Regional ecosystem details for 2.3.34
| Regional ecosystem | 2.3.34 |
|---|---|
| Vegetation Management Act class | Least concern |
| Wetlands | Palustrine |
| Biodiversity status | No concern at present |
| Subregion | 4, (6), (5), (3), (1), (8), (9.1), (9.3), (9), (3.8), (9.2) |
| Estimated extent1 | Pre-clearing 109000 ha; Remnant 2021 109000 ha |
| Short description | Seasonal swamps. Mixed sedgelands, grasslands and forblands in circular depressions on podsolic soils |
| Structure code | Herbland |
| Description | Seasonal swamps. Mixed sedgelands, grasslands and forblands, including combinations of the species Eleocharis spp., Pseudoraphis spinescens, Oryza australiensis and Ludwigia spp. A narrow wooded fringe commonly occurs, including Eucalyptus microtheca. E. camaldulensis and Corymbia spp. Occurs in rounded shallow closed depressions which are seasonally flooded. Yellow podsolic soils. Palustrine. (BVG1M: 34d). Vegetation communities in this regional ecosystem include: 2.3.34a: [RE not in use]²: This vegetation community is now mapped as 2.3.34c. Seasonal swamps with a combination of grasses and sedges, including Pseudoraphis spinescens, Eleocharis spp. and Nymphoides spp. A wooded fringe commonly occurs, including Eucalyptus camaldulensis (predominantly), E. microtheca, Corymbia polycarpa, Melaleuca viridiflora, Asteromyrtus symphyocarpa and Excoecaria parvifolia. Occurs in closed depressions on broad, Tertiary sand sheets around the Mitchell - Gilbert Fans subregion. Clay soils. Small areas of open water may occur. Palustrine. (BVG1M: 34d). 2.3.34b: [RE not in use]²: This vegetation community is now mapped as 2.3.51. Seasonal swamps with a combination of grasses and sedges, including Pseudoraphis spinescens, Eleocharis spp. and annual species. A variable wooded fringe commonly occurs, including Eucalyptus camaldulensis, E. microtheca, Melaleuca viridiflora, M. nervosa and Acacia cambagei. Occurs in closed depressions on broad, Tertiary sand sheets around the Claraville Plains subregion. Clay soils. Small areas of open water may occur. Palustrine. (BVG1M: 34d). 2.3.34c: Seasonal swamps. Eleocharis spp. sedgelands, commonly with Nymphoides crenata. Pseudoraphis spinescens and Ludwigia octovalvis may occur. A wooded fringe of Eucalyptus camaldulensis commonly occurs. Small areas of open water may occur. Occurs in closed depressions on broad sand sheets and old alluvial surfaces around the Mitchell - Gilbert Fans subregion. Clay soils. Palustrine. (BVG1M: 34d). 2.3.34d: Seasonal swamps. Eleocharis spp. sedgeland to closed sedgeland, occasionally with Oryza australiensis. Pseudoraphis spinescens and Marsilea spp. May occur. A narrow wooded fringe of Eucalyptus microtheca commonly occurs. Occurs in closed depression on active Quaternary alluvial plains (not associated with river deltas). Cracking clay soils. Palustrine. (BVG1M: 34d). 2.3.34e: Seasonal swamps. Mixed sedgelands, grasslands and forblands, including combinations of the species Eleocharis spp., Ludwigia peploides, Pseudoraphis spinescens, and Oryza spp. Nymphaea spp. and Nymphoides indica may occur in deeper water. A narrow wooded fringe may occur, including Corymbia polycarpa, C. bella and Eucalyptus microtheca. Occurs in closed depressions on active alluvial plains (inner zones of river deltas). Cracking clay soils. Palustrine. (BVG1M: 34d). 2.3.34f: Seasonal swamps. Oryza australiensis tussock grassland, commonly with Pseudoraphis spinescens and Eleocharis spp. A narrow wooded fringe may occur, including Eucalyptus microtheca and Excoecaria parvifolia. Occurs in closed depressions on active Quaternary alluvial plains (outer zones of river deltas). Cracking clay soils. Palustrine. (BVG1M: 34d). 2.3.34g: Seasonal swamps. Mixed tussock grassland to closed tussock grassland, including combinations of the species Chrysopogon elongatus, Panicum trachyrhachis, Fimbristylis spp., Pseudoraphis spinescens and Eriachne glauca. A wooded fringe of Eucalyptus camaldulensis commonly occurs. Occurs in closed depressions on Tertiary lateritic surfaces in the Donors Plateau subregion. Palustrine. (BVG1M: 34d). |
| Supplementary description | Perry et al. (1964), Mayvale |
| Protected areas | Staaten River NP, Errk Oykangand NP (CYPAL) |
| Special values | 2.3.34: Seasonal wetland. Important feeding sites for water birds. 2.3.34a: Seasonal wetland. Important feeding and moulting sites for water birds. 2.3.34b: Seasonal wetland. Important feeding and moulting sites for water birds. 2.3.34c: Seasonal wetland. Important feeding and moulting sites for water birds. 2.3.34d: Seasonal wetland. Important feeding and moulting sites for water birds. 2.3.34e: Seasonal wetland. Important feeding and moulting sites for water birds. 2.3.34f: Seasonal wetland. Important feeding and moulting sites for water birds. 2.3.34g: Seasonal wetland. Important feeding and moulting sites for water birds. |
| Fire management guidelines | SEASON: Early to mid-dry season. a, b: March to April, with occasional storm burns if woody weeds are a problem. INTENSITY: Low to moderate. a, b: Low, occasionally moderate and high intensities. INTERVAL: 1-5 years. a, b: 3-6 years in latitudes south of Karumba, 1-3 years to the north. INTERVAL_MIN: 1. INTERVAL_MAX: 6. STRATEGY: Maintain mosaic of time since burnt and unburnt patches in surrounding fire-adapted landscape to mitigate impacts of unplanned fire. a, b: Do not actively target burning of sedgelands. Commence burning early in dry season to break up continuity of fuel across the landscape. Mosaic burning across the landscape at varying frequency will create patches at varying stages of post-fire response. Burn with good soil moisture to promote regeneration. ISSUES: These do not necessarily readily burn because ground fuels are sparse. Riparian areas contain important habitat for fauna. a, b: Retaining grasslands by preventing woody thickening may be an issue in some situations. A long absence of fire or low intensity fire too early in the season may lead to overabundant seedlings and saplings. Invasive and high biomass grasses (e.g., buffel, Para and grader grasses) may increase fire severity to the detriment of these ecosystems. |
| Comments | 2.3.34: Eleocharis spp. are commonly excavated by feral pigs. May be converted to dams for livestock water. Subject to degradation from high total grazing pressure, particularly in the dry season. 2.3.34a: Eleocharis spp. are commonly excavated by feral pigs. Subject to degradation from high total grazing pressure, particularly in the dry season. 2.3.34b: Eleocharis spp. are commonly excavated by feral pigs. May be converted to dams for livestock water. Subject to degradation from high total grazing pressure, particularly in the dry season. 2.3.34c: Eleocharis spp. are commonly excavated by feral pigs. Subject to degradation from high total grazing pressure, particularly in the dry season. 2.3.34d: Was previously mapped as 2.3.11x2a. Eleocharis spp. are commonly excavated by feral pigs. Subject to degradation from high total grazing pressure during dry season. May be converted to dams for livestock water. 2.3.34e: Was previously mapped as 2.3.11x2b. Eleocharis spp. are commonly excavated by feral pigs. Subject to degradation from high total grazing pressure during dry season. 2.3.34f: Was previously mapped as 2.3.11x2c. Eleocharis spp. are commonly excavated by feral pigs. Subject to degradation from high total grazing pressure during dry season. 2.3.34g: Subject to degradation from high total grazing pressure, particularly in the dry season. |
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.
