Interim Biogeographic Regionalisation for Australia (IBRA) version 7.1 represents a landscape based approach to classifying the land surface of Australia. 89 biogeographic regions and 419 subregions have been delineated, each reflecting a unifying set of major environmental influences which shape the occurrence of flora and fauna and their interaction with the physical environment across Australia and its external territories (excluding Antarctica). IBRA Version 7.1 data consists of two datasets. IBRA regions, which is a larger scale regional classification of homogeneous ecosystems, and subregions, which are more localised. IBRA Version 7.1 is a minor update to IBRA Version 7.0 to coincide with the release of the CAPAD 2024 dataset to more closely conform to the Geoscience Australia (GA) Australia’s Land Borders (see https://pid.geoscience.gov.au/dataset/ga/140044). IBRA Version 7.0 regions and subregions are realigned to the updated GA jurisdiction borders in some locations. For example, the Victorian Riverina subregion runs along the NSW-Vic border, the border in this area is updated to better align with the river. IBRA Version 7.1 restores the South Bruny land mass portion of Bruny Island (Tas) back to the Southern Ranges region Southern Ranges subregion to which it was assigned in IBRA Version 6.1. The whole of Bruny Island was incorrectly assigned to the South East region and Tasmanian South East subregion in IBRA Version 7. IBRA Version 7.1, aligns Ball’s Pyramid (south of Lord Howe Island) to other coastal data sources.

Interim Biogeographic Regionalisation for Australia (IBRA) version 7.0 represents a landscape based approach to classifying the land surface of Australia. 89 biogeographic regions and 419 sub regions have been delineated, each reflecting a unifying set of major environmental influences which shape the occurrence of flora and fauna and their interaction with the physical environment across Australia and its external territories (excluding Antarctica). IBRA Version 7.0 data consists of two datasets. IBRA bioregions, which is a larger scale regional classification of homogenous ecosystems, and sub regions, which are more localised. IBRA Version 7.0 is the result of both significant changes to certain IBRA 6.1 boundaries, plus refinement of other boundaries due to better data availability amongst some states and territories, and alterations by the states/territories along state borders. The updated boundaries were jointly defined by the Commonwealth, State and Territory nature and conservation agencies. In this respect refinements were carried out to all mainland jurisdictions with significant changes in Queensland and South Australia. In addition, the dataset was also updated to more closely conform to the Geoscience Australia 1:100K State borders, and a standard coding/naming convention introduced (for both regions and sub-regions) resulting in differences to both names and codes used in earlier IBRA Versions.Various sources were used to delineate islands - these included the GA100K Admin layer plus the Australian Maritime Boundaries dataset, a Coral Sea dataset (held in ERIN) and the GA Commonwealth Fisheries 2006 dataset.

Interim Biogeographic Regionalisation for Australia (IBRA) version 7.0 represents a landscape based approach to classifying the land surface of Australia. 89 biogeographic regions and 419 sub regions have been delineated, each reflecting a unifying set of major environmental influences which shape the occurrence of flora and fauna and their interaction with the physical environment across Australia and its external territories (excluding Antarctica). IBRA Version 7.0 data consists of two datasets. IBRA bioregions, which is a larger scale regional classification of homogenous ecosystems, and sub regions, which are more localised. IBRA Version 7.0 is the result of both significant changes to certain IBRA 6.1 boundaries, plus refinement of other boundaries due to better data availability amongst some states and territories, and alterations by the states/territories along state borders. The updated boundaries were jointly defined by the Commonwealth, State and Territory nature and conservation agencies. In this respect refinements were carried out to all mainland jurisdictions with significant changes in Queensland and South Australia. In addition, the dataset was also updated to more closely conform to the Geoscience Australia 1:100K State borders, and a standard coding/naming convention introduced (for both regions and sub-regions) resulting in differences to both names and codes used in earlier IBRA Versions.Various sources were used to delineate islands - these included the GA100K Admin layer plus the Australian Maritime Boundaries dataset, a Coral Sea dataset (held in ERIN) and the GA Commonwealth Fisheries 2006 dataset.

Interim Biogeographic Regionalisation for Australia (IBRA) version 7.0 represents a landscape based approach to classifying the land surface of Australia. 89 biogeographic regions and 419 sub regions have been delineated, each reflecting a unifying set of major environmental influences which shape the occurrence of flora and fauna and their interaction with the physical environment across Australia and its external territories (excluding Antarctica). IBRA Version 7.0 data consists of two datasets. IBRA bioregions, which is a larger scale regional classification of homogenous ecosystems, and sub regions, which are more localised. IBRA Version 7.0 is the result of both significant changes to certain IBRA 6.1 boundaries, plus refinement of other boundaries due to better data availability amongst some states and territories, and alterations by the states/territories along state borders. The updated boundaries were jointly defined by the Commonwealth, State and Territory nature and conservation agencies. In this respect refinements were carried out to all mainland jurisdictions with significant changes in Queensland and South Australia. In addition, the dataset was also updated to more closely conform to the Geoscience Australia 1:100K State borders, and a standard coding/naming convention introduced (for both regions and sub-regions) resulting in differences to both names and codes used in earlier IBRA Versions. Various sources were used to delineate islands - these included the GA100K Admin layer plus the Australian Maritime Boundaries dataset, a Coral Sea dataset (held in ERIN) and the GA Commonwealth Fisheries 2006 dataset.

Interim Biogeographic Regionalisation for Australia (IBRA) version 7.0 represents a landscape based approach to classifying the land surface of Australia. 89 biogeographic regions and 419 sub regions have been delineated, each reflecting a unifying set of major environmental influences which shape the occurrence of flora and fauna and their interaction with the physical environment across Australia and its external territories (excluding Antarctica). IBRA Version 7.0 data consists of two datasets. IBRA bioregions, which is a larger scale regional classification of homogenous ecosystems, and sub regions, which are more localised. IBRA Version 7.0 is the result of both significant changes to certain IBRA 6.1 boundaries, plus refinement of other boundaries due to better data availability amongst some states and territories, and alterations by the states/territories along state borders. The updated boundaries were jointly defined by the Commonwealth, State and Territory nature and conservation agencies. In this respect refinements were carried out to all mainland jurisdictions with significant changes in Queensland and South Australia. In addition, the dataset was also updated to more closely conform to the Geoscience Australia 1:100K State borders, and a standard coding/naming convention introduced (for both regions and sub-regions) resulting in differences to both names and codes used in earlier IBRA Versions.Various sources were used to delineate islands - these included the GA100K Admin layer plus the Australian Maritime Boundaries dataset, a Coral Sea dataset (held in ERIN) and the GA Commonwealth Fisheries 2006 dataset.

IBRA regions represent a landscape based approach to classifying the land surface of Australia from a range of continental data on environmental attributes. 85 biogeographic regions have been delineated, each reflecting a unifying set of major environmental influences which shape the occurrence of flora and fauna and their interaction with the physical environment.IBRA Version 5.1 is the result of refinement of the IBRA Version 4 boundaries. These refined boundaries were jointly defined by the Commonwealth, State and Territory nature and conservation agencies. Following a Departmentally facilitated workshop on the revision of boundaries on 24 July 2000, spatial data refinements were undertaken by DEWHA in conjunction with relevant State / Territory agencies. Agreement from all contributing parties, to make the final IBRA5_1 dataset publicly available, was gained in November 2000.Nominal attributes for the IBRA are; climate, lithology/geology, landform, vegetation, flora and fauna, and landuse. The use of these attributes varies across the States and details can be found in "Revision of the Interim Biogeographic Regionalisation of Australia (IBRA) and Development of Version 5.1 - Summary Report", DEH, Sept 2000.

Interim Biogeographic Regionalisation for Australia (IBRA) version 6.1 represents a landscape based approach to classifying the land surface of Australia. 85 biogeographic regions and 405 sub regions have been delineated, each reflecting a unifying set of major environmental influences which shape the occurrence of flora and fauna and their interaction with the physical environment across Australia.The IBRA Version 6.1 data consists of two datasets. IBRA bioregions, which is a larger scale regional classification of homogenous ecosystems, and sub regions, which are more localised.IBRA Version 6.1 is the result of refinement of the IBRA Version 5.1 and version 6.0 boundaries due to better data availability amongst some states and territories and also based on alterations by the states/territories along the state borders. The refined boundaries were jointly defined by the Commonwealth, State and Territory nature and conservation agencies. Those jurisdictions to refine their data in this version of IBRA include New South Wales, Queensland, Victoria and Western Australia. There are 53 newly named sub regions and 5 have been renamed from version 5.1. Whilst there has been a refinement of sub-regional and associated bioregional boundaries in Qld, Vic and western NSW, the new sub-regions are found principally in eastern NSW. In WA changes relate to moving the western boundary of Yalgoo bioregion to the coast, truncating the northern portion of the Geraldton Sandplains bioregion.Nominal attributes that make up IBRA are: climate, lithology/geology, landform, vegetation, flora and fauna, and landuse. The use of these attributes varies across the jurisdictions and for further information individual jurisdictions should be contacted.

Interim Biogeographic Regionalisation for Australia (IBRA) version 6.1 represents a landscape based approach to classifying the land surface of Australia. 85 biogeographic regions and 405 sub regions have been delineated, each reflecting a unifying set of major environmental influences which shape the occurrence of flora and fauna and their interaction with the physical environment across Australia.The IBRA Version 6.1 data consists of two datasets. IBRA bioregions, which is a larger scale regional classification of homogenous ecosystems, and sub regions, which are more localised.IBRA Version 6.1 is the result of refinement of the IBRA Version 5.1 and version 6.0 boundaries due to better data availability amongst some states and territories and also based on alterations by the states/territories along the state borders. The refined boundaries were jointly defined by the Commonwealth, State and Territory nature and conservation agencies. Those jurisdictions to refine their data in this version of IBRA include New South Wales, Queensland, Victoria and Western Australia. There are 53 newly named sub regions and 5 have been renamed from version 5.1. Whilst there has been a refinement of sub-regional and associated bioregional boundaries in Qld, Vic and western NSW, the new sub-regions are found principally in eastern NSW. In WA changes relate to moving the western boundary of Yalgoo bioregion to the coast, truncating the northern portion of the Geraldton Sandplains bioregion.Nominal attributes that make up IBRA are: climate, lithology/geology, landform, vegetation, flora and fauna, and landuse. The use of these attributes varies across the jurisdictions and for further information individual jurisdictions should be contacted.

IBRA version 5.1 Sub-regions, like their parent regionalisation IBRA version 5.1, represent a landscape based approach to classifying the land surface of Australia from a range of continental data on environmental attributes, at a finer scale. 354 IBRA Sub-regions have been delineated, each reflecting a unifying set of major environmental influences which shape the occurrence of flora and fauna and their interaction with the physical environment.The IBRA Version 5.1 Sub-regions are the result of refinement of the IBRA Version 4 boundaries. These refined boundaries were jointly defined by the Commonwealth, State and Territory nature and conservation agencies. Following a DEH facilitated workshop on the revision of boundaries on 24 July 2000, spatial data refinements were undertaken by DEH in conjunction with relevant State / Territory agencies.Nominal attributes for the IBRA and IBRA Sub-regions are; climate, lithology/geology, landform, vegetation, flora and fauna, and landuse. The use of these attributes varies across the States.