Acacia loderi 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Fabales Fabaceae

Scientific Name: Acacia loderi Maiden
Common Name(s):
English Nealie, Broken Hill Gidgee, Myall, Nelia
Taxonomic Notes: Similar in habit to A. papyrocarpa but has narrower thicker leaves and narrower beaded pods.

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2012
Date Assessed: 2011-07-27
Assessor(s): Malcolm, P.
Reviewer(s): Hilton-Taylor, C.
Acacia loderi is a tall shrub or tree endemic to Australia distributed mainly in New South Wales. With current data available only Criterion B could be applied for this assessment. The historical known range based on available herbarium specimens is large, but continuing degradation of the habitat, which is already highly fragmented, by overgrazing and fire regimes has lead to lack of regeneration and localized extinctions. It is therefore rated as Near Threatened (almost qualifies under B1ab(iii)).

With further information on population decline and quantitative analysis indicating probability of extinction use of Criteria A and E may warrant listing in a threatened category. According to the NSW Scientific Committee, in view of the fragmented nature of many stands, the widespread lack of regeneration of Acacia loderi, the continued threat of heavy grazing pressure, and further clearing, Acacia loderi shrublands are likely to become extinct in nature unless conservation measures are put in place (NSW Scientific Committee 2000).

Geographic Range [top]

Range Description:Acacia loderi is endemic to Australia distributed mainly in New South Wales and in the borders with South Australia and Victoria. It occurs in western New South Wales west of Hillston and north to White Cliffs, extending into South Australia to Oakbank Station and Netley Gap; also in northwestern Victoria near Merbein and Nathalia (Orchard and Wilson 2001).
Countries occurrence:
Australia (New South Wales, South Australia, Victoria)
Additional data:
Lower elevation limit (metres):30
Upper elevation limit (metres):430
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The major stands of A. loderi occur between Broken Hill, Ivanhoe and Wilcannia, while isolated stands occur beyond these areas. There is no information on total number of individuals, however, there is a reported decline in the number of mature individuals and over much of the distribution there is relatively little regeneration of A. loderi. Some of the populations now consist of only rings of old trees (Pickard and Norris 1994, NSW Scientific Committee 2000).
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:Yes

Habitat and Ecology [top]

Habitat and Ecology:A dense multi-trunked shrub to 3-5 m tall maturing into a tree 10 m tall. It grows in solonised brown and red soils, in low woodland and tall shrubland, sometimes associated with chenopods, Casuarina cristata or Acacia aneura. Large old individuals are particularly susceptible to killing by fire. Litter of bark, twigs, branches and wind blown plant material accumulate at the base of the plants burns during fires, killing the plants even though the canopy is barely scorched (Pickard and Norris 1994).

Threats [top]

Major Threat(s): The Acacia loderi shrubland community (Nelia Shrublands) is listed as an Endangered Ecological Community in New South Wales. The main threats to this community include clearing of remnants of vegetation and lack of regeneration of Nelia due to heavy grazing pressure from stock and rabbits. Also inappropriate fire regimes and invasion of exotic weeds are affecting the habitat and directly impacting on the species. Even in conservation reserves, such as Kinchega National Park, grazing by rabbit has severely limited regeneration and flooding of the Menindee Lakes has resulted in the destruction of several populations (NSW Scientific Committee 2000, 2005).

Conservation Actions [top]

Conservation Actions: Most remnant stands of the community are located on pastoral leases although small patches occur in conservation reserves including Mungo and Kinchega National Parks. The Acacia loderi shrubland community (Nelia Shrublands) is listed as an Endangered Ecological Community in New South Wales (NSW Scientific Committee 2000, 2005); it is considered to be Rare in South Australia (Government of South Australia 2007); it is listed as Vulnerable in Victoria (Department of Sustainability and Environment 2005), however, it is not listed as threatened under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act). The seeds for this species have been collected as part of the Millennium Seed Bank project. Seeds are located at: Mount Annan Botanic Garden, New South Wales (Australia) and Wakehurst Place, Royal Botanic Gardens, Kew (UK). Recommended conservation measures include: control of grazing, adequate fire management, weed control, monitoring of habitat and further surveys to determine extant distribution old remanants.

Citation: Malcolm, P. 2012. Acacia loderi. The IUCN Red List of Threatened Species 2012: e.T19893008A20124123. . Downloaded on 23 June 2018.
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