Biodiversity

Species Profile and Threats Database


For information to assist proponents in referral, environmental assessments and compliance issues, refer to the Policy Statements and Guidelines (where available), the Conservation Advice (where available) or the Listing Advice (where available).
 
In addition, proponents and land managers should refer to the Recovery Plan (where available) or the Conservation Advice (where available) for recovery, mitigation and conservation information.

EPBC Act Listing Status Listed as Critically Endangered
Listing and Conservation Advices Commonwealth Listing Advice on Guichenotia seorsiflora (a shrub) (Threatened Species Scientific Committee (TSSC), 2009bc) [Listing Advice].
 
Commonwealth Conservation Advice on Guichenotia seorsiflora (a shrub) (Threatened Species Scientific Committee (TSSC), 2009bd) [Conservation Advice].
 
Recovery Plan Decision Recovery Plan not required, the approved conservation advice for the species provides sufficient direction to implement priority actions and mitigate against key threats (17/11/2009).
 
Adopted/Made Recovery Plans
Federal Register of
    Legislative Instruments
Amendment to the list of threatened species under section 178 of the Environment Protection and Biodiversity Conservation Act 1999 (86) (17/11/2009) (Commonwealth of Australia, 2009f) [Legislative Instrument].
 
State Government
    Documents and Websites
WA:Threatened flora of the Western Central Wheatbelt (Collins, J., 2009) [State Species Management Plan].
State Listing Status
WA: Listed as Critically Endangered (Wildlife Conservation Act 1950 (Western Australia): September 2013 list)
Scientific name Guichenotia seorsiflora [82693]
Family Sterculiaceae:Malvales:Magnoliopsida:Magnoliophyta:Plantae
Species author C.F.Wilkins
Infraspecies author  
Reference Wilkins, C.F. & Chappill, J.A. (2003) Australian Systematic Botany 16(3): 355-356, Figs 4 (map), 15 [tax. nov.]
Distribution map Species Distribution Map

This is an indicative distribution map of the present distribution of the species based on best available knowledge. See map caveat for more information.

Illustrations Google Images
http://florabase.calm.wa.gov.au/browse/profile/17289

Scientific name: Guichenotia seorsiflora

The species is conventionally accepted (Wilkins & Chappill 2003).

Guichenotia seorsiflora is a multi-stemmed shrub that can grow to 0.6 m high. The flowers are pink and cream, the petals are 10–14 mm long and the petalsane joined in their lower third. The leaves are 8–20 mm long, 1–2 mm wide, on a short stalk, and covered in white star-shaped hairs. The flowering period for the species is from July to September (Western Australian Herbarium 2005; Wilkins & Chappill 2003).

Guichenotia seorsiflora is endemic to Western Australia, and is known from four subpopulations in the Cunderdin and Corrigin areas, which are approximately 135 km to 205 km east of Perth (WA CALM 2006). G. seorsiflora is considered to have a very restricted geographic distribution (TSSC 2009bc). The extent of occurrence of the species is approximately 3700 km², with subpopulations located 50–100 km apart, and its estimated area of occupancy is less than 1 km² (WA CALM 2006). The species occurs on private property, road reserves and a nature reserve.

The species is located within the Avon Wheatbelt Interim Biogeographic Regionalisation for Australia Bioregion and the Avon Natural Resource Management Region (WA CALM 2006).

The geographic distribution of G. seorsiflora is highly fragmented and its remaining habitat is generally surrounded by cleared farmland. This lack of suitable habitat limits the geographic distribution of the species (TSSC 2009bc).

The population size of Guichenotia seorsiflora is approximately 110 mature plants. This figure was calculated using actual counts from population surveys undertaken in 2006 and 2008 (WA DEC 2008). The four subpopulations of this species are fragmented and exist within scattered patches of remnant vegetation, in areas which have been extensively cleared for agriculture (WA CALM 2006).

Guichenotia seorsiflora occurs on sandy clay with lateritic gravel and on breakaways (a lateritic ridge with a steep eroded slope) (Western Australian Herbarium, 2005). Associated species include Allocasuarina campestris, Round-fruit Banksia (Banksia sphaerocarpa), and Gastrolobium, Hibbertia and Banksia species (WA CALM 2006).

The main identified threats to Guichenotia seorsiflora are road maintenance works, inappropriate fire regimes, erosion and weed invasion, by the introduced Dodder Vine (Cuscuta species).

Road maintenance
Three subpopulations are vulnerable to road maintenance works, such as grading, chemical spraying, vegetation slashing, construction of drainage channels, and soil compaction by vehicle movement (TSSC 2009bc).

Fire frequency
While the effects of fire on the species are unknown, fire that is too frequent is likely to kill plants before they reach maturity, as well as degrade the surrounding habitat (TSSC 2009bc).

Soil erosion
Soil erosion threatens one subpopulation where surface water from the road travels down an old track, and has been eroding the breakaway where the species occurs. This also removes soil and disrupts the soil seed bank which may have a detrimental impact on recruitment (TSSC 2009bc).

Weed invasion
Weed invasion is a serious threat to one subpopulation, where Dodder Vine has been observed smothering plants (TSSC 2009bc).

Land clearing
A past threat to G. seorsiflora is land clearing. Land clearing for agriculture has reduced the amount of suitable habitat for the species (TSSC 2009bc).

Minister's Reasons for Recovery Plan Decision
The approved conservation advice for the species provides sufficient direction to implement priority actions and mitigate against key threats. Therefore, a recovery plan is not considered to be necessary at this time.

The Commonwealth Conservation Advice on Guichenotia seorsiflora (a shrub) (TSSC 2009bd) list the following research priorities:

  • Design and implement a monitoring program or, if appropriate, support and enhance existing programs.
  • More precisely assess population size, geographic distribution, ecological requirements and demographic information, including:
    • factors that trigger or influence germination and recruitment
    • the pollinating mechanism of the species and the requirements of pollinators
    • seed viability
    • conditions necessary for germination
    • the reproductive strategies, phenology and seasonal growth of the species
    • the species' response to disturbance
    • other relevant mortality and morphological data for the species.
  • Undertake survey work in suitable habitat and potential habitat to locate any additional populations/occurrences/remnants. Surveys should ideally be undertaken during the species' main flowering period (July to September).
  • Undertake seed germination and/or vegetative propagation trials to determine the requirement for successful establishment.

In addition, the Commonwealth Conservation Advice on Guichenotia seorsiflora (a shrub) (TSSC 2009bd) list the following priority actions:

  • Ensure road maintenance activities, involving substrate or vegetation disturbance in areas where G. seorsiflora occurs, do not adversely impact on the known subpopulations.
  • Where appropriate, mitigate against further soil erosion. This may include stabilising the breakaway, diverting water flows or returning the topsoil to the site for natural recruitment of local plant species (WA CALM 2006).
  • Monitor the progress of recovery, including the effectiveness of management actions and the need to adapt them if necessary.
  • Investigate formal conservation arrangements, management agreements and covenants on private land, and for crown and private land investigate inclusion in reserve tenure if possible.
  • Develop and implement a management plan for the control of Dodder Vine in the region.
  • Ensure chemicals or other mechanisms used to control Dodder Vine do not have a significant adverse impact on G. seorsiflora.
  • Develop and implement a suitable fire management strategy for G. seorsiflora.
  • Identify appropriate intensity and interval of fire to promote seed germination.
  • Where appropriate provide maps of known occurrences to local and state Rural Fire Services and seek inclusion of mitigative measures in bush fire risk management plans, risk register and/or operation maps.
  • Raise awareness of G. seorsiflora within the local community through site visits, signage (e.g. declared rare flora markers to help prevent disturbance at sites), local print and electronic media, and fact sheets/information brochures.
  • Maintain liaison with private landholders and land managers of land on which populations occur.
  • Maintain appropriate seed or germplasm collection and storage.
  • Investigate options for linking, enhancing or establishing additional populations.
  • Implement national translocation protocols (Vallee et al. 2004) if establishing additional populations is considered necessary and feasible.

The Commonwealth Conservation Advice on Guichenotia seorsiflora (a shrub) (TSSC 2009bd) provides a brief biological overview and managemanet recommendations.

The following table lists known and perceived threats to this species. Threats are based on the International Union for Conservation of Nature and Natural Resources (IUCN) threat classification version 1.1.

Threat Class Threatening Species References
Climate Change and Severe Weather:Habitat Shifting and Alteration:Habitat loss, modification and/or degradation Commonwealth Listing Advice on Guichenotia seorsiflora (a shrub) (Threatened Species Scientific Committee (TSSC), 2009bc) [Listing Advice].
Climate Change and Severe Weather:Habitat Shifting and Alteration:Habitat modification with associated erosion Commonwealth Listing Advice on Guichenotia seorsiflora (a shrub) (Threatened Species Scientific Committee (TSSC), 2009bc) [Listing Advice].
Human Intrusions and Disturbance:Human Intrusions and Disturbance:Mechanical disturbance during construction, maintanance or recreational activities Commonwealth Listing Advice on Guichenotia seorsiflora (a shrub) (Threatened Species Scientific Committee (TSSC), 2009bc) [Listing Advice].
Invasive and Other Problematic Species and Genes:Invasive Non-Native/Alien Species:Competition and/or habitat degradation Cuscuta campestris (Golden Dodder, Common Dodder, Dodder, Field Dodder, Angel's Hair, Beggar Vine, Love Vine, Strangle Vine, Five-angled Dodder, Western field Dodder) Commonwealth Listing Advice on Guichenotia seorsiflora (a shrub) (Threatened Species Scientific Committee (TSSC), 2009bc) [Listing Advice].
Invasive and Other Problematic Species and Genes:Invasive Non-Native/Alien Species:Competition and/or habitat degradation by weeds Commonwealth Listing Advice on Guichenotia seorsiflora (a shrub) (Threatened Species Scientific Committee (TSSC), 2009bc) [Listing Advice].
Natural System Modifications:Fire and Fire Suppression:Inappropriate and/or changed fire regimes (frequency, timing, intensity) Commonwealth Listing Advice on Guichenotia seorsiflora (a shrub) (Threatened Species Scientific Committee (TSSC), 2009bc) [Listing Advice].
Transportation and Service Corridors:Roads and Railroads:Development and/or maintenance of roads Commonwealth Listing Advice on Guichenotia seorsiflora (a shrub) (Threatened Species Scientific Committee (TSSC), 2009bc) [Listing Advice].

Threatened Species Scientific Committee (TSSC) (2009bc). Commonwealth Listing Advice on Guichenotia seorsiflora (a shrub). [Online]. Department of the Environment, Water, Heritage and the Arts. Canberra, ACT: Department of the Environment, Water, Heritage and the Arts. Available from: http://www.environment.gov.au/biodiversity/threatened/species/pubs/82693-listing-advice.pdf.

Threatened Species Scientific Committee (TSSC) (2009bd). Commonwealth Conservation Advice on Guichenotia seorsiflora (a shrub). [Online]. Department of the Environment, Water, Heritage and the Arts. Canberra, ACT: Department of the Environment, Water, Heritage and the Arts. Available from: http://www.environment.gov.au/biodiversity/threatened/species/pubs/82693-conservation-advice.pdf.

Vallee, L., T. Hogbin, L. Monks, B. Makinson, M. Matthes & M. Rossetto (2004). Guidelines for the translocation of threatened plants in Australia - Second Edition. Canberra, ACT: Australian Network for Plant Conservation.

Western Australia Department of Conservation and Land Management (WA CALM) (2006). Records held in CALM's Declared Flora Database and rare flora files. Perth, Western Australia: WA CALM.

Western Australia Department of Environment and Conservation (WA DEC) (2008). Records held in DEC's Declared Flora Database and rare flora files. Perth, Western Australia: WA DEC.

Western Australian Herbarium (2005). FloraBase - The Western Australian Flora. [Online]. Perth, Western Australia: Department of Conservation and Land Management. Available from: http://florabase.calm.wa.gov.au/.

Wilkins, C.F. & J.A. Chappill (2003). Taxonomic Revision of Guichenotia (Lasiopetaleae: Malvaceae s.l. or Sterculiaceae). Australian Systematic Botany. 16:355-356.

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This database is designed to provide statutory, biological and ecological information on species and ecological communities, migratory species, marine species, and species and species products subject to international trade and commercial use protected under the Environment Protection and Biodiversity Conservation Act 1999 (the EPBC Act). It has been compiled from a range of sources including listing advice, recovery plans, published literature and individual experts. While reasonable efforts have been made to ensure the accuracy of the information, no guarantee is given, nor responsibility taken, by the Commonwealth for its accuracy, currency or completeness. The Commonwealth does not accept any responsibility for any loss or damage that may be occasioned directly or indirectly through the use of, or reliance on, the information contained in this database. The information contained in this database does not necessarily represent the views of the Commonwealth. This database is not intended to be a complete source of information on the matters it deals with. Individuals and organisations should consider all the available information, including that available from other sources, in deciding whether there is a need to make a referral or apply for a permit or exemption under the EPBC Act.

Citation: Department of the Environment (2014). Guichenotia seorsiflora in Species Profile and Threats Database, Department of the Environment, Canberra. Available from: http://www.environment.gov.au/sprat. Accessed Wed, 17 Sep 2014 22:02:55 +1000.