Regional ecosystem details for 2.3.18
| Regional ecosystem | 2.3.18 |
|---|---|
| Vegetation Management Act class | Least concern |
| Wetlands | Not a Wetland |
| Biodiversity status | Of concern |
| Subregion | 2, 5, 8, (1.3), (3) |
| Estimated extent1 | Pre-clearing 16000 ha; Remnant 2021 16000 ha |
| Short description | Atalaya hemiglauca, Grevillea striata, Vachellia sutherlandii and Eucalyptus microtheca in mixed low woodlands on active Quaternary alluvial plains |
| Structure code | Low Woodland |
| Description | Mixed low woodland, including combinations of the species Atalaya hemiglauca, Grevillea striata, Vachellia sutherlandii, Eucalyptus microtheca, Corymbia terminalis and Acacia cambagei. The ground layer is tussock grasses, including Aristida latifolia, Dichanthium spp. and Eriachne spp. Occurs on minor, active Quaternary alluvial plains. Brown silty clay to cracking clay soils. Not a Wetland. (BVG1M: 27b). Vegetation communities in this regional ecosystem include: 2.3.18a: [RE not in use]²: This vegetation community has been amalgamated into 2.3.18. Mixed low woodland including combinations of the species Atalaya hemiglauca, Grevillea striata, Vachellia sutherlandii, Eucalyptus microtheca, Corymbia terminalis, Acacia cambagei. The ground layer is tussock grasses, including Aristida latifolia, Dichanthium spp. and Eriachne spp. Occurs on minor Quaternary alluvial plains, commonly subject to erosion. Brown silty clay to cracking clay soils. Not a Wetland. (BVG1M: 27b). 2.3.18x1: [RE not in use]²: This regional ecosystem is now mapped as 2.3.46. Corymbia terminalis, C. aparrerinja woodland, commonly with Lysiphyllum cunninghamii. Eucalyptus microtheca, Acacia cambagei, Grevillea striata, E. pruinosa, E. leucophylla and Atalaya hemiglauca may occur in the canopy. A variable shrub layer commonly occurs, including Acacia spp. and Carissa lanceolata. The ground layer is tussock grasses. Occurs on levees of watercourses extending from drier, southern parts of the Northwest Highlands bioregion. Red to brown sandy loam and silty loam soils. Not a Wetland. (BVG1M: 16b). 2.3.18x2a: [RE not in use]²: This vegetation community has been amalgamated into 2.3.69b. Mixed tussock grassland including combinations of the species Brachyachne convergens, Sporobolus australasicus, Chloris spp., Aristida latifolia, Dactyloctenium radulans and Iseilema spp. Emergent Eucalyptus microtheca, Lysiphyllum cunninghamii, Atalaya hemiglauca, Acacia cambagei and Grevillea striata may occur. Occurs on minor Quaternary alluvial plains in dissected lateritic landscapes. Commonly subject to erosion. Brown silty clay soils. Not a Wetland. (BVG1M: 31a). 2.3.18x2b: [RE not in use]²: This vegetation community has been amalgamated into 2.3.69b. Mixed tussock grassland including combinations of the species Brachyachne convergens, Aristida latifolia, Chloris spp., Sporobolus australasicus and Dactyloctenium radulans. Emergent Atalaya hemiglauca, Eucalyptus microtheca, Acacia cambagei and Grevillea striata may occur. Occurs on narrow Quaternary alluvial plains, adjacent to watercourses within broad clay plains. Commonly subject to erosion. Brown silty clay to cracking clay soils. Not a Wetland. (BVG1M: 31a). 2.3.18x2c: [RE not in use]²: This vegetation community has been amalgamated into 2.3.69b. Mixed tussock grassland including combinations of the species Sporobolus actinocladus, Aristida spp., Oxychloris scariosa, Chloris spp. and Eragrostis spp. Emergent Acacia cambagei commonly occurs. Occurs on levees and minor alluvial plains, commonly on watercourses extending from drier, southern parts of the Northwest Highlands bioregion. Red to brown sandy loam and silty loam soils. Not a Wetland. (BVG1M: 31a). 2.3.18x41: [RE not in use]²: This regional ecosystem is now mapped as 2.4.5. Mixed low woodland to low open woodland with combinations of the species Atalaya hemiglauca, Grevillea striata, Acacia victoriae and Vachellia sutherlandii. Acacia cambagei and Ventilago viminalis may also occur in the canopy. The ground layer is tussock grasses, including Dichanthium spp., Astrebla spp., Aristida latifolia, Panicum decompositum, Chrysopogon fallax, Eulalia aurea, Iseilema sp. Occurs on Tertiary clay plains. Grey to brown cracking clay soils. Not a Wetland. (BVG1M: 27a). |
| Supplementary description | Neldner (1991), 3, 14; Perry et al. (1964), Cloncurry, Gregory, Balbarini, Georgina |
| Fire management guidelines | INTERVAL: Exclude fire, wherever possible. INTERVAL_MIN: 100. INTERVAL_MAX: 100. STRATEGY: Burn less than 30% in any year. Buffer as indicated by fuel build-up in surrounding vegetation. ISSUES: Species in this vegetation unit may be eliminated by fire. |
| Comments | 2.3.18: Survey required to verify condition. Was previously partly mapped as 2.3.18a. Prone to scalding and erosion. Widespread degradation due to high total grazing pressure. 2.3.18a: Subject to degradation from high total grazing pressure. 2.3.18x1: Subject to degradation from high total grazing pressure and invasion by exotic species, particularly *Cenchrus pennisetiformis. 2.3.18x2a: Subject to degradation from high total grazing pressure. 2.3.18x2b: Subject to degradation from high total grazing pressure. 2.3.18x2c: Subject to degradation from high total grazing pressure. 2.3.18x41: Subject to degradation from high total grazing pressure. |
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.
2 Superseded: Revision of the regional ecosystem classification removed this regional ecosystem code from use. It is included in the regional ecosystem description database because the RE code may appear in older versions of RE mapping and the Vegetation Management regulation.
