EMROP: Waihi North Project WAI-985-000-PLN-LC-0001_Rev0 clean 2.4 ACCOUNTING MODEL RESULTS The biodiversity values of SNA 166 and the Western Fragment are described in detail in Bioresearches (2022). The differences in structure and diversity of the components of the different vegetation types (rewarewa dominant, treefern dominant, Western Fragment) are recognised in three separate BOAMs (Table 3, Table 4, Table 5). These models demonstrate that, for each biodiversity component, there will be a net biodiversity gain at 20 years of maturity of plantings undertaken to offset the loss. The values presented within each BOAM are explained in subsequent tables (Table 6, Table 7, and Table 8), as informed by planting schedules (refer Section 2.6) and 20 x 20 m plots undertaken at four other 20 year old broadleaved forest plantings (comprised of similar species composition) in the Auckland Region (Sullivan et al. 2009). A visual estimate of 15-year-old plantings within the OGNZL Waihi landholdings (approximately 5 m at 15 years, refer Figure 8 from Bioresearches 2022) provided confidence that the plantings examined in the Auckland Region will be a reliable indicator of expected growth targets. The outcomes of the BOAMs indicate, with high confidence, that a total of 16.5 ha of revegetation will offset the loss of 3.6 ha of rewarewa forest and 4.6 ha of treefern scrub within SNA 166 (Table 3, Table 4). A further 20 ha of enhancement within SNA 166, by way of pine tree management and infill planting, will offset the complete loss of 1.2 ha of the Western Fragment (Table 5).
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