The Southport Dunes are the largest dune landform in the region, being nearly 1.3km long, 250 m at its widest, and rising to 20 m. The vegetation overall is generally a shrubland to open shrubland, with dominant overstorey comprising a shrubland to open shrubland. Weeds are generally scattered and low in density apart from large patches of Pyp Grass (*Ehrharta villosa) on steep dunes in the north eastern corner of the site, and Marram Grass (*Ammophila arenaria) along the foredunes, on the steep dune faces on the eastern side of the dunes (facing the Onkaparinga Estuary) and in the low dunes to the south of the Southport Surf Lifesaving Club. Eradication of these highly invasive grass species has been undertaken over 13 years with total eradication as the target. Revegetation with native species, especially the native Rolling Spinifex (Spinifex hirsutus), has been critical to the project success as these weedy grasses are currently performing an important stability function in holding the sandy soil. Whilst increasing stability, the weedy grasses, in particular Marram Grass (Ammophila arenaria) and Sea Wheat Grass (Thinopyrum junceiforme), change the dune structure and function impacting on habitat value, resilience and response to disturbance events and ability of native plant species to regnerate.

Dune replanting or construction

Method: Rehabilitation

Rehabilitation - method: Weed removal