Regional ecosystem details for 11.12.21
| Regional ecosystem | 11.12.21 |
|---|---|
| Vegetation Management Act class | Endangered |
| Wetlands | Not a Wetland |
| Biodiversity status | Endangered |
| Subregion | 22, 2, 12, (18), (14), (5), (27), (21), (13), (19), (17), (15) |
| Estimated extent1 | Pre-clearing 75000 ha; Remnant 2021 6000 ha |
| Short description | Acacia harpophylla open forest on igneous rocks. Colluvial lower slopes |
| Structure code | Open Forest |
| Description | Acacia harpophylla open forest with or without semi-evergreen vine thicket species. A moderately tall dense shrub layer of Geijera parviflora and Eremophila mitchellii may occur where semi-evergreen vine thicket species are absent. Lower shrubs of Carissa ovata, Alectryon sp. and Capparis spp. may also be present. Occurs on Mesozoic to Proterozoic igneous rocks on colluvial lower slopes of volcanic hills and strongly undulating plains. Soils range from moderately deep cracking clays to clay loams and deep texture contrast soils. Not a Wetland. (BVG1M: 25a). |
| Supplementary description | Speck et al. (1968), Orana (5) Toonda (4), Torsdale (6) |
| Protected areas | Auburn River NP |
| Special values | 11.12.21: Potential habitat for NCA listed species: Denhamia parvifolia. |
| Fire management guidelines | INTERVAL: Fire return interval not relevant. INTERVAL_MIN: 100. INTERVAL_MAX: 100. STRATEGY: This vegetation requires protection from wildfire. Protection primarily relies on broad-scale management of surrounding country with numerous small fires throughout the year so that wildfires will be very limited in extent. Maintenance of fire breaks may be appropriate on flat country, but natural features will be useful as breaks in 'wild' country. ISSUES: Fuel reduction in the surrounding vegetation under low fire danger conditions and/or revegetation of cleared areas reduce the risk of damaging wildfires. Maintain or re-establish native vegetation communities adjacent to this ecosystem. Grazing may be useful in managing fuel loads created by introduced grasses such as buffel. |
| Comments | 11.12.21: Extensively cleared for cropping and pasture. |
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.
