Regional ecosystem details for 10.4.2
| Regional ecosystem | 10.4.2 |
|---|---|
| Vegetation Management Act class | Of concern |
| Wetlands | Not a Wetland |
| Biodiversity status | Of concern |
| Subregion | 2, 4, 3, (11.7) |
| Estimated extent1 | Pre-clearing 20000 ha; Remnant 2021 6000 ha |
| Short description | Acacia harpophylla low woodland on Cainozoic lake beds (subregion 3) |
| Structure code | Low Woodland |
| Description | Acacia harpophylla woodland to open forest. Other trees commonly occur and may include Lysiphyllum carronii, Eucalyptus brownii, Flindersia dissosperma, Terminalia oblongata and Geijera salicifolia. Tussock grass ground layer of Bothriochloa ewartiana, Aristida latifolia, Aristida jerichoensis and Paspalidium caespitosum. Occurs on cracking clay soils, on plains and undulating downs, on Cainozoic lake deposits. Areas of texture contrast soils. Not a Wetland. (BVG1M: 25a). |
| Supplementary description | Gunn et al. (1967), Du, Hu; Thompson and Turpin (in prep), A11c |
| 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. Brigalow scrubs tend to act as fire breaks owing to sparse ground vegetation. ISSUES: Brigalow is soft-seeded, so germination is not promoted by fire. Brigalow is only tolerant of low intensity 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 | 10.4.2: Restricted to subregion 3 at Natal Downs and Victoria Downs. Subject to clearing for pasture development. Relatively poor pastures which are moderately degraded. This ecosystem is subject to clearing for pasture development. Occurrences on texture contrast soils are subject to scalding. There is potential for Parthenium invasion on the heavy clay soils. |
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.
