Water

Directory of Important Wetlands

Directory of Important Wetlands in Australia - Information sheet

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Illawong Swamp - SA036

Level of importance: National - Directory
Location: 35 degrees 34' 56" S, 138 degrees 19' 11" E; located on the southern Fleurieu Peninsula, 4 km SW of Parawa. The swamp falls within a ForestrySA reserve located between Illawong Rd. and Tunkalilla Rd. known as Martins Block and also contains Waitpinga Conservation Park.
Biogeographic region: Kanmantoo
Shire: Yankalilla
Area: 67.5 ha.
Elevation: 270 m ASL.
Other listed wetlands in same aggregation: None.
Wetland type: B15, B9
Criteria for inclusion: 1, 2, 5,
Site description:
Fleurieu Peninsula Swamp in pristine condition. The site contains Closed Wet Reedbed, Closed Wet Sedgeland and Tall Closed Wet Shrubland formations. The swamp is partly included in Waitpinga Conservation Park. Some disturbance from drainage of upstream swamp (S2177) has occurred.
Physical features:
Spring fed Swamp on a rubbly waste mantle of ferruginous gibbers, sandstone and claystone in dark red-brown silty sand. Mean annual rainfall is 800 mm, mostly falling in winter.
Hydrological features:
Water Course: Tunkalilla Creek. Water source: Groundwater and local rainfall - Permanent Palustrine Spring that contains water throughout the year although the level may vary. Water depth (when full): maximum 0.5 m, average 0.2 m.
Ecological features:
Ecological role: Provides habitat for the nationally endangered flora and fauna species. Plant structural formation: Swampy heathland.
Significance:
Fleurieu Peninsula Swamp in pristine condition. Fleurieu Peninsula Swamps are a threatened ecological community and the wetland supports the a number of threatened species including the Mount Lofty Ranges Southern Emu-wren Stipiturus malachurus intermedius which is endangered at the state and national level (NPWS Act 1972; EPBC Act 1999).
Notable flora:
Threatened species: Amphibromus archeri (Sr), Anogramma leptophylla (Sr), Baumea acuta (Sr), Baumea gunnii (Sr), Boronia parviflora
(Sr), Cryptostylis subulata (Sv), Danthonia tenuior (Sr), Drosera binata (Sr), Euphrasia collina ssp. osbornii (Ne, Se), Gleichenia microphylla (Sr), Gonocarpus micranthus ssp. Micranthus (Sr), Hydrilla verticillata (Sr), Hypolepis rugosula (Sr), Leucopogon hirsutus (Sr), Myriophyllum amphibium (Sr), Phylloglossum drummondii (Sr), Prasophyllum frenchii (Ne, Se), Pultenaea scabra (Sr), Schoenus laevigatus (Sr), Schoenus lepidosperma ssp. lepidosperma (Sr), Sprengelia incarnata (Sr), Viminaria juncea (Sr), Xanthosia tasmanica (Sr), Xyris operculata (Sr).
Composition: overall dominant plants are; Leptospermum lanigerum, L. continentale, Baumea rubiginosa, B. tetragona, Phragmites australis, Gahnia sieberiana, Pteridium esculentum, Gleichenia microphylla and Blechnum minus.
Notable fauna:
Threatened species: Beautiful Firetail (Sr), Chestnut-rumped Heathwren (Sv), Mount Lofty Ranges Southern Emu-wren (Ne, Se), Osprey (Sr), Painted Button-quail (Sv), Peregrine Falcon (Sr), White-bellied Sea-Eagle (Sv), Yellow-bellied Water Skink (Sr), Yellow-tailed Black-cockatoo (Sv).
Other Fauna:
Social and Cultural values:
Unknown
Land tenure:
Onsite: Private and Public. Surrounding: Public and Private
Current land use:
Onsite: Nature conservation (Waitpinga Conservation Park) and moderate to heavy stock grazing. Surrounding: Forestry (pine) and Grazing (sheep).
Disturbance or threat:
Past/present: Some weed problems including blackberry, gorse and pine forest encroachment. Moderate Phytophthora cinnamomi infection. Altered (decreased) water regime.
Potential: Over-grazing, cat and fox predation, damage caused by vehicle tracks.
Conservation measures taken:
Waitpinga Conservation Park protects an area of Coral Fern.
Management authority and jurisdiction:
Private (freehold), Forestry SA and National Parks and Wildlife Service SA (Department for Environment and Heritage).
References:
See SA Reference List
Compiler & date:
T. Littlely & J. Cutten, Conservation Council of South Australian for ANCA (Endangered Species Program), 1995. Updated (including name change) by G Anderson, SA Department for Environment and Heritage 30/0505.
Drainage:  
AWRC Division: South Australian Gulf
AWRC Region:
AWRC Basin:
Catchment:
Sub-catchment: