Regional ecosystem details for 7.3.28
| Regional ecosystem | 7.3.28 |
|---|---|
| Vegetation Management Act class | Of concern |
| Wetlands | Riverine |
| Biodiversity status | Endangered |
| Subregion | 1, 3, 2, 9, 6, 7, (5), (4), (8), (9.3), (9.6), (9.4) |
| Estimated extent1 | Pre-clearing 9000 ha; Remnant 2021 9000 ha |
| Short description | Rivers and streams including riparian herbfield and shrubland on river and stream bed alluvium and rock within stream beds |
| Structure code | Bare |
| Description | Rivers and streams including riparian herbfield and shrubland on river and stream bed alluvium, and rock within stream beds. Occurs on alluvial gravels, sands and sandy loams of river and stream beds, where substrate is unstable and subject to regular change, and also rock of any type within creek beds. Riverine. (BVG1M: 16d). Vegetation communities in this regional ecosystem include: 7.3.28a: Open water within natural non-tidal rivers. Rivers and creeks. Riverine. (BVG1M: 16d). 7.3.28b: Bare sand or silt, herblands, grasslands, shrublands and woodlands (exotic species, particularly of grasses and herbs may dominate). Flood deposited gravel and sand banks in the beds of major streams. Riverine. (BVG1M: 16d). 7.3.28c: Melaleuca viminalis shrubland. Rock cobble and gravel deposits of the active flood path of major streams. Riverine. (BVG1M: 16d). 7.3.28d: Unvegetated rock. Creek beds and banks. Riverine. (BVG1M: 16d). |
| Supplementary description | Stanton and Stanton (2005), A260b, A260c, A101, M260h, G260h, R260h, B260h, A231, G231, R231; Kemp and Morgan (1999), 43, 44; Kemp et al. (1999), 40, 41; |
| Protected areas | Girringun NP, Wooroonooran NP, Tully Gorge NP, Paluma Range NP, Daintree NP (CYPAL), Mount Windsor NP, Japoon NP, Barron Gorge NP, Koombooloomba NP, Mount Lewis NP, Gadgarra NP, Millstream Falls NP, Girramay NP, Davies Creek NP, Eubenangee Swamp NP, Ngalb |
| Special values | 7.3.28: An important component of stream ecology and structure influencing substrate types, depth gradients, flow characteristics and flooding characteristics. |
| Fire management guidelines | INTERVAL: Fire return interval not relevant. INTERVAL_MIN: 100. INTERVAL_MAX: 100. STRATEGY: Do not burn deliberately. Perimeter burning early in the fire season may limit the extent and intensity of wildfire incursions. Burning may be useful for weed management. ISSUES: Coastal she-oaks and river oaks are sensitive to fire. Fire in the litter layer of these oaks will be of low intensity and patchy. Storm burning may be useful to minimise scorch intensity to fire sensitive Casuarina. No active fire management required, except as part of weed control. Fire could be useful in controlling Singapore daisy, Sphagneticola trilobata, Lantana camara and high biomass grasses. |
| Comments | 7.3.28: Occurs on most streams and rivers with sand bars. This regional ecosystem is subject to regular, variable disturbance and is highly susceptible to weed invasion. Weed species including Psidium guajava, Lantana camara, Megathyrsus maximus, Urochloa mutica, Ageratum houstonianum and Stachytarpheta jamaicensis are often very abundant. |
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.
