Regional ecosystem details for 2.3.67
| Regional ecosystem | 2.3.67 |
|---|---|
| Vegetation Management Act class | Of concern |
| Wetlands | Palustrine |
| Biodiversity status | Of concern |
| Subregion | 2, 8, (3) |
| Estimated extent1 | Pre-clearing 4000 ha; Remnant 2021 4000 ha |
| Short description | Dinebra neesii, Panicum trachyrhachis, Dichanthium sericeum and Oryza spp. in mixed tussock grasslands in shallow depressions on Tertiary clay plains |
| Structure code | Tussock Grassland |
| Description | Mixed tussock grassland, including combinations of the species Dinebra neesii, Panicum trachyrhachis, Dichanthium sericeum subsp. polystachyum, Oryza spp., Cyperus sp. and Astrebla spp. small areas of Chenopodium auricomum dwarf shrubland may occur. Occurs in shallow depressions on broad, Tertiary clay plains. Mottled brown cracking clay soils. Palustrine. (BVG1M: 34d). |
| Fire management guidelines | SEASON: March to April, with occasional storm burns if woody weeds are a problem. INTENSITY: Low, occasionally moderate and high intensities. INTERVAL: 3-6 years south of latitudes below Karumba, 1-3 years to the north. INTERVAL_MIN: 1. INTERVAL_MAX: 6. STRATEGY: 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: 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. Overgrazing can reduce fuel loads and give woody species a competitive advantage. |
| Comments | 2.3.67: A rare vegetation comminity. Was previously mapped as 2.3.4x1b. Subject to degradation from high total grazing pressure including invasion by Vachellia farnesiana. |
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.
