Western Australia lists ecological communities as threatened under legislation following endorsement by the Western Australian Minister for the Environment. Ecological communities in which insufficient information has been analysed for listing as a threatened ecological community, or which are rare but not currently threatened, are placed on a list of priority ecological communities, as determined by the WA Threatened Ecological Communities Scientific Committee (WATECSC).
The WA Wheatbelt Woodlands ecological community, as nominated for this assessment, is regarded as a Priority 3(iii) ecological community. None of the component vegetation associations that comprise the WA Wheatbelt Woodland ecological community are listed as threatened in their own right. However, some occurrences may be captured where a landscape system of plant assemblages (usually limited to a given locality) has been listed. These would need to be verified by on-site observation to determine that the ecological community is present. Communities that are recognised as threatened or priority communities in Western Australia, and that potentially overlap with the WA Wheatbelt woodland ecological community, are identified in Table B2.
Table B2. Ecological communities recognised in WA as threatened or priority ecological communities (as at 15 September 2014) that potentially correspond entirely or in part to the WA Wheatbelt woodland ecological community.
This system occurs between Morawa and Three Springs in the far north of the Avon Wheatbelt bioregion. It comprises several vegetation associations, generally of non-eucalypt vegetation. The system has one element that potentially corresponds to the the WA Wheatbelt Woodlands: Eucalyptus loxophleba woodland with mixed understorey over brown sandy clay loam on lower slopes, valleys and creeklines.
Plant assemblages of the Inering System
[Listed as Vulnerable]
This system occurs to the south and east of Three Springs in the far north of the Avon Wheatbelt bioregion. It comprises several vegetation associations, generally of non-eucalypt vegetation. The system has two elements that potentially correspond to the the WA Wheatbelt Woodlands: Melaleuca cardiophylla thicket with scattered Eucalyptus loxophleba and Eucalyptus salmonophloia over granite on the lower slopes and foothills; and Eucalyptus loxophleba woodland over clay loam on the foothills. The tree cover over the Melaleuca thicket component may be too sparse to be included in the WA Wheatbelt Woodland ecological community and would require verification through on-ground survey that the eucalypts form a dominant canopy.
Plant Assemblages of the Koolanooka System
[Listed as Vulnerable]
This system occurs east of Morawa in the far north of the Avon Wheatbelt bioregion. It comprises several vegetation associations, generally of non-eucalypt or mallee vegetation. The system has two elements that potentially correspond to the the WA Wheatbelt Woodlands: Eucalyptus loxophleba woodland over scrub on footslopes; and Eucalyptus salubris woodland over scrub in gullies.
Ecological community name [Status in WA]
Description and relationship to the WA Wheatbelt Woodland ecological community
Brown mallet (Eucalyptus astringens) communities in the western Wheatbelt on alluvial flats
Near York and on the Arthur River on grey clays the understorey is dominated by Melaleuca viminea over sedges (Gahnia trifida) and bunch grasses. At Kojunup and near Tambellup on brown clays sparse shrubs and succulent shrubs (Disphyma crassifolium) dominate the understorey. This community corresponds with elements of the WA Wheatbelt Woodlands that are dominated by E. astringens.
Red Morrel woodland of the Wheatbelt
Tall open woodlands of Eucalyptus longicornis (red morrell) found in the Wheatbelt on lateritic, ironstone or granitic soil types. Sometimes found with Eucalyptus salmonophloia (Salmon Gum), or E. loxophleba (York Gum) woodlands and has very little understorey. It is also found directly above lake systems in the central and eastern Wheatbelt. The landscape unit in which it is found is valley floors, usually adjacent to saline areas. This community corresponds with elements of the WA Wheatbelt Woodlands that are dominated by E. longicornis.
The Jingalup system occurs across the Katanning (AVW02) and Southern Jarrah Forest (JAF02) IBRA subregions. It corresponds with elements of the WA Wheatbelt Woodlands that are dominated by E. occidentalis in that region.
Eucalypt woodlands of the Western Australian wheatbelt
This refers to the WA Wheatbelt Woodlands as nominated for EPBC Act assessment. As such, it relates to eucalypt-dominated woodlands in the Avon Wheatbelt IBRA bioregion and Western Mallee IBRA subregions. Woodlands dominated by jarrah (E. marginata), marri (Corymbia calophylla) and species with a mallee growth form are excluded. The ecological community most commonly includes salmon gum (Eucalyptus salmonophloia), York gum (Eucalyptus loxophleba), red morrel (Eucalyptus longicornis) or gimlet (Eucalyptus salubris) and several species of mallet.
This complex occurs on the eastern edge of the wheatbelt into the Coolgardie bioregion. It comprises a number of non-eucalypt and mallee vegetation types. There are some elements that potentially correspond to the the WA Wheatbelt Woodlands: E. longicornis with E. corrugata and E. salubris or E. myriadena woodland on broad flats; E. salmonophloia and E. salubris woodland on broad flats; and E. capillosa subsp. polyclada and/or E. loxophleba over Hakea pendens thicket on skeletal soils on ridges (laterites, breakaways and massive gossanous caps).
Plant assemblages of the Wongan Hills System
This system occurs in the north-central wheatbelt and generally comprises of non-eucalypt and mallee vegetation associations. Some elements present on the lower slopes potentially correspond to the the WA Wheatbelt Woodlands, such as Eucalyptus longicornis/ E. salubris woodland; and E. salmonophloia and E. loxophleba woodlands.