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Regional ecosystem details for 11.1.3

Regional ecosystem 11.1.3
Vegetation Management Act class Of concern
Wetlands Palustrine wetland (e.g. vegetated swamp).
Biodiversity status Of concern
Subregion 14, (1)
Estimated extent1 Pre-clearing 1000 ha; Remnant 2015 800 ha
Extent in reserves Low
Short description Sedgelands on marine clay plains
Structure category Very sparse
Description Sedgelands to grasslands on Quaternary estuarine deposits. Sedgeland dominated by a range of sedges and grasses which include Eleocharis philippinensis, Cyperus alopecuroides, C. scariosus and C. iria and the grasses Sporobolus virginicus and Paspalum vaginatum. Other typical species in shallower margins include Fimbristylis ferruginea, Phyla nodiflora and Cyperus polystachyos var. polystachyos. Occasional twiners such as Vincetoxicum carnosum may be present. Occurs in depressions on Quaternary estuarine deposits which are brackish to saline. These are may be seasonally inundated with fresh water, but dry out completely before the next season's rain. (BVG1M: 34c)

Vegetation communities in this regional ecosystem include:
11.1.3a: Melaleuca spp. and/or Eucalyptus tereticornis open woodland to woodland. Mangrove trees and shrubs are often present, and there are sometimes scattered shrubs of Myoporum acuminatum. There is usually a dense ground layer of Sporobolus virginicus, with other species including Vincetoxicum carnosum, Fimbristylis ferruginea, Cyperus scariosus, C. polystachyos, Gymnanthera oblonga, Acrostichum speciosum and Centella asiatica. Occurs on transition zone between tidally inundated areas and areas under fresh water influence. Palustrine wetland (e.g. vegetated swamp). (BVG1M: 22a)
Supplementary description Christian et al. (1953), Littoral; Forster and Barton (1995), Waratah; Cumming (2000); Bean (1992)
Protected areas Bolger Bay CP, Magnetic Island NP
Special values Provides wetland habitat for waders and a range of waterfowl.
Fire management guidelines SEASON: Various. INTENSITY: Low. INTERVAL: Typically > every 4 years. Rubbervine or other weed control may require two fires within 2 or 3 years which should be followed by an absence of fire for > 5 years. STRATEGY: Do not actively target for burning, except for the control of rubbervine. Can tolerate being burnt when implementing fires in adjacent vegetation. ISSUES: Saltpan species, e.g. Sporobolus virginicus, Tecticornia indica and Suaeda australis can tolerate occasional fires, but do not require fire for recruitment. Tecticornia indica and Suaeda australis, should have long-term persistence. Only burn if required as part of burning adjacent vegetation or for rubbervine control.
Comments 11.1.3: Includes areas that may be subject to freshwater influence. Usually associated with RE 11.1.1 or RE 11.1.2, and always in close proximity to these ecosystems. In some instances, can be difficult to determine the boundary between tidal saltmarshes and freshwater swamps (Bruinsma 2000). Merges into freshwater sedgelands (11.3.27d). Heavily invaded by weeds in some districts with *Stachytarpheta jamaicensis, *Mesosphaerum suaveolens, *Sida spp. and *Cynodon dactylon var. dactylon prominent in some localities e.g. Alma Beach near Ayr. Threatened by urban development along coastal lowlands. Occurs along coastal parts in the north and south of the bioregion. 11.1.3a: Over storey tree species often dead or dying back due to salt water inundation.

1 Estimated extent is from version 10 pre-clearing and 2015 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 in version 10 RE mapping. It is included in the regional ecosystem description database because the RE code may appear in older versions of RE mapping and regulation.

Licence
Creative Commons Attribution 4.0 International (CC BY 4.0)
Last updated
10 April 2017
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