Document ID: chunk:federal_register_of_legislation:F2025L00287:reg:3:p254
Version: federal_register_of_legislation:F2025L00287
Segment Type: reg
Provision Reference: reg 3 (pt 254/276)
Character Range: 926940–931153

throughout the national park. 180 plants were counted during 2012 making it one of the most common species seen during flora surveys. The survey found a range of plant age classes from small seedlings to plants climbing high into trees, and the species occurred on nearly all transects.
The distribution is shown in Map 67.

Ecology
Occurs in light gaps and is rather transient in its occurrence. Little else is known about the ecology of the species.

Habitat
This species is a locally common climber that primarily grows in gaps in the forest and around the edges, climbing high into trees (Mills 2012b).

Threats
Threats to the species include weed invasion and competition, cattle grazing, and predation of fruit by rodents.

Impact on other species
Climbs on other vegetation.
Map 67 Distribution of Zehneria baueriana
Green outlines indicate reserves within which the species occurs. Points show recorded locations (Mills 2009b).

Risk assessment
Risk assessment undertaken for Endangered vines/climbers as a grouping. The risk assessment is shown in Table 153.
Table 153 Risk assessment for Endangered vines/climbers as a grouping
Risk                                                                                                               Likelihood of exposure    Consequence  Threat rating
1. Loss and fragmentation of native vegetation through 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                                                                                            Almost certain (91–100%)  Negligible   Negligible
7. Predation by cats                                                                                               Rare (0–10%)              Negligible   Negligible
8. Predation or damage by chickens                                                                                 Rare (0–10%)              Negligible   Negligible
9. Predation by swamphens                                                                                          Rare (0–10%)              Negligible   Negligible
10. Predation by Argentine ant                                                                                     Rare (0–10%)              Negligible   Negligible
11. Competition from/change of habitat because of weed invasion                                                    Likely (51–90%)           Moderate     Medium
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                                      Possible (26–50%)         Moderate     Medium

Management actions
Conduct targeted weed control and maintenance around existing populations. Implement habitat protection and rehabilitation. Undertake seed propagation (when seed is available) and replanting in suitable habitat. Exclude or manage cattle grazing.

Recovery target
The recovery target is shown in Table 154.
Table 154 Recovery target for Zehneria baueriana
EPBC Act status  Estimated population (2023)  Where known populations occur  2034 target
Endangered       180 groups of plants         >95% within the national park  300 groups of plants

Relevant literature
Director of National Parks (2010) Norfolk