Regional ecosystem details for 11.9.12
| Regional ecosystem | 11.9.12 |
|---|---|
| Vegetation Management Act class | Endangered |
| Wetlands | Not a Wetland |
| Biodiversity status | Endangered |
| Subregion | 2, 27, 21, (6), (20), (15), (23), (10), (22) |
| Estimated extent1 | Pre-clearing 24000 ha; Remnant 2021 4000 ha |
| Short description | Dichanthium sericeum grassland with clumps of Acacia harpophylla on fine-grained sedimentary rocks |
| Structure code | Tussock Grassland |
| Description | Dichanthium sericeum tussock grassland in mosaic with clumps of Acacia harpophylla, Lysiphyllum hookeri and L. carronii. However, a wide range of other grass and forb species are usually present and may dominant depending on seasonal conditions and management regime. Frequently occurring species include the grasses Aristida leptopoda, A. latifolia, Astrebla lappacea, Bothriochloa erianthoides, Digitaria brownii, D. divaricatissima, Eriochloa crebra, Panicum decompositum, P. queenslandicum, Paspalidium globoideum and the forbs Abelmoschus ficulneus, Boerhavia dominii, Corchorus trilocularis, Cyperus bifax, Glycine latifolia, Ipomoea lonchophylla, Phyllanthus maderaspatensis, Tribulus micrococcus and Rhynchosia minima. Occurs on undulating plains and rises, on Cainozoic to Proterozoic consolidated, fine-grained sediments. It is frequently associated with shale. Associated soils are shallow to deep cracking clays that may be self-mulching, with linear gilgai present in places. Not a Wetland. (BVG1M: 30b). |
| Supplementary description | Gunn et al. (1967), Portwine (3); Story et al. (1967), Arcadia (4); Speck et al. (1968), Kiddell (6); Gunn and Nix (1977), LU 74, 102; Neldner (1984), 28 (127) |
| Fire management guidelines | SEASON: Late wet to early dry season when there is good soil moisture. Early storm season or after good spring rains. INTENSITY: Various. Mainly low, but also moderate. INTERVAL: >3years. INTERVAL_MIN: 3. INTERVAL_MAX: 50. STRATEGY: Low to moderate burns can help limit the spread of fires. Burn less than 30% in any year. Burn under conditions of good soil moisture and when plants are actively growing. ISSUES: Fire can be used to control weed invasions, although there are also risks of promoting weeds. |
| Comments | 11.9.12: Extensively utilised for cropping and improved pastures. Usually occurs in close association with RE 11.9.5. This regional ecosystem forms a distinct image-pattern on historical remote aerial imagery. Previously widespread in the Taroom-Theodore districts. Naturalised species associated with this regional ecosystem include *Malvastrum americanum and *Hibiscus trionum. |
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.
