Strategic Management Prospects v4.0 Species Forecast Report created on 05 February, 2024
A Species Forecast Report is a summary of currently available information, the predicted 50-year outlook for the species, and potential pathways to recovery through species-specific and landscape-scale actions.
The report collates data from a range of sources including the Victorian Biodiversity Atlas, Strategic Management Prospects (SMP), Specific Needs Assessments, Threatened Species Action Statements, the Genetic Risk Index, and the IUCN Common Assessment Method.
Species Forecast Reports are intended to be used in conjunction with SMP and other spatial outputs in NatureKit, and Action Statements where relevant.
For more information on Species Forecast Reports, SMP and other biodiversity decision support tools, including user guides, visit Choosing actions for nature webpage on the DEECA website.
| Taxon ID | 505441 |
| Scientific name | Hibbertia truncata |
| Common name | Port Campbell Guinea-flower |
| Group | Dicotyledons |
| FFG status | Endangered |
| EPBC status |
Prostrate to decumbent shrubs up to 40 cm high; branches pubescent to tomentose. Vestiture of tubercle-based stellate hairs. Leaves broadly obovate, 3.5-16(-19.4) mm long, 2-12(-16.2) mm wide, stellate-pubescent, puberulent, rarely glabrescent, juvenile leaves with dense simple hairs on lower leaf surface; petiole 0.4-1.2 mm long; apex truncate, often apiculate, rarely emarginate or rounded; margins narrow, scarcely recurved, lower surface exposed, central vein scarcely raised. Flowers on peduncles 3-16(-22) mm long, terminal on short branches, often with more than one flower growing from the same area, subtended by 1 linear bract, 1.3-1.5(-1.8) mm long, up to half the length of the sepals; sepals 3.6-5.5 mm long, subequal, stellate-tomentose; petals usually obovate, 6-10.6 mm long, slightly papillose, yellow; stamens 10-12; filaments connate for up to half their length; carpels 2, villous. The taxon flowers from September to November (VicFlora 2015). Suckering has been observed in H. truncata (Toelken 1998). Field observations indicate that adult plants are often densely intertwined and interlocked, an observation which may have led to the inference that the taxon is capable of root suckering. Adult individuals are typically 1-1.5 m tall, 1-2 m wide and 3-5 (-7) m long in the windward direction, frequently salt-pruned, accumulating dead branches at the base, reminiscent of divaricating shrubs of various genera e.g. Coprosma on coastal clifftops in New Zealand.
The taxon is located in coastal heath, rarely more inland. It is recorded only from a few localities in the vicinity of Peterborough and Port Campbell (OTPL) in the south west of Victoria, where it is often locally common. In the latter area it is one of the dominant plants of the local coastal vegetation. The taxon is locally common and conserved in Port Campbell National Park (Toelken 1998; VicFlora 2015).
The taxon grows on sandy soil or, sometimes, sand dunes, often locally common. It is usually associated with limestone in coastal heath (Toelken 1998; VicFlora 2015).
This table contains information on the genetic health of Port Campbell Guinea-flower, informed by recent work conducted by Monash University and cesar Pty Ltd (Kriesner et al. 2019; Kriesner and Weeks 2020). The project undertook genetic risk assessments of ~1,100 species of flora and fauna found in Victoria and generated a large database of available genetic and demographic data for these species. A framework was developed for combining these parameters into a Genetic Risk Index that classified species broadly into ‘Low’, ‘Moderate’, ‘High’, ‘Very High’ and ‘Uncertain’ risk categories. The Genetic Risk Index will continue to undergo refinement and validation to provide further insight into the genetic health of species in Victoria.
| Total Australian population size | 2,000 - 10,000 individuals |
| Australian distribution | Only occurs in Victoria |
| Dispersal capacity | Low: ~1km |
| Reproductive mode | Sexual: species reproduces sexually via male and female gametes |
| Average generation time | Perennial: longer-lived than annuals, but further estimate is not readily available |
| Victorian population trend since ~1975 | Population has been relatively stable |
| Inbreeding evidence | Not assessed |
| Genetic diversity | Not assessed |
| Genetic rescue potential | Redundant: very few or no populations in Victoria likely to be suffering from inbreeding depression |
| Genetic Risk Index | Moderate |
The Habitat Distribution Model (HDM) layer shows the modelled distribution of habitat for Port Campbell Guinea-flower in Victoria. Red shading indicates areas of habitat with relatively higher suitability, compared with yellow shaded areas. HDMs are developed by combining Victorian Biodiversity Atlas (VBA) occurrence records for the species with a range of environmental variables to predict where the most suitable habitat for the species is in Victoria. Species may not always occupy areas of suitable habitat. Threatening processes (prior or ongoing) and disturbance regimes (e.g. fire, timber harvesting) may stop species from occupying otherwise suitable habitat for periods of time. Management actions often focus on currently occupied areas, however management of unoccupied areas can also be important to allow populations to re-establish.
No Habitat Distrabution Model is currently available.
No Species Forecast data is available because Port Campbell Guinea-flower is not yet included in our decision-support tools.
A Species Forecast is the estimated likelihood of a species being present in 50 years time. The data for Species Forecasts is drawn from DEECA’s decision support tools, Strategic Management Prospects and Specific Needs Assessments.
Many species benefit from the management of widespread threats, such as weeds and pests, and the benefit of these landscape-scale actions to ~4,200 species is modelled in Strategic Management Prospects. In addition to landscape-scale actions, some species also need actions that improve or protect habitat at certain sites, such as nest boxes or hollow logs, or actions to improve certain populations, such as gene mixing or translocation.
As part of a continuous improvement program for our decision-support tools, we are working to expand the scope of actions modelled in Strategic Management Prospects, and to build the dataset of species benefits from location-specific and population-specific actions.
We can use this data to consider how different actions may benefit a species and examine how different types of on-ground management may contribute to a species’ recovery in 50 years, to develop a Species Forecast.
No Species Forecast data is available because Port Campbell Guinea-flower is not yet included in our decision-support tools.
The benefit data in SMP can be used to consider what the Port Campbell Guinea-flower’s prospects are if the landscape scale management actions in SMP are implemented.
No Species Prospects figure is available becuase Port Campbell Guinea-flower is not yet included in SMP.
For more information on the decision support tools, products and underlying data used in this report, and how the data is collected and developed into products, please visit the following links:
These links include information on how to provide data and feedback into these products.
The Species Forecast Reports will be updated periodically to reflect changes and improvements in the products and tools that inform them (e.g., following updates to SMP).
As the data contained in Species Forecast Reports is drawn from multi-species datasets, it is not currently possible to incorporate species-specific information or feedback directly.
For help or further information get in touch by visiting Choosing actions for nature webpage on the DEECA website.
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