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PLANT Acacia menzelii Menzel’s Wattle AUS SA AMLR Endemism Life History V V V State Perennial Family LEGUMINOSAE In the Murray Mallee and Lofty Ranges regions has been collected from an area bounded by Murray Bridge, Mannum, Harrogate, Kanmantoo and the SE Freeway (Davies 1992). The largest population in that area is believed to occur along the upper slopes of Kinchena Gorge, about 10 km E of Monarto South (Whibley pers. comm. in Leigh et al. 1984). One population is located near Rockleigh, about 20 km N of Monarto South (Spooner pers. comm. in Leigh et al. 1984).3 Davies (1992) reported twelve populations in the Murray Mallee region, nine unconserved and three conserved in Heritage Agreement Areas. The nine unconserved populations contained a total of 770 plants. Five of these populations each contained twelve or fewer plants. Three small populations were confined to road reserves. The three conserved populations contained eight, one and two individuals, with no recruitment evident, possibly due to moderate to heavy exotic grass invasion. Six other populations had been previously recorded in the Monarto area, including one in 'Frahn Pascoe Scrub' and another at 'Narinyerri Hills' (Davies 1992; Monarto Development Commission 1976).3,4 Photo: M. Fagg ©ANBG Conservation Significance Endemic to SA (Davies 1992; Whibley and Symon 1992).3,4 The AMLR distribution is part of a limited extant distribution in adjacent regions of SA. Within the AMLR the species’ relative area of occupancy is classified as ‘Very Restricted’.2 Description Compact, rounded and resinous shrub of 1-2 m with minute yellow globular flower-heads (Cunningham et al. 1992; Jessop and Toelken 1986; Leigh et al. 1984; Orchard and Wilson 2001a).3,4 Distribution and Population Confined to localised areas of the Murray Mallee (around Monarto and Murray Bridge), southern MLR and Flinders Ranges (around Brachina Gorge and Mount Hack) (Davies 1992; Davies 1995; Jessop and Toelken 1986; Leigh et al. 1984; Orchard and Wilson 2001a). Best known in the area surrounding Monarto South in the eastern foothills of the MLR. (Davies 1995a).3,4 The extent of occurrence is approximately 364.2 km2.4 Pre-1983 AMLR filtered records are confined to the eastern MLR; from Harrogate, Rockleigh, Kanmantoo and Monarto areas.2 Habitat Grows in areas of average annual rainfall 350-400 mm (Whibley and Symon 1992). Occurs as scattered shrubs; either on roadsides, or in remnant or partly cleared low open shrubby woodland on more rocky sites (J.D. Briggs pers. comm. in Leigh et al. 1984).3 In the Murray Mallee and Lofty Ranges regions grows on the gentle slopes of undulating plains and low rolling hills. Frequently occurs amongst rock outcrops such as granite, on all aspects. Soils are various sands and loams. In the Monarto area occurs in various vegetation associations: (1) Eucalyptus socialis low open woodland and very low woodland, (2) E. dumosa tall sparse shrubland, (3) E. porosa low woodland, very low woodland and open woodland, (4) E. odorata low woodland and low open woodland, (5) Callitris gracilis open woodland and low open woodland and (6) E. odorata associations with other Eucalypts (Davies 1992).3 Further information: Biodiversity Conservation Unit, Adelaide Region Phone: (61 8) 8336 0901 Fax: (61 8) 8336 0999 http://www.environment.sa.gov.au/ Department for Environment and Heritage FIS 90346 May 2008 Prepared as part of the Regional Recovery Plan for Threatened Species and Ecological Communities of Adelaide and the Mount Lofty Ranges, South Australia 2009 - 2014 Within the AMLR preferred broad vegetation groups are Mallee and Grassy Woodland.2 Within the AMLR the species’ degree of habitat specialisation is classified as ‘Moderate-Low’.2 Biology and Ecology Flowers between July and October, but can produce flowers as late as January (Davies 1992; Jessop and Toelken 1986).3,4 No information available relating to the effect of fire and disturbance on life history processes.4 Aboriginal Significance Post-1983 records indicate the majority of AMLR distribution occurs in northern Ngarrindjeri Nation, adjoining southern Nganguraku and Peramangk Nations.2 Threats General threats include grazing, clearance, lack of recruitment, inappropriate fire regimes, weed invasion (roadside), road and rail maintenance activities.1 Threats have previously been assessed as: fragmentation (high), weeds (high), grazing (high), road/rail maintenance (high), and vegetation clearance (low) (Davies 1992).4 References Note: In some cases original reference sources are not included in this list, however they can be obtained from the reference from which the information has been sourced (the reference cited in superscript). 1 Department for Environment and Heritage. (2007). Adelaide and Mount Lofty Ranges Regional Recovery Pilot Expert Flora Workshop, Unpublished Notes. Participants: Bickerton, D., Croft, T., Jury, T., Lang, P., Prescott, A., Quarmby, J. and Smith, K., Adelaide. 2 Department for Environment and Heritage (2007). Adelaide and Mount Lofty Ranges Regional Recovery Pilot Project Database. Unpublished data extracted and edited from BDBSA, SA Herbarium (July 2007) and other sources. 3 Department of the Environment and Water Resources (2007). Acacia menzelii in Species Profile and Threats Database. Department of the Environment and Water Resources, Canberra. 4 Obst, C. (2005). South Australian Murray Darling Basin Threatened Flora Recovery Plan. Report to the Threatened Species and Communities Section, Australian Government Department of the Environment and Heritage, Canberra. Additional current direct threats have been identified and rated for this species. Refer to the main plan accompanying these profiles. Regional Distribution Map based on filtered post-1983 records.2 Note, this map does not necessarily represent the actual species’ distribution within the AMLR. Further information: Biodiversity Conservation Unit, Adelaide Region Phone: (61 8) 8336 0901 Fax: (61 8) 8336 0999 http://www.environment.sa.gov.au/ Department for Environment and Heritage FIS 90346 May 2008 Prepared as part of the Regional Recovery Plan for Threatened Species and Ecological Communities of Adelaide and the Mount Lofty Ranges, South Australia 2009 - 2014