Regional ecosystem details for 2.3.33
| Regional ecosystem | 2.3.33 |
|---|---|
| Vegetation Management Act class | Least concern |
| Wetlands | Palustrine |
| Biodiversity status | Of concern |
| Subregion | 5, 8, (2), (3), (1), (7), (4.5) |
| Estimated extent1 | Pre-clearing 60000 ha; Remnant 2021 59000 ha |
| Short description | Eucalyptus microtheca open woodland and sedges in circular depressions in sand plains, on cracking clays |
| Structure code | Open Woodland |
| Description | Seasonal swamps (wooded). Eucalyptus microtheca open woodland over Aeschynomene indica, Eleocharis spp., Marsilea spp. and Pseudoraphis spinescens on margins of larger depressions and in centres of smaller depressions. Astrebla spp. or Aristida spp. in centres of larger depressions. Occurs on closed depressions on sandy Tertiary plains; cracking clays, with solodised solonetz in centres of larger depressions. Palustrine. (BVG1M: 34d). Vegetation communities in this regional ecosystem include: 2.3.33a: Seasonal swamps (wooded). Eucalyptus microtheca and/or Acacia cambagei low woodland to woodland, commonly with Excoecaria parvifolia. The ground layer is tussock grasses or sedges. Occurs in closed depressions in Quaternary residual sandsheets overlying Tertiary clay deposits. Cracking clay soils. Palustrine. (BVG1M: 34d). 2.3.33b: Seasonal swamps (wooded). Eucalyptus microtheca low woodland to woodland, occasionally with Excoecaria parvifolia and Lysiphyllum cunninghamii. The ground layer is tussock grasses, sedges and forbs, including Pseudoraphis spinescens, Brachyachne convergens and Fimbristylis dichotoma. Occurs in closed depressions on Tertiary lateritic plateau surfaces. Cracking clay soils. Palustrine. (BVG1M: 34d). 2.3.33c: [RE not in use]²: This vegetation community is now mapped as 2.3.61c. Eucalyptus microtheca woodland, occasionally with Melaleuca viridiflora and M. citrolens. The ground layer is tussock grasses or sedges, including Eriachne spp., Panicum sp. and Cyperus macrostachyos. Occurs in seasonal swamps (wooded) in closed depressions in the Yappar River - Belmore Creek alluvial system (overlying Cretaceous siltstones). Palustrine. (BVG1M: 34d). 2.3.33x1: [RE not in use]²: This regional ecosystem is now mapped as 2.3.39b. Aristida hygrometrica or Eriachne mucronata or Oxychloris spp. tussock grassland. Includes extinct mound springs with Eucalyptus camaldulensis +/- Pandanus tectorius woodland or Eucalyptus microtheca woodland or Corymbia confertiflora woodland. Occurs on artesian springs. Palustrine. (BVG1M: 34e). 2.3.33x2: [RE not in use]²: This regional ecosystem is now mapped as 2.7.3x6. Springs. Occurs on mudstone springs. Palustrine. (BVG1M: 34e). |
| Supplementary description | Perry et al. (1964), Bylong |
| Special values | 2.3.33: Seasonal wetland. Important feeding sites for water birds. 2.3.33a: Seasonal wetland. Important feeding and moulting sites for water birds. 2.3.33b: Seasonal wetland. Important feeding and moulting sites for water birds. 2.3.33c: Seasonal wetland. Important feeding and moulting sites for water birds. |
| 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. ISSUES: Restrict extent and intensity of fires. High intensity and extensive fires will degrade vegetation structure and destroy animal habitats. Burn only under mild conditions. |
| Comments | 2.3.33: High total grazing pressure. 2.3.33a: A poorly surveyed vegetation community. 2.3.33b: A poorly surveyed vegetation community. 2.3.33x1: Subject to degradation from high total grazing pressure and damage from feral pig diggings. 2.3.33x2: Soda Springs near the Mitchell River. Subject to degradation from high total grazing pressure and damage from feral pig diggings. |
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.
