Freshwater wetlands on coastal floodplains - profileScientific name: Freshwater wetlands on coastal floodplains of the NSW North Coast, Sydney Basin and South East Corner bioregions Conservation status in NSW: Endangered Ecological Community DescriptionAssociated with coastal areas subject to periodic flooding and in which standing fresh water persists for at least part of the year in most years. Typically occurs on silts, muds or humic loams in low-lying parts of floodplains, alluvial flats, depressions, drainage lines, backswamps, lagoons and lakes but may also occur in backbarrier landforms where floodplains adjoin coastal sandplains.
Generally occur below 20 m elevation on level areas. They are dominated by herbaceous plants and have very few woody species. The structure and composition of the community varies both spatially and temporally depending on the water regime:
Those that lack standing water most of the time are usually dominated by dense grassland or sedgeland vegetation, often forming a turf less than 0.5 metre tall and dominated by amphibious plants including Paspalum distichum (water couch), Leersia hexandra (swamp rice-grass), Pseudoraphis spinescens (mud grass) and Carex appressa (tussock sedge).
Where they are subject to regular inundation and drying the vegetation may include large emergent sedges over 1 metre tall, such as Baumea articulata, Eleocharis equisetina and Lepironia articulata, as well as emergent or floating herbs such as Hydrocharis dubia (frogbit), Philydrum lanuginosum (frogsmouth), Ludwigia peploides subsp. montevidensis (water primrose), Marsilea mutica (nardoo) and Myriophyllum spp. (milfoils).
As standing water becomes deeper or more permanent, amphibious and emergent plants become less abundant, while floating and submerged aquatic herbs become more abundant. These latter species include Azolla filiculoides var. rubra, Ceratophyllum demersum (hornwort), Hydrilla verticillata (water thyme), Lemna spp. (duckweeds), Nymphaea gigantea (giant waterlily), Nymphoides indica (water snowflake), Ottelia ovalifolia (swamp lily) and Potamageton spp. (pondweeds). The threatened aquatic plants, Aldrovanda vesiculosa and Najas marina, also occur within this community.
For a comprehensive list of species that characterize the community open the Scientific Determination link in the top right box. Location and habitatDistribution Known from along the majority of the NSW coast. However, it is distinct from Sydney Freshwater Wetlands which are associated with sandplains in the Sydney Basin bioregion.
Extensively cleared and modified. In the 1990s the extent remaining were: 3% in the NSW North Coast bioregion, 66% in the lower Hunter – Central coast region, 40% on the Cumberland Plain, 70% in the Sydney – South Coast region, and 30% in the Eden region.
There is less than 150 ha remaining on the Tweed lowlands (estimate in 1985); about 10,600 ha on the lower Clarence floodplain (in 1982); about 11,200 ha on the lower Macleay floodplain (in 1983); about 3,500 ha in the lower Hunter – Central Hunter region (in 1990s); less than 2,700 ha on the NSW south coast from Sydney to Moruya (in the mid 1990s), including about 660 ha on the Cumberland Plain (in 1998) and about 100 ha on the Illawarra Plain (in 2001); and less than 1000 ha in the Eden region (in 1990).
Poorly reserved, known to occur in Ukerebagh, Tuckean, Tabbimoble Swamp, Hexham Swamp, Pambalong and Pitt Town Nature Reserves and Bungawalbin, Scheyville and Seven Mile Beach National Parks. Regional information This species is found in the following catchment management authority regions. Click on a region name to see more details about the distribution, vegetation types and habitat preference of the species in that region. Threats- Land clearing
- Continuing fragmentation and degradation
- Flood mitigation and drainage works
- Filling associated with urban and industrial development
- Pollution and eutrophication from urban and agricultural runoff
- Weed invasion
- Overgrazing, trampling by livestock
- Soil disturbance by pigs
- Activation of acid sulfate soils
- Dumping of landfill, rubbish and garden refuse
- Native fauna is threatened by predation, particularly by mosquito fish and cane toads
- Anthropogenic climate change
Recovery strategiesPriority actions are the specific, practical things that must be done to recover a threatened species, population or ecological community. The Department of Environment and Conservation has identified 13 priority actions to help recover the Freshwater wetlands on coastal floodplains in New South Wales. What needs to be done to recover this species?- Instigate enforcement and education campaigns to reduce dumping.
- Instigate pig control programs.
- Install stormwater control mechanisms to prevent off-site impacts from adjacent development.
- Control access of cattle to wetlands by installing fencing.
- Undertake weed control as required using removal methods that will not damage the community.
- Protect and actively manage wetlands through conservation mechanisms such as covenanting and the preparation/implementation of site-specific vegetation management plans.
- Restore natural drainage conditions.
Detailed ReferencesBelow is a list of references relating to this ecological community. You can filter the list by the features or publication type you require. | Reference Details | Features |
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| Adam, P. (1992) Wetlands and Wetland Boundaries; Problems, expectations, perceptions and reality. Wetlands (Australia), Vol , pp. 60-67. | |
| Adam, P. and Stricker, J. (1993) Wetlands of the Sydney Region. Nature Conservation Council, 42 pgs + App.. | |
| Bell, S.A.J. (2002) The natural vegetation of the Wyong Local Government Area, Central Coast, New South Wales: Technical Report. Unpublished Final Report to Wyong Shire Council, Eastcoast Flora Survey, 197 pgs. | |
| Bell, S.A.J. (2004) The natural vegetation of the Gosford Local Government Area, Central Coast, New South Wales: Technical Report. Unpublished Final Report to Gosford City Council, Eastcoast Flora Survey, 131 pgs. | |
| Bellingen Shire Council (2006) Coastal Vegetation of the Bellingen Local Government Area. A report by Flametree Ecological Consultants for Bellingen Shire Council. Bellingen Shire Council, 88 pgs. | |
| Benson, D.H. (1986) The native vegetation of the Gosford – Lake Macquarie 1:100 000 Mapsheets. Cunninghamia, Vol. 1, pp. 467-490.. | |
| Benson, D.H. and Howell, J. (1990) Taken for Granted: The Bushland of Sydney and Its Suburbs. Kangaroo Press, Sydney., 160 pgs + illus bibliog index. | |
| Benson, D.H. and Howell, J. (2000) Sydney’s Bushland — More than Meets the Eye. Royal Botanic Gardens, Sydney.. | |
| Benson, D.H. and Howell, J. (1993) A strategy for the rehabilitation of the riparian vegetation of the Hawkesbury-Nepean River. Royal Botanic Gardens, Sydney. | |
| Benson, D.H. and Howell, J. (1994) Natural vegetation of the Sydney 1:100000 Mapsheet. Cunninghamia, Vol. 3 (4), pp. 679-789. | |
| Beukers, P. and Miles, J. (In prep) Revision of vegetation mapping for the NSW Far South Coast. DECC Merimbula. NSW Dept. of Environment and Climate Change (Parks and Wildlife Group), Merimbula. | |
| Boulton, A.J. and Brock, M.A. (1999) Australian freshwater wetlands: processes and management. Gleneagles Publishing, Glen Osmond, 300 pgs + illus, tables, bibliog, glossary and index . | |
| Brooker, M. and Kleinig, D. (1990) Field Guide to Eucalypts of South-eastern NSW. Vol 1 and 2. Inkata Press, Melbourne.. | |
| Chafer, C. (1997) Biodiversity in the Illawarra Catchments: an inventory. Illawarra Catchment Management Committee, 124 pgs + app. | |
| DEC (2004) North East NSW Field Key to Forest Ecosystems. Natural Resource Management Field Assessment Guidelines. DEC, NE Branch Coffs Harbour.. | |
| ESC (2007) Endangered Ecological
Communities Survey and
Mapping in Eurobodalla Shire. A report prepared by NGH Environmental for Eurobodalla Shire Council, 40 pgs. | |
| Fisher, M., Body, M. and Gill, J. (1996) Vegetation Idenification and Classification of the Coffs Harbour City Council LGA. North East Vegetation Surveys, 75 pgs. | |
| Gellie, N. (2005) Native Vegetation of the Southern Forests: South-east Highlands, Australian Alps, South-west Slopes, and SE Corner bioregions. Cunninghamia, Vol 9 (2) pp. 219-253. | |
| Gilmore, P. (2006) Vegetation Communities of the Central Coast Region of NSW. In: McCauley, A. etal (2006) Vegetation of Regional Significance on the NSW Central Coast. HCR CMA and Hunter Councils Inc. NSW., 240 pgs. | |
| Griffith, S. (2005) NSW North Coast Wetland Vegetation Communities. A preliminary literature review. NSW Dept. of Environment and Conservation., 82 pgs. | |
| Griffith, S.J., Bale C, Adam, P., and Wilson, R. (2003) Wallum and related vegetation on the NSW North Coast: description and phytosociological analysis. Cunninghamia, Vol. 8, pp. 202-252.. | |
| Harden, G. (ed) (1999-2002) Flora of NSW. NSW University Press, Vol. 1-4. | |
| Harty, C. (2001) A planning methodology for protecting saltmarsh, mangrove and seagrass wetlands in NSW and Victoria. Wetlands (Australia), Vol 19 (2), pp. 103-109. | |
| Hnatuik, R.J., Thackway, R. and Walker, J. (2003) Vegetation - Guidelines for site-based survey. Australian Bureau of Rural Sciences, 111pgs. | |
| House, S (2003) Lower Hunter & Central Coast Regional Biodiversity Conservation Strategy, Technical Report, Digital Aerial Photo Interpretation & Updated Extant Vegetation Community Map. Lower Hunter & Central Coast Regional Environmental Management Strategy, Callaghan, NSW.. | |
| Howell, J. and Benson, D. (2005) Seasonal and year-to-year changes in vegetation of freshwater wetlands on the Hawkesbury-Nepean Floodplains. Wetlands (Australia), Vol 23(1), pp 20-36. | |
| Howell, J., McDougall, L. and Benson, D. (1995) Riverside Plants of the Hawkesbury-Nepean. Hawkesbury Nepean Catchment Management Trust and Royal Botanic Gardens, Sydney., 62 pgs. | |
| James, T. McDougall, L. and Benson, D.H. (1999) Rare Bushland Plants of Western Sydney, second edition. Royal Botanic Gardens, Sydney.. | |
| Keith, D.A. (2004) Ocean Shores to Desert Dunes - The native vegetation of NSW and the ACT. Dept. of Environment and Conservation (NSW), 353 pgs. | |
| Keith, D.A. (1996) Fire-driven mechanisms of extinction in vascular plants: a review of empirical and theoretical evidence in Australian vegetation. Proceedings of the Linnean Society of New South Wales., Vol. 116, pp. 37-78.. | |
| Keith, D.A. and Bedward, M. (1999) Vegetation of the South East Forests region, Eden, NSW (Eden CRA). Cunninghamia, Vol 6, pp 1-218. | |
| Keith, D.A. and Scott, J. (2005) Native Vegetation of Coastal Floodplains. Pacific Conservation Biology, Vol 11, pp 81-104. | |
| Kendall and Kendall Ecological Consultants (2003) Nambucca Catchment Vegetation Survey. Report prepared for Nambucca Vegetation Sub-committee, 155 pgs. | |
| Kingsford, R.T., Brandis, K., Thomas, R.F., Crighton, P., Knowles, E. and Gale, E. (2004) Classifying landform at broad spatial scales: the distribution and conservation of wetlands in NSW, Australia. Marine and Freshwater Research, Vol 55, pp. 17-31. | |
| Lovett, S. and Price, P. (eds) (2007) Principles for riparian lands management. Land and Water Australia, Canberra., 200 pgs. | |
| McCauley, A., DeVries, R., Elith, J. and Gilmore, P. (2006) Vegetation of Regional Significance on the NSW Central Coast. Hunter Central Rivers Catchment Management Authority and Hunter Councils Inc. NSW., 308 pgs + appendices. | |
| McDonald, R.C., Isbell, R.F., Speight, J.G., Walker, J. and Hopkins, M.S. (1990) Australian soil and land survey. Field handbook. Second edition. Inkata Press, Melbourne., pp. 9-57. | |
| McRae, R.H.D. & Cooper, M.G. (1985) Vegetation of the Merriwa area, New South Wales. Cunninghamia, Vol. 1, pp. 351-369.. | |
| Miles, J. (2007) Recognition and Management of Endangered Ecological Communities in the South East Corner of NSW. Southern Rivers Catchment Management Authority, 60 pgs. | |
| Mills, K. (2003) The natural vegetation in the municipality of Kiama, NSW. A report prepared by Kevin Mills and Associates for Kiama Municipal Council, 49 pgs. | |
| NCC (1999) Towards an Illawarra Regional Vegetation Management Plan. Nature Conservation Council of NSW, Sydney.. | |
| NPWS (2002) Native vegetation of the Illawarra Escarpment and Coastal Plain. NSW National Parks and Wildlife Service, Sydney, 242 pgs. | |
| NPWS (1999) Forest Ecosystem Classification and mapping for upper and lower north east CRA regions. CRA Unit, Northern Zone, National Parks and Wildlife Service, Coffs Harbour., 36 pgs + appendices. | |
| NPWS (2000) Forest ecosystem classification and mapping for the Hunter Sub-Region in the Lower North East Comprehensive Regional Assessment. CRA Unit, Sydney Zone, National Parks and Wildlife Service.. | |
| Pressey, R.L. (1981) A review of Literature on the Floodplain Welands of Coastal NSW. NSW National Parks and Wildlife Service, Sydney. | |
| Pressey, R.L. (1987) A Survey of Wetlands on the Lower Clarence Floodplain, NSW. NSW National Parks and Wildlife Service, Sydney, 43 pgs. | |
| Pressey, R.L. (1987) A Survey of Wetlands on the Lower Hunter Floodplain, NSW. NSW National Parks and Wildlife Service, Sydney, 52 pgs. | |
| Pressey, R.L. (1987) A Survey of Wetlands on the Lower Macleay Floodplain, NSW. NSW National Parks and Wildlife Service, Sydney, 52 pgs. | |
| Pressey, R.L. and Griffith, S.J. (1987) Coastal wetlands and associated communities in Tweed Shire, Northern NSW. NSW National Parks and Wildlife Service, Sydney, 22 pgs + maps and appendices. | |
| Pressey, R.L. and Griffith, S.J. (1992) Vegetation of the coastal lowlands of Tweed shire, northern New South Wales, species and conservation. Proceedings of the Linnean Society of NSW , Vol. 113, pp. 203-243.. | |
| Robinson, L (2003) Field guide to native plants of Sydney revised 3rd edition. Kangaroo Press, 448 pgs. | |
| Smith, P. and Smith, J. (1990) Hornsby Shire bushland survey. Report and maps prepared for Hornsby Shire Council. P & J Smith Ecological Consultants, Blaxland.. | |
| Smith, P. and Smith, J. (2006) Native vegetation communities of Hornsby Shire. Report and maps prepared for Hornsby Shire Council. P & J Smith Ecological Consultants, Blaxland., 46 pgs. | |
| Speight, J.G. (1990) Landform. In: 'Australian soil and land survey. Field handbook' Second edition (Eds. RC McDonald, RF Isbell, JG Speight, J, Walker, MS Hopkins). Inkata Press, Melbourne., pp 9-57. | |
| Straw, P. (1999) Hunter River Estuary Wader Habitat Investigation. Unpublished Report to National Parks and Wildlife Service, Sydney. | |
| Straw, P. (2000) Hunter River Estuary Wader Habitat Investigation Stage 2. Unpublished Report to National Parks and Wildlife Service, Sydney. | |
| Telfor, D. and Kendall, P. (2006) Native Vegetation Mapping and Endangered Ecological Community Mapping, Kempsey LGA east. Report to Kempsey Shire Council, 40 pgs. | |
| Thackway, R., Creswell, I.D. (eds) (1995) An interim biogeographic regionalisation of Australia: a framework for establishing the national system of reserves. Australian Nature Conservation Agency: Canberra.. | |
| Thackway, R., Neldner, J. and Bolton, M.
(2003) Chapter 7. Vegetation - Guidelines for Conducting Surveys. Australian Bureau of Rural Sciences, 35 pgs. | |
| Thomas, V., Gellie, N., & Harrison, T. (2000) Forest Ecosystem Classification and Mapping for the Southern Comprehensive Regional Assessment. NSW National Parks and Wildlife Service, Queanbeyan.. | |
| Tindall, D., Pennay, C., Tozer, M.G., Turner, K., & Keith, D.A. (2004) DRAFT Native vegetation map report series No. 4. Araluen, Batemans Bay, Braidwood, Burragorang, Goulburn, Jervis Bay, Katoomba, Kiama, Moss Vale, Penrith, Port Hacking, Sydney, Taralga, Ulladulla, Wollongong (Priority 5 Mapping Area - P5MA). NSW Dept. of Environment and Climate Change and NSW Dept. of Infrastructure, Planning and Natural Resources.. | |
| Tozer, M.G. (2003) The native vegetation of the Cumberland Plain, Western Sydney: systematic classification and field identification of communities. Cunninghamia, Vol 8 (1), pp. 1-75. | |
| Tozer, M.G., Turner, K., Simpson, C., Keith, D.A., Beukers, P., MacKenzie, B., Tindall, D. & Pennay, C. (2006) Native vegetation of south east NSW: a revised classification and map for the coast and eastern tablelands. V1.0. NSW Dept. of Environment and Climate Change and NSW Dept. of Infrastructure, Planning and Natrual Resources.. | |
| Troedson, A., Hashimoto, T.R., Jaworksa, J., Malloch, K., Cain, L. (2004) New South Wales Coastal Quaternary Geology. In: NSW Coastal Quaternary Geology Data Package (on CD-Rom), Troesdson, A., Hashimoto, T.R. (eds). NSW Dept. of Primary Industries, Mineral Resources, Geological Survey of NSW, Maitland., 108 pgs. | |
| WetlandCare Australia (2006) Sustainable Wetlands on NSW Coastal Landscapes. Northern Rivers, Catchment Management Authority region. WetlandCare Australia, Ballina, NSW., CD-rom. | |
| WetlandCare Australia (2006) Sustainable Wetlands on NSW Coastal Landscapes. Hunter Central Rivers, Catchment Management Authority region. WetlandCare Australia, Ballina, NSW., CD-rom. | |
| Williams, R.J. and Watford, F.A. (1996) An inventory of impediments to tidal flow in NSW estuarine fish habitats. Wetlands (Australia), Vol. 15, pp. 44-54. | |
| Winning, Geoffrey Bruce (2006) Vegetation changes in a large estuarine wetland subsequent to construction of floodgates: Hexham Swamp in the Lower Hunter Valley, New South Wales. Thesis (Masters). Australian Catholic University., 138 pgs. | |
| |  Freshwater wetlands on coastal floodplains Image: Michael Murphy © Michael Murphy
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