|Study Area Description:
||Occuring in the transition between the Flinders Ranges to the north and west and the semi arid vegetation of the undulating plains of the eastern pastoral region. Rainfall varies greatly from 282mm/yr in the north to 400mm/yr in the south of the study area and local variations due to orographic effects. Topography also varies greatly with ranges consisting of mainly northerly striking quartzite and sandstone ridges, intervening lower areas of flate to undulating plains or low ridges and hills on rocks such as siltstone shale and calcareous mudstone. Soils are dominated by shallow gravelly reddish loams on hills and ridges and moderately deep duplex soils on fans and footslopes. The plains are dominated by low open shrublands of Maireana and Atriplex, with Tussock Grasslands in the Pekina area. Tall Shrubland communities on hils and footslopes and Woodlands of Callitris and mallee on the hogback ridges. Pockets of Myoporum and Callitris Low Woodlands and Stipa Grasslands still occur in the study area, but in greatly reduced numbers.
Ten 1:50 000 mapsheets south of latitude 32 degress and east of longitude 138 degress to latitude 33 degrees and longitude 139 degrees including Peterborough, Pekina, Orroroo, Willowie, Carrieton, Craddock, Yednalue, Willochra and Kanyaka townships.