aubin-grove
Aubin Grove, conservation category
sumpland - Photo © M Rogers/Parks and Wildlife

Western Australia is home to many different varieties of wetlands, from tidal mangroves and billabongs, to salt lakes and fresh water springs.

No one government agency is solely responsible for managing wetlands in WA. The Department of Parks and Wildlife is responsible for managing Ramsar wetlands and wetlands on CALM Act land. It is also involved in implementing pdfwetlands policy, providing advice to decision makers on the potential impacts of developments on wetlands and conducting wetland research and monitoring.

The Department of Water is the lead agency for managing most waterways (where water flows in a channel) and estuaries (influenced by tides) and associated policy.

 

 

What are wetlands?

Wetlands are areas that are permanently, seasonally or intermittently waterlogged or inundated with water.

  • This water can be fresh or salty, flowing or still.
  • Some wetlands occur naturally. Others are artificially made, such as a dam or ornamental lake.

Lakes are an easily identified type of wetland. These permanently inundated basins are well documented world-wide and notable in our dry landscapes.

Less familiar wetland types include sumplands, damplands, playas, palusplains, barlkarras, paluslopes and palusmonts.

Wetland types (adapted from Semeniuk & Semeniuk)

 

Basin

Flat

Channel

Slope

Highland

Permanently inundated

Lake

 

River

 

 

Seasonally inundated

Sumpland

Floodplain

Creek

 

 

Intermittent inundation

Playa

Barlkarra

Wadi

 

 

Seasonally waterlogged

Dampland

Palusplain

Trough

Paluslope

Palusmont

seasonal-wetland-and-threatened-ecological-community-photo-m.-bastow-sml
A seasonally waterlogged wetland - 
Photo © Parks and Wildlife

Waterlogged wetlands are being lost at a faster rate than other wetland types because since European settlement they have tended to be less valued than other wetlands. They have also posed less of a constraint to development or use because they hold less water.

 

Why are wetlands important?

Although Australia is the driest inhabited continent, it has a large number of the world’s internationally recognised wetlands.

  • Australian wetlands are critical to the survival of birds that migrate across the globe each season, and Australia is responsible for these birds under international treaties.
    • Nearly 20 per cent of Australia’s bird species depend on wetlands, many on different wetlands for different parts of their life cycle.
  • Wetlands provide a home for other animals such as fish, frogs, tortoises and invertebrates, and many types of plants.
    • They provide vital habitat for threatened plants and animals, such as the western swamp tortoise (Pseudemydura umbrina) found naturally in only two wetlands in the state's south west.
    • They provide nursery areas for fish, and breeding grounds for wildlife, particularly waterbirds.
  • Wetlands help keep water clean and healthy by filtering out pollutants such as sediments, nutrients and pathogens.
  • Wetlands help reduce the severity of floods, while providing refuges for wildlife during drought.
  • Many are great spots for recreational activities such as camping, swimming, boating, fishing, bushwalking and birdwatching.
  • Many wetlands are culturally significant, for example gnammas.
  • They provide educational and scientific research sites for the community and academic institutions.
tortoise-lake-mclarty
Tortoise at Lake McLarty
Photo © A Beard

 

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Title Modified Date
Natural Diversity Recovery Catchment Program Tuesday, 07 October 2014 08:50