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Like the ‘Difficulty of creation’, the ‘Difficulty of enhancement' risk multiplier is also determined as a function of habitat distinctiveness and condition, subsequently resulting in categorisation into three discrete bins of ‘Low’ to ‘High’ corresponding to a three-point scale of ‘.67’ to ‘1’ which represents the numerical coefficients with which the former two are multiplied. A lower coefficient would yield a final lower HBU composite score, while the converse is true. Thus, the product of habitat distinctiveness, condition and coefficient consequently comprise HBU delivered for each habitat assessed.
Habitats may be enhanced according to either condition or distinctiveness. The following example pertains to the condition enhancement of existing baseline habitats (see table below). HBU is calculated as the product of area, distinctiveness, condition and the enhancement multiplier. Note the range of the enhancement multiplier according to difficulty. Enhancing habitat distinctiveness is discussed in the section on trading rules later.
The following figure depicts the calculated HBU for newly proposed sample habitats to be created as it appears in the SGBA (columns truncated for easier reading).
Table. SGBA sample calculations for proposed habitat condition enhancement.
To access the above, click on the relevant SGBA sheet(s) as shown below (see Resources to access the SGBA metric):
A more comprehensive representation of calculations in one of the tables above is presented below.
Table: Sample calculations for proposed habitat condition enhancement.
ha.: hectares.
HBU: Habitat Biodiversity Units.
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