Regional ecosystem details for 6.3.21
| Regional ecosystem | 6.3.21 |
|---|---|
| Vegetation Management Act class | Least concern |
| Wetlands | Not a Wetland |
| Biodiversity status | No concern at present |
| Subregion | 5, (8), (3) |
| Estimated extent1 | Pre-clearing 227000 ha; Remnant 2021 208000 ha |
| Short description | Acacia aneura, A. excelsa and/or Geijera parviflora low woodland on low alluvial sand dunes |
| Structure code | Low Woodland |
| Description | Acacia aneura usually predominates and together with A. excelsa or Geijera parviflora and other tree species forms a distinct but discontinuous canopy (8-9m high). In some areas, with slightly yellower soils, Geijera parviflora dominates the canopy. Other tree species frequently present include Acacia excelsa, Atalaya hemiglauca, Grevillea striata, Eucalyptus populnea and Ventilago viminalis. Scattered shrubs are frequently present, but often only form a distinct layer (2-6m) after disturbance. Frequent shrub species include Alectryon oleifolius, Eremophila deserti, Hakea leucoptera, Capparis loranthifolia, Eremophila sturtii and Dodonaea viscosa subsp. Angustissima. The ground layer is grass dominated and is sparse to open depending on tree density. Thyridolepis mitchelliana predominates at higher densities, with Aristida calycina var. praealta predominating in the more open areas. Other grass species include the perennials Eragrostis eriopoda, E. lacunaria and Panicum effusum and the annuals Perotis rara, Aristida holathera var. holathera and Enneapogon avenaceus. Forbs are seasonally abundant including Abutilon otocarpum, Calotis cuneata, Chrysocephalum apiculatum, Hibiscus sturtii, Portulaca spp., Sclerolaena spp. And Ptilotus polystachyus. Occurs on flat to gently undulating plains and lower slopes of sand hills on alluvial plains. Soils are very deep, acid, red to sometimes yellowish red earthy to loamy sands and texture contrast soils. Not a Wetland. (BVG1M: 23a). Vegetation communities in this regional ecosystem include: 6.3.21x50: Mixed low woodland, including combinations of the species Acacia excelsa, Ventilago viminalis, Geijera parviflora, Archidendropsis basaltica, Atalaya hemiglauca and Grevillea striata. Other canopy species include Eucalyptus populnea, Acacia aneura and Callitris glaucophylla. A shrub layer commonly occurs, including Alectryon oleifolius, Eremophila deserti, Hakea leucoptera, Capparis loranthifolia, Eremophila sturtii and Dodonaea viscosa subsp. angustissima. The ground layer is tussock grasses, including Thyridolepis mitchelliana, Aristida calycina var. praealta, Eragrostis eriopoda, E. lacunaria, Perotis rara and Aristida holathera var. holathera. Forbs may be seasonally abundant. Occurs on the lower slopes of sand hills on alluvial plains. Soils are very deep, red earthy to loamy sands. Not a Wetland. (BVG1M: 23a). |
| Supplementary description | Neldner (1984), 38a; Mills and Lee (1990), D1 (LU 60 and 62) |
| Protected areas | Binya NP, Culgoa Floodplain NP |
| Fire management guidelines | SEASON: Various (wet season or winter). INTENSITY: Low to moderate. INTERVAL: Fire return interval not relevant. INTERVAL_MIN: 100. INTERVAL_MAX: 100. STRATEGY: Aim to exclude fire by fuel reduction in adjacent vegetation communities where possible. Undertake partial burns when necessary to reduce fuel loads and protect against severe wildfire. Burn with high soil moisture (i.e., after rain/storms) or in winter. Interval will depend on need for burning, seasonal conditions and grazing pressure. Not to be targeted for burning unless in need of protection. ISSUES: Acacia aneura may be killed by high intensity fire. There is rarely enough fuel load to burn in these ecosystems. |
| Comments | 6.3.21: This regional ecosystem has been moved to 6.3.21x50. Warrego River. 6.3.21x50: Warrego River. |
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.
