Regional ecosystem details for 9.3.25
| Regional ecosystem | 9.3.25 |
|---|---|
| Vegetation Management Act class | Least concern |
| Wetlands | Contains Palustrine |
| Biodiversity status | Of concern |
| Subregion | 2, 5, 4, (6) |
| Estimated extent1 | Pre-clearing 18000 ha; Remnant 2021 18000 ha |
| Short description | Dichanthium spp., and/or Astrebla spp. +/- Iseilema spp. grassland on alluvial deposits derived from basalt soils |
| Structure code | Tussock Grassland |
| Description | Grassland of Dichanthium spp. and/or Astrebla spp. and Iseilema spp. +/- isolated trees of Eucalyptus microneura (Georgetown box) +/- E. coolabah (coolibah) +/- Grevillea striata (beefwood) +/- Lysiphyllum sp. +/- E. tereticornis (bluegum) +/- E. leptophleba (Molloy red box) +/- E. moluccana (gum-topped box) +/- E. platyphylla (poplar gum). Occurs on alluvial grey clay deposits derived from basalt soils (as compared with 9.3.26). Contains Palustrine. (BVG1M: 30b). Vegetation communities in this regional ecosystem include: 9.3.25a: Grassland of Dichanthium sp. on basalt derived soils. Occurs on basalt derived alluvium. Not a Wetland. (BVG1M: 30b). 9.3.25b: Swamps & run-on areas in grassland on basalt derived soils. Occurs on run-on areas from the basalt. Palustrine. (BVG1M: 34d). |
| Supplementary description | Galloway et al. (1970): Radnor, Balurga Unit 4, Koolburra Unit 3 |
| Protected areas | Girringun NP |
| Special values | 9.3.25: Significant habitat particularly for herbivores such as macropods and arboreal mammals. |
| Fire management guidelines | INTERVAL: Fire return interval not relevant. INTERVAL_MIN: 100. INTERVAL_MAX: 100. STRATEGY: Do not burn deliberately. The grasses and forbs of Astrebla spp. dominated communities do not require fire for regeneration. Protection relies on management of fire in the surrounding country to prevent running fires entering Astrebla spp. communities, particularly at times of low soil moisture. ISSUES: Fire can sometimes be used as a tool to control woody thickening and woody weeds in grasslands. Moderate intensity fire is required for a successful kill of the woody species but good moisture levels are required to ensure recovery of the ground layer. Large scale germination of woody species is most likely to occur in high rainfall years. The best management opportunity is usually after storms at the end of the subsequent dry season, although exclusion of grazing pressure may still be required to ensure sufficient fuel loads. |
| Comments | 9.3.25: This RE is distinguished from 9.3.27 by being on basalt derived alluvium transported out of basalt geologies NOT overlying basalt geologies. Occurs in patches through-out the central and southern bioregion. 9.3.25a: Occurs in patches through-out the central and southern bioregion. 9.3.25b: Occurs in patches through-out the central and southern bioregion. |
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.
