Document ID: chunk:federal_register_of_legislation:F2023L01376:reg:6882602:p2
Version: federal_register_of_legislation:F2023L01376
Segment Type: reg
Provision Reference: reg 6882602 (pt 2/2)
Character Range: 51161–52637

Habitat critical to the survival of the species
Macadamia jansenii is found on alluvial terraces of a second order watercourse and on adjacent steep, rocky slopes at about 150 m above sea level, where it occurs on well drained, red brown, sandy clay loams (Gross and Weston 1992; Shapcott and Powell 2011). All known individuals are found within 20 m of a tributary of Granite Creek, Bulburin National Park. Macadamia jansenii is identified as occurring in Regional Ecosystem 12.12.13 (see Table 6). This form of simple notophyll vine forest is characterised by Araucaria cunninghamii (Hoop pine), Alangium villosum (Canary muskheart), Argyrodendron trifoliolatum (Brown tulip oak), Baloghia inophylla (Scrub bloodwood), Brachychiton discolor (Scrub bottletree), Dendrocnide photinophylla (Shiny-leaved stinging tree) and Harpullia pendula (Tulipwood).

Priority populations
The only known population of M. jansenii is summarised in Table 6. This is potentially comprised of up to four subpopulations; however, this cannot be confirmed until genetic analyses are completed (G. Hayward, 2019, pers. comm. 13 Nov). Information is provided on the site identifier (Site Id: MGA northing), location, tenure, habitat (cleared, RE number or unknown; population size (Pop Size), and conservation priority (very high, high or medium).
Table 6. Known populations of Macadamia jansenii in Australia
Site Id  Location                            Tenure         Habitat   Pop Size  Priority