Regional ecosystem details for 2.3.9
| Regional ecosystem | 2.3.9 |
|---|---|
| Vegetation Management Act class | Least concern |
| Wetlands | Not a Wetland |
| Biodiversity status | Of concern |
| Subregion | 4, (6), (3.8) |
| Estimated extent1 | Pre-clearing 386000 ha; Remnant 2021 370000 ha |
| Short description | Lysiphyllum cunninghamii and/or Eucalyptus microtheca +/- Corymbia confertiflora low open woodland on active Quaternary alluvial plains (outer zones of river deltas) |
| Structure code | Low Open Woodland |
| Description | Lysiphyllum cunninghamii and/or Eucalyptus microtheca low open woodland to low woodland, commonly with Corymbia confertiflora, C. bella and E. chlorophylla. Atalaya hemiglauca and Grevillea striata may occur in the canopy. The ground layer is tussock grasses, including Themeda arguens, Eriachne spp., Eragrostis concinna and Dichanthium spp. Small patches of grassland commonly occur. Occurs on active Quaternary alluvial plains (outer zones of river deltas). Texture contrast and non-cracking clay soils. Not a Wetland. (BVG1M: 16c). Vegetation communities in this regional ecosystem include: 2.3.9a: [RE not in use]²: This vegetation community has been amalgamated into 2.3.9. Lysiphyllum cunninghamii and/or Eucalyptus microtheca low open woodland, commonly with Corymbia confertiflora, C. bella and E. chlorophylla. Atalaya hemiglauca and Grevillea striata may occur in the canopy. The ground layer is tussock grasses, including Themeda arguens, Eriachne spp., Eragrostis concinna and Dichanthium spp. Small patches of grassland commonly occur. Occurs on Quaternary alluvial plains (outer zones of river deltas). Occurs on Quaternary alluvial plains (outer zones of river deltas). Texture contrast and non-cracking clay soils. Not a Wetland. (BVG1M: 16c). 2.3.9b: [RE not in use]²: This vegetation community is now mapped as 2.3.10f. Mixed low open woodland to open woodland, including combinations of the species Corymbia confertiflora, Lysiphyllum cunninghamii, Eucalyptus chlorophylla, E. leptophleba. The ground layer is tussock grasses, including Heteropogon contortus, Aristida dominii and Eragrostis sp. Small patches of grassland commonly occur. Occurs on Quaternary alluvial plains of major watercourses. Silty loams and texture contrast soils. Not a Wetland. (BVG1M: 16c). 2.3.9x1: [RE not in use]²: This regional ecosystem is now mapped as 2.3.41. Aristida dominii, Chloris spp. and Eriachne spp. tussock grassland, commonly with Eragrostis spp., Iseilema sp., Themeda arguens and Brachyachne convergens (short grass grassland). Emergent Corymbia confertiflora, Lysiphyllum cunninghamii and Eucalyptus chlorophylla commonly occur. Occurs on Quaternary alluvial plains, commonly associated with major watercourses. Silty loam soils. Not a Wetland. (BVG1M: 31a). 2.3.9x2a: [RE not in use]²: This vegetation community is now mapped as 2.3.44a. Themeda arguens, Eriachne spp., Oryza australiensis, Eulalia aurea and Dichanthium spp. tussock grassland, commonly with Chloris lobata, Iseilema sp., and Panicum trachyrhachis. Emergent Eucalyptus microtheca, Corymbia bella and Excoecaria parvifolia may occur. Occurs on Quaternary alluvial plains (inner zones of river deltas). Cracking clay soils. Not a Wetland. (BVG1M: 32a). 2.3.9x2b: [RE not in use]²: This vegetation community is now mapped as 2.3.44b. Eriachne spp., Chrysopogon fallax, Eulalia aurea and Dichanthium spp. tussock grassland, commonly with Oryza australiensis and Ophiuros exaltatus. Emergent Lysiphyllum cunninghamii, Eucalyptus microtheca, Corymbia confertiflora, Corymbia dallachiana and E. chlorophylla commonly occur. Occurs on Quaternary alluvial plains (outer zones of river deltas). Texture contrast and non-cracking clay soils. Not a Wetland. (BVG1M: 32a). 2.3.9x2c: [RE not in use]²: This vegetation community is now mapped as 2.3.44c. Eriachne spp., Panicum spp., Chrysopogon spp. and Cyperaceae spp. tussock grassland. Emergent Corymbia polycarpa, Eucalyptus chlorophylla, Petalostigma banksii and Melaleuca spp. commonly occur. Occurs on level, old alluvial plains (recent Pleistocene surface). Texture contrast and sandy clay soils. Not a Wetland. (BVG1M: 32a). 2.3.9x2d: [RE not in use]²: This vegetation community is now mapped as 2.3.44d. Mixed tussock grassland, including combinations of the species Eriachne spp., Chrysopogon spp., Panicum spp., Dichanthium spp., Cyperaceae spp., Oryza australiensis. Emergent Eucalyptus microtheca, E. chlorophylla, Corymbia confertiflora, Melaleuca viridiflora may occur. Occurs in open drainage depressions, commonly on old alluvial plains (recent Pleistocene surface). Not a Wetland. (BVG1M: 32a). |
| Supplementary description | Perry et al. (1964), Glenore, Miranda, Gilbert |
| Protected areas | Errk Oykangand NP (CYPAL) |
| Special values | 2.3.9: Potential habitat for NCA listed species: Fimbristylis carolinii. |
| Fire management guidelines | SEASON: Early to mid-dry season. INTENSITY: Low to moderate. INTERVAL: 1-5 years. INTERVAL_MIN: 1. INTERVAL_MAX: 5. STRATEGY: Burn less than 30% in any year. Buffer as indicated by fuel build-up in surrounding vegetation. Restrict extent and intensity of fires. Burn only under mild conditions. ISSUES: Intense and extensive fires will degrade vegetation structure and destroy animal habitats. |
| Comments | 2.3.9: This regional ecosystem poorly known. More information on condition required to confirm conservation status. Subject to high total grazing pressure during wet season leading to wind erosion and scalding. 2.3.9a: Subject to high total grazing pressure during wet season leading to wind erosion and scalding. 2.3.9b: A rare vegetation community. 2.3.9x1: Subject to degradation from high total grazing pressure. 2.3.9x2a: Subject to degradation from high total grazing pressure. 2.3.9x2b: Subject to degradation from high total grazing pressure. 2.3.9x2c: Subject to degradation from high total grazing pressure. 2.3.9x2d: A poorly surveyed vegetation community. 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.
