Sub-asset stratification

Small patches of vegetation (<1ha extent) that are components of different broad vegetation groups under the QLD BVG or RE classification have been included within the mapped sub-assets. More information is provided on the merging of these sub-assets under Sub-assets section. Non vegetated areas such as rock and permanent waterbodies were also included within those sub-assets. Given the small extent of these patches, we consider the impact of their inclusion within other sub-assets as immaterial to the findings of this account.

Accuracy of vegetation mapping

Vegetation mapping is a challenging procedure requiring interpretation and extrapolation of field and remote sensing data. Some parts of the property have not been field-verified and it is possible that additional surveys may identify inaccuracies in digital vegetation mapping. Over time we expect that vegetation mapping of the property will improve.

Species identification

Some species could not be identified, particularly some coppicing Eucalypts and Acacias with juvenile foliage, and Eremophila species which were not flowering. However, as these were allocated unique ‘morpho taxa’ identifiers, this will not affect accounting for trees and shrubs as required by the Method. In some sites, it was difficult to determine the presence/extent of introduced pasture grasses. Apart from some buffel grass (Cenchrus sp.), Thooruna pastures are largely comprised of native grasses, with discrimination between native and introduced grasses determined through familiarity with the growth habit of some key species (Heteropogon contortus and Themeda triandra (native) Buffle, creeping bluegrass (introduced). Positive identification of native species was not possible as none were flowering, so estimating cover of non-native grasses in each plot was a matter of inference based on (a) cover of known species and (b) location and cover relative to species occurrences discussed with John Vander Have (property owner).