Document ID: chunk:federal_register_of_legislation:F2025L00287:reg:3:p190
Version: federal_register_of_legislation:F2025L00287
Segment Type: reg
Provision Reference: reg 3 (pt 190/276)
Character Range: 701852–705181

from/change of habitat because of weed invasion                                                    Almost certain (91–100%)  Major        Extreme
12. Infection by pathogens already present                                                                         Rare (0–10%)              Negligible   Negligible
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%)  Extreme      Extreme

Management actions
Undertake propagation and planting within suitable shaded areas. Undertake targeted weed control and maintenance.
The Lord Howe Island Biodiversity Management Plan covers the recovery needs of this species on the Lord Howe Island group. Possible future actions may need to be undertaken in collaboration with the NSW Government as appropriate.

Recovery target
The recovery target is shown in Table 76.
Table 76 Recovery target for Calystegia affinis
EPBC Act status        Estimated population (2023)  Where known populations occur  2034 target
Critically Endangered  28 groups of plants          100% in the national park      100 groups of plants

Relevant literature
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 Unpublished report to the Australian National Parks and Wildlife Service, Norfolk Island.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.

Clematis dubia—clematis
Family RANUNCULACEAE

Conservation significance
Endemic to Norfolk Island.
EPBC Act Listing Status: Critically Endangered.

Description
A woody vigorous climber with hairy white flowers.

Distribution and abundance
Sykes and Atkinson (1988) note this vine was once common in the Mt Pitt and Mt Bates area but was not seen during surveys that year. In 2003 the natural population was confined to Norfolk Island National Park where there were 15 mature individuals recorded (TSSC 2003a).
Mills (2012b) found 53 plants but recorded only 3 as large plants. Seedlings were regularly found along transects. The species was also found on private land.
The population estimate has since increased to 303 individuals in 2021 through propagation and planting as part of the Norfolk Island National Park threatened flora program.
The distribution is shown in Map 30.

Ecology
This species will grow in light gaps and seeds rarely (every 4 to 5 years).

Habitat
This species grows on the forest margins and in clearings.

Threats
Weed invasion and competition.

Impact on other species
None known.
Map 30 Distribution of Clematis dubia
Green outlines indicate reserves within which the species occurs.

Risk assessment
Risk assessment undertaken for Critically Endangered vines/climbers as a grouping. The risk assessment is shown in Table 77.
Table 77 Risk