Split-Leaved Grevillea (Grevillea althoferorum) Interim Recovery Plan 2003-2008

Interim Recovery Plan No. 129
Gillian Stack and Val English
Department of Conservation and Land Management, WA, 2003

Summary

Scientific Name: Grevillea althoferorum Common Name: Split-leaved Grevillea
Family: Proteaceae Flowering Period: August - October
Dept Regions: Midwest, Swan Dept Districts: Moora, Perth Hills
Shires: Coorow, Swan Recovery Teams: Moora District Threatened Flora Recovery Team (MDTFRT) and Swan Region Threatened Flora and Communities Recovery Team (SRTFCRT)

Illustrations and/or further information: Brown, A., Thomson-Dans, C. and Marchant, N. (Eds) (1998). Western Australia's Threatened Flora. Department of Conservation and Land Management, Western Australia; Olde, P.M. and Marriott, N.R. (1993). New species and taxonomic changes in Grevillea (Proteaceae: Grevilleoideae) from south-west Western Australia. Nuytsia: 9 (2) 237-304.

Current status: Grevillea althoferorum was declared as Rare Flora under the Western Australian Wildlife Conservation Act 1950 in September 1986 and ranked as Critically Endangered (CR) in November 1998. It currently meets World Conservation Union (IUCN 2000) Red List category 'CR' under criterion B2ab(iii) (IUCN 2000) as there are less than 300 individuals known from two highly fragmented populations with continued decline in the quality of the habitat. The known populations are small and susceptible to threats including weeds, grazing, disease, road, track, fence and firebreak maintenance, inappropriate fire regimes and chemical drift. The species is also listed as Endangered under the Commonwealth Environmental Protection and Biodiversity Conservation Act (EPBC Act) 1999.

An Interim Recovery Plan was developed for the species in 1999 (Hamilton-Brown and English 1999). Information collected since that plan was completed has been incorporated into this plan and this document now replaces Hamilton-Brown and English (1999).

Critical habitat: The critical habitat for Grevillea althoferorum comprises the area of occupancy of the known populations; similar habitat within 200 metres of known populations; and additional nearby occurrences of similar habitat that do not currently contain the species but may have done so and may be suitable for translocations.

Habitat critical to the survival of the species, and important populations
Given that this species is Critically Endangered it is considered that all known habitat is habitat critical. In addition all populations are considered important to the survival of the species as the two populations have been found to be genetically distinct.

Benefits to other species/ecological communities
A threatened ecological community (TEC) listed as Vulnerable in Western Australia the 'herb rich saline shrublands in clay pans' occurs adjacent to Population 2. Recovery actions implemented to improve the quality or security of the habitat of Grevillea althoferorum Population 2, such as control of dieback disease are likely to improve the status of this TEC.

International Obligations
This plan is fully consistent with the aims and recommendations of the Convention on Biological Diversity, ratified by Australia in June 1993, and will assist in implementing Australia's responsibilities under that Convention. However, as Grevillea althoferorum is not listed under any international agreement, the implementation of other international environmental responsibilities is not affected by this plan.

Role and interests of indigenous people
There are no known indigenous communities interested or involved in the management of areas affected by this plan. Therefore no role has been identified for indigenous communities in the recovery of this species.

Social and economic impacts
There are not likely to be any major social or economic implications as a consequence of the implementation of this plan.

Evaluation of the Plan's Performance
The Department of Conservation and Land Management, in conjunction with the Recovery Teams will evaluate the performance of this IRP. In addition to annual reporting on progress with listed actions and comparison against the criteria for success and failure, the plan is to be reviewed within five years of its implementation.

Habitat requirements: Grevillea althoferorum is known from two populations that occur 200 km apart. Population 1 grows on pale brown or grey loamy sand in low heath while Population 2 grows on yellow colluvial sand in low Banksia woodland.

Existing Recovery Actions: The following recovery actions have been or are currently being implemented:

  1. Relevant land managers have been made aware of the location and threatened status of the species.
  2. DRF markers have been installed at the populations.
  3. Research has been conducted into the reproductive biology of this species.
  4. Smoke water trials were conducted in 2001, but were not successful in stimulating germination.
  5. Research has been conducted into the genetic diversity of individuals of the species.
  6. A very small quantity of seed has been collected from Population 2 and stored in the Department's Threatened Flora Seed Centre.
  7. The Botanic Garden and Parks Authority (BGPA) currently have 23 plants of Grevillea althoferorum from two clones.
  8. BGPA is currently propagating plants for use in dieback susceptibility trials.
  9. An information sheet has been produced that describes and illustrates the species.
  10. Staff from the Department's Moora and Perth Hills Districts regularly monitor populations of the species.
  11. The Moora District Threatened Flora Recovery Team and the Swan Region Threatened Flora and Communities Recovery Team regularly monitor the species.

IRP Objective: The objective of this Interim Recovery Plan is to abate identified threats and maintain or enhance in situ populations to ensure the long-term preservation of the species in the wild.

Recovery criteria
Criteria for success: The number of individuals within populations and/or the number of populations have increased by ten percent or more.
Criteria for failure: The number of individuals within populations and/or the number of populations have decreased by ten percent or more.

Recovery actions
1. Coordinate recovery actions 8. Monitor populations
2. Rehabilitate habitat 9. Liaise with land managers
3. Map critical habitat 10. Conduct further surveys
4. Implement feral animal control 11. Undertake and monitor translocation
5. Maintain disease hygiene 12. Obtain biological and ecological information
6. Develop and implement a fire management strategy 13. Promote awareness
7. Collect seed, cutting and tissue culture material 14. Review the need for a full Recovery Plan