Regional ecosystem details for 9.3.22
| Regional ecosystem | 9.3.22 |
|---|---|
| Vegetation Management Act class | Least concern |
| Wetlands | Not a Wetland |
| Biodiversity status | Of concern |
| Subregion | 4, 2, (6), (5), (2.9), (7.5) |
| Estimated extent1 | Pre-clearing 102000 ha; Remnant 2021 99000 ha |
| Short description | Eucalyptus crebra or E. cullenii +/- Corymbia spp. open woodland on alluvial levees and terraces |
| Structure code | Open Woodland |
| Description | Open woodland of Eucalyptus crebra (narrow-leaved ironbark) or E. cullenii (Cullen's ironbark) and Corymbia clarksoniana (Clarkson's bloodwood) and/or C. dallachiana (Dallachy's gum). The shrub layer can be absent to open and the ground layer is grassy. Occurs on levees, terraces and banks of larger rivers and on flat to very gentle slopes associated with drainage lines. Not a Wetland. (BVG1M: 16c). Vegetation communities in this regional ecosystem include: 9.3.22a: Open woodland to woodland of Eucalyptus crebra (narrow-leaved ironbark), Corymbia clarksoniana (Clarkson's bloodwood) and/or C. dallachiana (Dallachy's gum) +/- E. platyphylla (poplar gum) +/- E. brownii (Reid River box) +/- Eucalyptus spp., with E. platyphylla and E. brownii sometimes dominating in small patches in the southeast. An open sub-canopy can occur and includes canopy species, Grevillea striata (beefwood) and Lophostemon grandiflorus (Northern swamp box). The dense grassy ground layer is dominated by Heteropogon contortus (black speargrass) and Dichanthium sp. Occurs on levees, terraces and banks of larger rivers and on flat to very gentle slopes associated with drainage lines. Not a Wetland. (BVG1M: 16c). 9.3.22b: Woodland of Eucalyptus cullenii (Cullen's ironbark) +/- Corymbia erythrophloia (red bloodwood) +/- C. dallachiana (Dallachy's gum). The mid-layer can contain Planchonia careya (cocky apple) +/- Grevillea mimosoides. Occurs on alluvial flats along major streams. Not a Wetland. (BVG1M: 18b). |
| Protected areas | Blackbraes NP, Girringun CP, Girringun NP, Girringun RR, Paluma Range NP |
| Special values | 9.3.22: Potential habitat for NCA listed species: Macropteranthes montana. |
| Fire management guidelines | SEASON: Early dry season and storm time. Timing of early dry season burns will vary depending on seasonal conditions; it may sometimes commence as early as March. INTENSITY: Low, with occasional moderate. INTERVAL: 2-5 year intervals with longer unburnt patches. Fuel loads tend to reach a maximum after 2-3 years. Ensure burn programs occur after big wet season as fuel loads will be higher than average. INTERVAL_MIN: 2. INTERVAL_MAX: 5. STRATEGY: Burn less than 40% across the landscape in any year. Burning through the early dry season will produce a network of burns that will contain later fires. Fires will only gain in intensity as the dry season progresses. Grass composition can be affected by timing and intensity of fire. Occasional moderate fire will help to reduce overabundant trees that could potentially suppress ground layer vegetation. ISSUES: Leave areas of long unburnt vegetation to maintain a diversity of habitat for wildlife. |
| Comments | 9.3.22: Occurs extensively in the south of the bioregion. Subject to clearing. Vulnerable to invasion by exotic weed species including Themeda quadrivalvis (grader grass), Melinis repens (Red Natal grass), Mesosphaerum suaveolens and Bidens pilosa (cobbler's peg),. 9.3.22a: Occurs extensively in the south of the bioregion. 9.3.22b: Occurs along the Walsh River between Dimbulah and Chillagoe in the central bioregion. |
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.
