Regional ecosystem details for 6.3.2
| Regional ecosystem | 6.3.2 |
|---|---|
| Vegetation Management Act class | Least concern |
| Wetlands | Riverine |
| Biodiversity status | Of concern |
| Subregion | 10, 9, 8, (4.4), (6), (5.5), (5.6) |
| Estimated extent1 | Pre-clearing 94000 ha; Remnant 2021 90000 ha |
| Short description | Eucalyptus camaldulensis +/- E. coolabah +/- Acacia cambagei woodland on major drainage lines or rivers |
| Structure code | Woodland |
| Description | Eucalyptus camaldulensis with E. coolabah or occasionally Acacia cambagei woodland to low woodland canopy layer. Other scattered trees such as Atalaya hemiglauca, Lysiphyllum gilvum, Melaleuca trichostachya, Corymbia terminalis and Eucalyptus populnea may occur. A tall shrubby layer is frequently developed and dominated by species such as Acacia stenophylla, A. victoriae and Eremophila bignoniiflora with frequent species including Owenia acidula, Santalum lanceolatum and Acacia aneura. Low shrubs are present, but rarely form a distinct layer. Frequent species include Senna phyllodinea, Myoporum acuminatum, Eremophila deserti, Chenopodium auricomum and Duma florulenta. Ground cover is variable composed of grasses, sedges and with any one predominating depending on seasonal conditions. The ground layer is usually sparse and dominated by species such as Aristida spp., Dichanthium sericeum, Themeda triandra, Chrysopogon fallax and Leptochloa digitata. Occurs on the levees and banks of major drainage channels of recent alluvial origin. Associated soils include very deep grey and brown clays or sandy loams with silt and sand bands and minor areas of intermixed texture contrast soils. Riverine. (BVG1M: 16a). Vegetation communities in this regional ecosystem include: 6.3.2a: Eucalyptus coolabah open forest to woodland, commonly with Acacia cambagei. A secondary tree or shrub layer may occur, including Eremophila bignoniiflora and Lysiphyllum gilvum. The ground layer is seasonally variable, with perennial grasses and ephemeral forbs. Occurs fringing braided channels along narrow drainage lines in the north of the bioregion. Riverine. (BVG1M: 16a). 6.3.2b: Eucalyptus coolabah and/or Acacia harpophylla woodland, occasionally with Lysiphyllum gilvum. The ground layer is seasonally variable, with tussock grasses and forbs. Occurs on fringes of braided drainage lines below residual dissected lateritic tablelands in the north of the bioregion. Riverine. (BVG1M: 16a). |
| Supplementary description | Dawson (1974), W4 (LU 42); Boyland (1984), 1b; Neldner (1984), 12c (26), 47a; Mills (1980), W2 (LU 70) |
| Protected areas | Welford NP |
| Special values | 6.3.2: High fauna diversity, particularly mammal and bird species. |
| Fire management guidelines | INTERVAL: Fire return interval not relevant. INTERVAL_MIN: 100. INTERVAL_MAX: 100. STRATEGY: Manage surrounding country. ISSUES: This community does not need fire. Flood events drive recruitment. Hollow trees are critical habitat. High intensity and extensive fires will degrade vegetation structure and destroy animal habitats. Restrict extent and intensity of fires. |
| Comments | 6.3.2: Occurs on medium to small drainage lines with clay soils in the more western parts of the region compared to 6.3.1 which occurs on sandier soils and in more eastern parts. Highly modified structural and floristic composition as a result of high total grazing pressure. Condition fair to poor due to scalding caused by wind and water erosion (Dawson, 1974, LU 42).Naturalised species associated with this regional ecosystem include *Vachellia farnesiana. 6.3.2a: Occurs in the north of the region in the upper Bulloo River and Blackwater Creek areas. |
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.
