Regional ecosystem details for 10.9.1
| Regional ecosystem | 10.9.1 |
|---|---|
| Vegetation Management Act class | Least concern |
| Wetlands | Not a Wetland |
| Biodiversity status | Of concern |
| Extent in reserves | Refer to vegetation communities for new mapping. |
| Short description | Acacia argyrodendron low open woodland or dwarf open shrubland of chenopods or scald on Cretaceous sediments |
| Structure code | Low Open Woodland |
| Description | [RE not in use]²: Refer to vegetation communities for new mapping. Acacia argyrodendron dominates the very sparse low tree layer or sparse chenopod dwarf open shrubland or very open grassland. Occurs on flat to undulating terrain. Mostly clay soils with stone cover or sometimes deep texture contrast soils overlying deeply weathered fine textured Cretaceous sediments. Not a Wetland. (BVG1M: 26a). Vegetation communities in this regional ecosystem include: 10.9.1a: [RE not in use]²: This vegetation community is now mapped as 10.4.1. Acacia argyrodendron dominates the very sparse canopy and including sometimes scattered small trees with Eremophila mitchellii present. The ground layer can have variable species composition but is usually very sparse with Sporobolus actinocladus as a codominant. Dactyloctenium radulans can be a dominant graminoid. Occurs on flat plains with cracking grey clay soil with partial gravel cover and gilgai. Not a Wetland. (BVG1M: 26a). 10.9.1b: [RE not in use]²: This vegetation community is now mapped as 10.5.7ax1. Chenopods dominate the canopy or it can be a bare scald. Sclerolaena spp. With Dysphania rhadinostachya usually dominate the very sparse ground layer (0.1-0.3m tall). Brachyachne ciliaris can be a codominant graminoid. Occurs on flat terrain with grey silty clay soil. Not a Wetland. (BVG1M: 31b). 10.9.1c: [RE not in use]²: This vegetation community is now mapped as 10.5.7x6. Acacia argyrodendron dominates the very sparse tree layer. Eremophila mitchellii dominates the very sparse tall shrub layer. There can be scattered small shrubs of Sclerolaena spp. And Enchylaena tomentosa. Paspalidium caespitosum and Tripogon loliiformis can be dominants in the very sparse to sparse ground layer. Other graminoids present are Enneapogon polyphyllus, Enteropogon ramosus, Sporobolus caroli and S. scabridus. Forbs present include Solanum ellipticum, Salsola australis and Trianthema triquetra. Occurs on undulating terrain with coarse gravel to rock cover on brown clay soil. Not a Wetland. (BVG1M: 26a). 10.9.1d: [RE not in use]²: This vegetation community is now mapped as 10.5.7ax1. Sclerolaena tricuspis usually dominates the very sparse ground layer. Enneapogon polyphyllus can be a dominant graminoid. Occurs on undulating terrain with stony cover. Not a Wetland. (BVG1M: 27a). 10.9.1e: [RE not in use]²: This community is now mapped as 10.4.1. Acacia argyrodendron dominates the very sparse to sparse tree layer. Eremophila mitchellii can be present as scattered small trees. Eremophila latrobei and Senna artemisioides are occasionally occurring shrubs. Enneapogon polyphyllus and Fimbristylis dichotoma can be codominant graminoids in the very sparse ground layer. Occurs on flat terrain with brown sandy clay duplex soil. Not a Wetland. (BVG1M: 26a). 10.9.1f: [RE not in use]²: This vegetation community is now mapped as 10.4.8. The usually sparse ground layer has variable species composition and dominant graminoids include Astrebla pectinata, Dactyloctenium radulans and Iseilema vaginiflorum. Other commonly present graminoids include Brachyachne convergens and Aristida latifolia. Forbs commonly present include Trianthema triquetra and Neptunia gracilis. Occurs on flat plains with grey clay soil with partial stone cover. Not a Wetland. (BVG1M: 30b). |
| Supplementary description | Thompson and Turpin (in prep)A10d, G3x; Turner et al. (1993), G5 |
| Fire management guidelines | SEASON: Wet to mid-dry season. Avoid late dry (August -September) as intensity will be too high (August -September). INTENSITY: Low. INTERVAL: 6-10 years, but will depend on seasonal conditions and grazing pressure. INTERVAL_MIN: 6. INTERVAL_MAX: 10. STRATEGY: Fire is not generally applied directly to acacia dominated communities, but to surrounding fire-adapted communities in order to create a landscape mosaic of burnt/unburnt areas to mitigate against wildfire. Ensure fires are patchy. ISSUES: Acacias are fire sensitive and may be killed by high intensity or too frequent fire. These communities generally have sparse ground layer. Will only burn following irregular high rainfall events. |
| Comments | 10.9.1: Survey required to verify original and current extent. Restricted to southern part of bioregion. Subject to clearing for pasture development. Surface sealing/scalding widespread; grass cover largely removed/reduced over extensive areas due to stock grazing. Survey required to confirm condition. Prone to scalding. The soils are highly dispersible and susceptible to sheet and rill erosion. Bare soil tends crust readily after rain leading to reduced infiltration and increased runoff. Also, evaporation is greater from bare soil resulting in salt concentration at the surface. Potential threats to this ecosystem are mainly from tree clearing, high susceptibility to salinity, weed infestation particularly Parthenium, over grazing and soil erosion. It is recommended that grazing be restricted to very short periods after the wet-season. The native pasture under the tree canopy in this regional ecosystem tends to have reasonable nutritive value but low bulk. 10.9.1a: Restricted to east to north-east of Muttaburra. 10.9.1b: Restricted to north-east of Muttaburra. 10.9.1c: Restricted to the east to north-east of Muttaburra. 10.9.1e: Restricted to east to north-east of Muttaburra. |
1 Estimated extent is from version 13 pre-clearing and 2021 remnant regional ecosystem mapping. Figures are rounded for simplicity. For more precise estimates, including breakdowns by tenure and other themes see remnant vegetation in Queensland.
2 Superseded: Revision of the regional ecosystem classification removed this regional ecosystem code from use. It is included in the regional ecosystem description database because the RE code may appear in older versions of RE mapping and the Vegetation Management regulation.
