Endangered populations in NSW: Posidonia australis
Factsheet Number: Edition: Released/reviewed:
Posidonia australis, also commonly referred to as strapweed, is a type of seagrass that is endemic (native) to the temperate marine and estuarine waters of the southern half of Australia. In NSW, Posidonia australis is found within the protected waters of coastal bays and estuaries and coastal lakes that are subject to frequent tidal flushing.
This seagrass species has been impacted by a range of human activities, particularly in six estuaries within the Sydney and Central Coast region. Populations of Posidonia australis in Port Hacking, Botany Bay, Sydney Harbour, Pittwater, Brisbane Waters and Lake Macquarie have suffered such a large reduction in abundance and geographic distribution that they have been listed as endangered populations under the threatened species schedules of the NSW Fisheries Management Act 1994.
This loss is likely to have had significant historical and ongoing impacts on marine and estuarine biodiversity and productivity as Posidonia australis plays an important role in providing nursery areas, feeding grounds and shelter for many aquatic animals.
Topics include:
- Description
- Habitat and ecology
- Why is Posidonia australis important?
- Why are populations of Posidonia australis endangered?
- Conservation and recovery actions
- Legal implications
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