Document ID: chunk:federal_register_of_legislation:F2025L00287:reg:3:p188
Version: federal_register_of_legislation:F2025L00287
Segment Type: reg
Provision Reference: reg 3 (pt 188/276)
Character Range: 694442–698629

past land clearing                                          Almost certain (91–100%)  Extreme      Extreme
2. Loss and fragmentation of native vegetation through current or future land clearing                             Rare (0–10%)              Negligible   Negligible
3. Degradation of native vegetation through past grazing or loss of nutrients                                      Almost certain (91–100%)  Extreme      Extreme
4. Degradation of native vegetation through current or future grazing                                              Possible (26–50%)         Moderate     Medium
6. Predation by rodents                                                                                            Likely (51–90%)           Minor        Medium
7. Predation by cats                                                                                               Rare (0–10%)              Negligible   Negligible
8. Predation or damage by chickens                                                                                 Likely (51–90%)           Moderate     Medium
9. Predation by swamphens                                                                                          Rare (0–10%)              Negligible   Negligible
10. Predation by Argentine ant                                                                                     Possible (26–50%)         Minor        Low
11. Competition from/change of habitat because of weed invasion                                                    Likely (51–90%)           Major        High
12. Infection by pathogens already present                                                                         Possible (26–50%)         Moderate     Medium
13. Impacts of potential new invasive species or pathogens                                                         Unlikely (11–25%)         Minor        Low
14. Changes to vegetation, increased fire risk and/or direct physiological stress as a result of climatic changes  Possible (26–50%)         Moderate     Medium
15. Problems caused by small populations, including lack of genetic diversity                                      Almost certain (91–100%)  Major        Extreme

Management actions
Implement targeted weed control and maintenance to promote natural regeneration around mature plants of B. australis australis just before seed drop (summer and autumn; Sykes & Atkinson 1988). Establish populations through propagation and planting in suitable gully habitats in the public reserves; manage or exclude cattle grazing.

Recovery target
The recovery target is shown in Table 74.
Table 74 Recovery target for Boehmeria australis australis
EPBC Act status        Estimated population (2023)  Where known populations occur  2034 target
Critically Endangered  591                          >95% within national park      1000

Relevant literature
Gilmour PM & Helman CE (1989a) A Survey of Quality Plant Communities of Norfolk Island Outside the national park. Report to the Australian National Parks and Wildlife Service, Norfolk Island.
Orchard A (ed) (1994) Flora of Australia. Vol. 49. Oceanic Islands 1. Australian Government Publishing Service, Canberra.
Mills K (2012b) The Flora of Norfolk Island. Report 14. The Endangered Plants in the national park: Field Survey and Review. Kevin Mills & Associates, Jamberoo, NSW.
Sykes W & Atkinson I (1988) Rare and Endangered Plants of Norfolk Island. Unpublished report to the Australian National Parks and Wildlife Service, Norfolk Island.
TSSC (Threatened Species Scientific Committee) (2003a) Commonwealth Listing Advice for Norfolk Island Flora – 11 Critically Endangered Species.

Calystegia affinis—a creeper
Family CONVOLVULACEAE

Conservation significance
Found only on Norfolk Island and Lord Howe Island.
EPBC Act Listing Status: Critically Endangered
State Listing Status: listed as Critically Endangered under the Biodiversity Conservation Act 2016 (NSW)
For further information on the species outside of the Norfolk Island Group, see the species profile on SPRAT.

Description
A thin stemmed climbing or creeping vine with sparse leaves.

Distribution and abundance
On Norfolk Island, 95%