Regional ecosystem details for 10.9.2
| Regional ecosystem | 10.9.2 |
|---|---|
| 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 cambagei and/or Eucalyptus thozetiana low woodland to open woodland on calcareous sandstones |
| Structure code | Low Woodland |
| Description | [RE not in use]²: Refer to vegetation communities for new mapping. Acacia cambagei dominates the sparse low tree layer. Also Eucalyptus thozetiana with or without understorey of Acacia cambagei open woodland and open tussock grasslands on flat to undulating terrain with reddish brown soil. Occurs on gentle slopes with brown clay soils with or without stone cover formed on calcareous sandstones. Not a Wetland. (BVG1M: 26a). Vegetation communities in this regional ecosystem include: 10.9.2a: [RE not in use]²: This vegetation community is now partly mapped as 10.5.7x2 and partly mapped as 10.7.3x2b. Acacia cambagei dominates the very sparse low tree layer. Sometimes there is a very sparse sub-canopy dominated by A. cambagei. Carissa lanceolata usually dominates the very sparse shrub layer. Eremophila mitchellii and Eremophila deserti are present. Enteropogon ramosus, Bothriochloa ewartiana and Eriochloa crebra are often present and sometimes dominant in the very sparse to sparse ground layer. Occurs with mostly reddish brown clay soil on flat to undulating terrain. Not a Wetland. (BVG1M: 26a). 10.9.2ax1: [RE not in use]²: This regional ecosystem is now mapped as 10.4.5. Acacia microcybe dominates the very sparse low tree layer. Other trees present include Flindersia maculosa and Eremophila mitchellii. Enneapogon polyphyllus and Sclerolaena anisacanthoides dominate the ground layer. Occurs on clay on gently undulating plains on Cretaceous sediments. Not a Wetland. (BVG1M: 26a). 10.9.2b: [RE not in use]²: This vegetation community is now partly mapped as 10.7.5 and partly mapped as 10.7.3x2b. Eucalyptus thozetiana dominates the sparse tree layer with Acacia cambagei in the understorey. Eucalyptus thozetiana dominates the usually very sparse canopy. Acacia cambagei dominates the sparse sub-canopy and E. thozetiana is usually present. Carissa lanceolata and Eremophila deserti dominate the very sparse shrub layer. Paspalidium constrictum and/or P. caespitosum dominate the weakly developed very sparse ground layer. Occurs on flat to gently undulating terrain with reddish brown clayey soil. Not a Wetland. (BVG1M: 26a). 10.9.2c: [RE not in use]²: This vegetation community is now partly mapped as 10.7.5 and partly mapped as 10.7.3x2b. Eucalyptus thozetiana dominates the very sparse canopy and the very sparse small tree layer. A scattered very sparse shrub layer is usually present with Carissa lanceolata commonly occurring and sometimes Eremophila deserti or Eremophila mitchellii dominant. Sporobolus actinocladus or S. scabridus usually dominate the very sparse ground layer. Usually found on flat to gently undulating terrain with reddish brown clay soil adjacent to pediments where map unit 10.7.5 occurs. Not a Wetland. (BVG1M: 12a). 10.9.2d: [RE not in use]²: This vegetation community is now mapped as 10.5.7ax1. Bothriochloa ewartiana or Brachyachne convergens dominate the usually sparse ground layer and Sporobolus disjunctus or Enneapogon polyphyllus are sometimes a codominant. Occurs on grey clays on flat to gently undulating terrain. Not a Wetland. (BVG1M: 31b). 10.9.2dx1: [RE not in use]²: This regional ecosystem is now mapped as 10.4.8. Astrebla pectinata, Astrebla squarrosa and Iseilema vaginiflorum usually dominate the very sparse ground layer. Occurs on flat to undulating clay plain. Not a Wetland. (BVG1M: 31b). 10.9.2dx2: [RE not in use]²: This regional ecosystem is now partly mapped as 10.5.7ax1 and partly mapped as 10.3.8. Dactyloctenium radulans dominates the very sparse ground layer. Occurs on undulating terrain with shallow clayey soil. Not a Wetland. (BVG1M: 31b). 10.9.2e: [RE not in use]²: This vegetation community is now partly mapped as 10.3.16a and partly mapped as 10.5.7ax1. Triodia longiceps dominates the sparse ground layer. Sporobolus actinocladus and S. australasicus are graminoids usually present. Occurs on gently sloping terrain with reddish brown sandy soil. Not a Wetland. (BVG1M: 33b). 10.9.2f: [RE not in use]²: This vegetation community is now mapped as 10.5.7ax1. Ephemeral grasses or herbs dominate the sparse ground layer. Variable species composition. RE is defunct. Not a Wetland. (BVG1M: 31b). |
| Supplementary description | Gunn et al. (1967), U; Lorimer (1998), Mc2; Thompson and Turpin (in prep), A10dd, A13dd, E65dd |
| 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: These communities generally have sparse ground layer. Will only burn following irregular high rainfall events. 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. |
| Comments | 10.9.2: Subject to clearing and dry land salinity. Moderately degraded; stock attracted to salty areas and grazing pressure increases to the detriment of the country. 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. 10.9.2a: Uncommon vegetation community. 10.9.2b: At one site Acacia harpophylla was present in the subcanopy replacing A. cambagei possibly reflecting the association with some other ecosystems such 10.9.3a. Uncommon and restricted vegetation community associated with 10.9.2a. 10.9.2c: Uncommon and restricted vegetation community associated with 10.9.2a. 10.9.2d: 10.9.2f is now mapped as part of this community. Uncommon and restricted vegetation community associated with 10.9.2a. 10.9.2e: Very rare and restricted vegetation community associated with map unit 10.9.2c. |
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.
