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Regional ecosystem details for 12.1.1

Regional ecosystem 12.1.1
Vegetation Management Act class Of concern
Wetlands Estuarine wetlands (e.g. mangroves).
Biodiversity status Of concern
Subregion 4, 10, 8, 9, (3), (2), (7)
Estimated extent1 Pre-clearing 6000 ha; Remnant 2017 4000 ha
Extent in reserves High
Short description Casuarina glauca woodland on margins of marine clay plains
Structure category Sparse
Description Casuarina glauca open forest to low open woodland. Occurs on margins of Quaternary estuarine deposits. (BVG1M: 28a)
Supplementary description Ryan, T.S. (ed.) (2012), Bean et al. (1998), A2
Protected areas Southern Moreton Bay Islands NP, Great Sandy CP, Pumicestone NP, Great Sandy NP, Burrum Coast NP, Bribie Island NP, Eurimbula NP, Curtis Island CP, Eurimbula RR, Eudlo Creek CP, Coombabah Lake CP, Curtis Island NP, Coolum Creek CP, Wild Cattle Island NP,
Special values Provides estuarine wetland habitat.
Fire management guidelines SEASON: Early winter or storm burning seasons. INTENSITY: Low to moderate. INTERVAL: Aim for a 6-7 year minimum threshold at a broad scale planning level. STRATEGY: Aim to retain at least 25-50% unburnt in any given year. This RE needs disturbance to maintain structure. Use fire to reduce opportunistic native (Allocasuarina spp.) or weed species dominance. Active fire management is required to reduce the accumulation of a significant dry fuel layer. Burns planned in surrounding REs should account for the disturbance requirements of this fringing vegetation. ISSUES: The fire ecology of this regional ecosystem is poorly known. Monitoring the impact of fire and recovery of the ecosystem's component species is highly desirable. A long fire interval could increase fire intensity when fire occurs, thus detrimentally affecting the tree layer. Recovery should be relatively quick (approximately 10 years to a woodland/open forest community). A 'grassy' ecosystem might be lost if fire is excluded or too frequent (<2 years). Signs of problems in this community might include the regeneration of 'whipstick' communities and/or the presence of weeds (such as lantana). Fire exclusion and buffering from fire is not necessary. Where obligate seeding allocasuarinas are present in the under- and mid-storeys, fires causing 100% leaf scorch will kill these trees; therefore fires of this intensity should be avoided. A seven year minimum fire interval is required for obligate seeding allocasuarinas and casuarinas.
Comments Patches often too small to map at 1:100 000. Infrequently tidally inundated. This RE occupies a very small niche at upper end of tidal zone.

1 Estimated extent is from version 11 pre-clearing and 2017 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.

Licence
Creative Commons Attribution 4.0 International (CC BY 4.0)
Last updated
16 April 2019
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