Regional ecosystem details for 9.3.9
| Regional ecosystem | 9.3.9 |
|---|---|
| Vegetation Management Act class | Of concern |
| Wetlands | Not a Wetland |
| Biodiversity status | Endangered |
| Subregion | 5, 4 |
| Estimated extent1 | Pre-clearing 2000 ha; Remnant 2021 800 ha |
| Short description | Acacia cambagei +/- A. harpophylla woodland on cracking clay soils |
| Structure code | Woodland |
| Description | Woodland to low closed forest of Acacia cambagei (gidgee) +/- A. harpophylla (brigalow). There is often an open sub-canopy which can contain A. cambagei, Lysiphyllum carronii (Queensland ebony), Eremophila mitchellii (false sandalwood) and Terminalia oblongata (yellowwood). Canopy species can also be found in an open shrub layer along with Carissa lanceolata (currantbush) and Atalaya hemiglauca (whitewood). The ground layer contains a range of grasses and forbs and is seasonally dependent. Occurs on run-on areas and gentle drainage depressions on cracking clay soils. Not a Wetland. (BVG1M: 26a). |
| Special values | 9.3.9: Possible regional refuge for some species. |
| Fire management guidelines | INTERVAL: 10-50 years generally following periods of high rainfall and sufficient grass growth. INTERVAL_MIN: 10. INTERVAL_MAX: 50. STRATEGY: Do not target for fires. Can tolerate only very early dry season fires, under mild conditions, that trickle along the ground layer. Control fuel loads in the surrounding vegetation. ISSUES: Gidgee is only tolerant of mild 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. |
| Comments | 9.3.9: Occurs in a restricted area east of the Great Basalt Wall in the south of the bioregion. Vulnerable to invasive weed species Cryptostegia grandiflora (rubber vine) and Malvastrum americanum (spiked Malvastrum) and exotic pasture species Cenchrus ciliaris (buffel grass) and Bothriochloa pertusa (Indian couch). |
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.
