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20. Mangrove Island

This information has been developed from the publication:
  • Sites of Geological and Geomorphological Significance in the South Gippsland Marine and Coastal Parks (1989) Neville Rosengren.
    Geological heritage sites, including sites of geomorphological interest and volcanic heritage sites, are under regular revision by the Geological Society of Australia, especially in the assessment of significance and values. Reference should be made to the most recent reports. See the     Earth Science Heritage (external link) section of the Geological Society of Australia website for details of geological heritage reports, and a bibliography.

Location415153. Two km south of Toora Beach.

Access:
Boat access only at high tide from Lawsons Gutter off Toora Channel.

Significant Features:
The site encloses Mangrove Island and an areas of the surrounding inter-tidal flat. The island is surrounded by and almost covered with dense, apparently even-aged strands of mangrove most only 1 m high forming a continuous low level canopy. There is a small area of slat marsh and a large number of open ponds surrounded by mangrove. A pool-and-channel tidal drainage pattern has developed around the island below mid-tide level. Several large shell banks have stranded on the tidal flats south of Mangrove Island.

Significance Level:
State. Teh island is an example of the early stages of marsh island formation. Unlike other marsh islands in Corner Inlet, the mangrove fringe is intact although some recession of mangrove edges is beginning.

Management Issues:
Considerable damage to the mangroves is caused by walking across the island. Landing and traversing should be excluded and the island placed in a special management zones.

Research & Monitoring Requirements:
Base line transects should be established to monitor change in the island configuration. Aerial photography can be used to determine the development of the tidal drainage pattern.

Public Interpretation Possibilities:
No applicable. The island is too sensitive to use as a public site.

Main References:
Vertical aerial photographs.

Sites of Geological & Geomorphological Significance - Figure 49
Sites 17 (Agnes River), 18 (Toora Island), 19 (Inter-tidal flats) and 20 (Mangrove Island)
Image: Marine and Coastal Parks Sites of Significance
Dense, even-height stand of mangroves, Mangrove Island

Image: Marine and Coastal Parks Sites of Significance
Pond in mangroves, Mangrove Island
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