FOREWORD Recovery Plans (RPs) and Interim Recovery Plans (IRPs) are developed within the framework laid down in Department of Conservation and Land Management (CALM) Policy Statements Nos. 44 and 50. Note: the Department of CALM formally became the Department of Environment and Conservation (DEC) in July 2006. DEC will continue to adhere to these Policy Statements until they are revised and reissued.
Plans outline the recovery actions that are required to urgently address those threatening processes most affecting the ongoing survival of threatened taxa or ecological communities, and begin the recovery process.
DEC is committed to ensuring that Threatened taxa are conserved through the preparation and implementation of plans and by ensuring that conservation action commences as soon as possible and, in the case of Critically Endangered (CR) taxa, always within one year of endorsement of that rank by the Minister.
This plan will operate until withdrawn or replaced. It is intended that, if the species is still ranked as CR in Western Australia at the end of the five-year term, this plan will be reviewed and the need for further recovery actions assessed.
This plan was given regional approval on 19 August 2008 and approved by the Director of Nature Conservation on 12 September 2008. The provision of funds identified in this plan is dependent on budgetary and other constraints affecting DEC, as well as the need to address other priorities.
This plan was written and endorsed as an IRP in Western Australia, and it is also the National Recovery Plan for this Ecological Community as listed under the Commonwealth Environment Protection and Biodiversity Conservation Act 1999.
Information in this plan was accurate as at March 2010.
IRP PREPARATION This plan was prepared by Renee Hartley1 and Sarah Barrett2 1 Technical Officer, DEC Albany District, 120 Albany Hwy, Albany 6330.
Leonie Monks Research Scientist, DEC, Science Division
Andrew Brown Coordinator, DEC Threatened Species and Communities Unit
Margaret Pieroni Artist and Leader, Australian Society for Growing Australian Plants (ASGAP) Dryandra Study Group, Denmark, WA
Thanks also to the staff of the W.A. Herbarium for providing access to Herbarium databases and specimen information, and DEC's Species and Communities Branch for assistance.
Cover photograph by J.A. Cochrane.
CITATION This IRP should be cited as:
Department of Environment and Conservation (2008). Banksia ionthocarpa subsp. ionthocarpa, Interim Recovery Plan 2008-2013. Interim Recovery Plan No. 208. Department of Environment and Conservation, Western Australia.
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; Monks, L. (2000) Conservation biology of the rare and threatened Banksia ionthocarpa, B. mimica and B. serra. Curtin University of Technology, Western Australia; Western Australian Herbarium (1998) FloraBase - Information on the Western Australian Flora, Department of Conservation and Land Management, Western Australia. http://www.DEC.wa.gov.au/science/ Current status: Banksia ionthocarpa subsp. ionthocarpa was declared as Rare Flora in July 1989 under the Western Australian Wildlife Conservation Act 1950 (as Dryandra ionthocarpa). The subspecies is ranked as Endangered against World Conservation Union Red List Criteria B1ab(v) and B2ab(v) (IUCN 2001) due to a decline in the number of mature individuals, a single known population and the limited area of occupancy and extent of occurrence. The species, Banskia ionthocarpa is listed as Endangered under the Commonwealth Environment and Biodiversity ProtectionAct 1999 and both subspecies are covered by this listing.
One natural population consisting of two subpopulations totalling 945 plants over less than five hectares is currently known. A translocated population supports another 612 individuals. In 1999 a new population of this species was located near Narrogin some hundreds of kilometres north of previously known populations and in 2004 the species was divided into two subspecies - Banksia. ionthocarpa subsp. ionthocarpa (Kamballup) and B. ionthocarpa subsp. chrysophoenix (Narrogin). Plants in the Narrogin population resprout from a lignotuber, in contrast to the Kamballup plants that are non-lignotuberous.
Description: Banksia ionthocarpa subsp. ionthocarpa is a caespitose, tufted prostrate shrub with a very short stem and leaves up to 30 cm long. The leaf lobes are broadly triangular, up to 8 mm and cut within 1.5 mm of the midrib. It is a nonsprouter with pale yellow flowers borne close to the ground within the leaves. The subspecies has characteristic follicles, which are not woody, contain one seed, are about 5 mm in size and covered in 7 to 8 mm long erect hairs. It is unusual in having floral bracts that do not elongate as the fruit develop. The robust pistils are prominently bowed before anthesis, then recurved very strongly afterwards.
Banksia ionthocarpa subsp. ionthocarpa (Kamballup) is distinguished from B. ionthocarpa subsp. chrysophoenix (Narrogin) in lacking a lignotuber.
Habitat requirements: Banksia ionthocarpa subsp. ionthocarpa is known from 945 mature plants in a single natural population, comprising two subpopulations, in the Kamballup area. Subpopulation 1A is on a Class C recreation reserve vested in the Shire of Plantagenet and Subpopulation 1B in an adjacent unvested Class C reserve for the purpose of public utility. The species occurs on gravely clay-loam over spongolite in open shrub mallee habitat dominated by scattered Eucalyptus falcata and E. pleurocarpa over scrub and dwarf scrub of Melaleuca spp., Allocasuarina thuyoides, Beaufortia micrantha, Isopogon buxifolius, Verticordia spp. and Xanthorrhoea platyphylla.
Habitat critical to the survival of the species and important populations: The habitat critical to the survival of Banksia ionthocarpa subsp. ionthocarpa comprises the area of occupancy of known population; similar habitat within 200 metres of known population; remnant vegetation that links populations; and additional nearby occurrences of similar habitat that do not currently contain the species but may have done so in the past and may be suitable for translocations.