Regional ecosystem details for 10.3.3
| Regional ecosystem | 10.3.3 |
|---|---|
| Vegetation Management Act class | Of concern |
| Wetlands | Contains Palustrine |
| Biodiversity status | Of concern |
| Subregion | 2 |
| Estimated extent1 | Pre-clearing 10 ha; Remnant 2021 10 ha |
| Short description | Acacia harpophylla woodland on alluvial plains |
| Structure code | Woodland |
| Description | Acacia harpophylla woodland to open forest over a tussock grass ground layer. Occurs on alluvial plains. Contains Palustrine. (BVG1M: 25a). Vegetation communities in this regional ecosystem include: 10.3.3a: [RE not in use]²: This vegetation community is now mapped as 10.3.5. Eucalyptus cambageana dominates the very sparse canopy. Acacia harpophylla is occasionally present as scattered small trees with E. cambageana, Flindersia dissosperma, Lysiphyllum carronii and Eremophila mitchellii. Carissa lanceolata usually dominates the very sparse shrub layer. Eremophila mitchellii, Psydrax oleifolia and Atalaya hemiglauca are usually present in the shrub layer. Dominant graminoids in the ground layer are variable and include Enteropogon acicularis, Bothriochloa ewartiana, Paspalidium caespitosum, Sporobolus actinocladus, Oxychloris scariosa, Chrysopogon fallax, *Cenchrus ciliaris and Fimbristylis dichotoma. Occurs on alluvial plains. Not a Wetland. (BVG1M: 25a). 10.3.3b: [RE not in use]²: This vegetation community is now mapped as 10.3.3. Acacia harpophylla woodland to open forest. Occurs on heavy clay soils on alluvial plains. Contains Palustrine. (BVG1M: 25a). |
| Supplementary description | Thompson and Turpin (in prep), A11, E65; Turner et al. (1978), W2 |
| Special values | 10.3.3: Potential habitat for NCA listed species: Ammannia robertsii. |
| 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 | 10.3.3: Associated with gilgais that may support ephemeral wetlands. Widespread across eastern parts of the DEU. This regional ecosystem is subject to clearing for pasture development. Occurrences on texture contrast soils are subject to scalding. 10.3.3a: *Ocimum basilicum frequently present. 10.3.3b: Subject to clearing. Degraded pastures due to grazing over >70% of extent. |
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.
