The Gloucester subregion is part of the Northern Sydney Basin bioregion (Figure 3). The Northern Sydney Basin bioregion is located north-west of Sydney in eastern Australia. The bioregion adjoins the Northern Inland Catchments bioregion in the north-east and the Southern Sydney Basin bioregion in the South. It covers an area of about 17,390 km2.
Figure 3 Gloucester and Hunter subregions in the Northern Sydney Basin bioregion
Note: adjacent subregions within the Southern Sydney Basin bioregion and Northern Inland Catchment bioregion are also shown.
The Gloucester subregion covers about 347.5 km2 and is currently the smallest bioregional assessment subregion. The Gloucester subregion is defined by the geological Gloucester Basin (Roberts et al., 1991).
