sedimentary (mixed grain) occurring in subregion SB13 - Ettrema.
1019
Landscape 1019 is an area of moderate ruggedness with a dominant geology of acid volcanics (extrusives) & associated sediments occurring in subregion SB12 - Illawarra.
1023
Landscape 1023 is an area of low ruggedness with a dominant geology of sedimentary (coarse grain) occurring in subregion SB13 - Ettrema.
1038
Landscape 1038 is an area of moderate ruggedness with a dominant geology of acid volcanics (extrusives) & associated sediments occurring in subregion SB13 - Ettrema.
1039
Landscape 1039 is an area of low ruggedness with a dominant geology of eastern alluvials occurring in subregion SB13 - Ettrema.

Page last updated: 18 April 2016