Regional ecosystem details for 6.3.25
| Regional ecosystem | 6.3.25 |
|---|---|
| Vegetation Management Act class | Least concern |
| Wetlands | Not a Wetland |
| Biodiversity status | No concern at present |
| Subregion | 5, (3), (1) |
| Estimated extent1 | Pre-clearing 106000 ha; Remnant 2021 82000 ha |
| Short description | Acacia harpophylla and/or A. cambagei low woodland to woodland on alluvial plains |
| Structure code | Low Woodland |
| Description | Acacia harpophylla and/or A. cambagei low woodland. Eucalyptus spp., including E. largiflorens and E. coolabah may occur as emergents. Scattered Eremophila mitchellii tall shrubs are frequent while the low shrubs Enchylaena tomentosa and Maireana triptera maybe locally abundant. The ground layer is dominated by tussock grasses, including Paspalidium constrictum, Eragrostis setifolia, Enteropogon acicularis, Chloris pectinata, Sporobolus actinocladus and S. caroli. Forbs include Sclerolaena lanicuspis, S. birchii, S. diacantha, Chenopodium desertorum and Sida everistiana, Einadia spp., Abutilon spp. Occurs on flat to gently undulating plains formed on alluvium. Soils are generally very deep reddish brown to alluvial texture contrast. Includes extensive areas occurring on superficial Quaternary deposits overlying younger alluvium (land zone 3) sometimes merging into areas on Cainozoic sediments (land zone 4). Not a Wetland. (BVG1M: 25a). Vegetation communities in this regional ecosystem include: 6.3.25a: Acacia harpophylla low woodland (4-10m high) +/- emergent Eucalyptus populnea woodland to open woodland (4-10m high). Scattered Eremophila mitchellii tall shrubs are frequent while the low shrubs Enchylaena tomentosa and Maireana triptera maybe locally abundant. The ground layer is sparse to seasonally open and dominated by perennial grasses but contains a large number of short grass and forb species. Occurs on alluvium. Not a Wetland. (BVG1M: 25a). |
| Supplementary description | Neldner (1984), 42a, 42b; Mills and Lee (1990), G2 (LU36) |
| Protected areas | Culgoa Floodplain NP |
| Fire management guidelines | INTERVAL: Fire return interval not relevant. INTERVAL_MIN: 100. INTERVAL_MAX: 100. STRATEGY: Do not target for fires. Control fuel loads in the surrounding vegetation. Can tolerate only very early dry season fires, under mild conditions, that trickle along the ground layer. ISSUES: Brigalow is soft-seeded, so germination is not promoted by fire. Brigalow is only tolerant of mild fires trickling underneath, and can be damaged or killed by moderate to high intensity fires. Exotic grasses, such as Buffel grass, carry intense fires into these communities and can cause tree deaths. Control of fuel loads in the surrounding vegetation is important. |
| Comments | 6.3.25: Some areas are subject to scalding (Mills and Lee, 1990, LU36). Areas in southeast of the bioregion subject to clearing. The density and composition of the shrub and ground layers varies with the location and the seasonal conditions. 6.3.25a: Occurs in the northern half of the bioregion, in association with poplar box open woodland. |
1 Estimated extent is from version 13.1 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.
