Southern Yorke Peninsula - community action planning

The southern Yorke Peninsula community action plan project addresses critical conservation issues in an area of approximately 353,000 hectares from Dhilba Guuranda-Innes National Park on the south‐western tip of the peninsula to near Curramulka on central Yorke Peninsula. The boundary also extends to the Point Pearce community and Aboriginal Lands near Port Victoria in the north‐west.

Regional landforms include significant areas of semi‐saline wetlands in low‐lying areas near Warooka and Yorketown, high‐energy rugged coastlines in the south‐west, low‐energy cliffs and dunes on the east and upper west coast and undulating to low hilly plains throughout inland areas. No part of the project area is more than 20km from the coast.

Native vegetation

The south‐west of the peninsula contains extensive areas of sub‐coastal mallee dominated by coastal white mallee (Eucalyptus diversifolia +/‐ Eucalyptus rugosa), interspersed with woodland formations of mallee box (Eucalyptus porosa), drooping sheoak (Allocasuarina verticillata) and dryland tea‐tree (Melaleuca lanceolata). Native vegetation cover is relatively high in the south‐west with the Innes Interim Biogeographic Regionalisation for Australia (IBRA) Association boundary, retaining approximately 52% native vegetation cover.

Typical plant communities found along the high energy coasts are low shrub lands on exposed rocky cliffs, dominated by pale turpentine bush (Beyeria lechenaultii), coast velvet‐bush (Lasiopetalum discolor), cushion bush (Leucophyta brownii), cushion fan‐flower (Scaevola crassifolia). Coastal dune shrub lands dominated by coast daisy‐bush (Olearia axillaris), coastal beard‐heath ( Leucopogon parviflorus), wattle species (Acacia spp) and common boobialla (Myoporum insulare). Rear dunes generally support open woodlands dominated by drooping sheoak (Allocasuarina verticillata) and dryland tea‐tree (Melaleuca lanceolata) over coastal shrubs.

Inland wetlands and saline lakes are dominated by samphire shrublands or swamp paperbark forests (Melaleuca halmaturorum), occasionally with cutting grass (Gahnia filum) sedgelands. Native vegetation cover is largely absent from the wetland systems to the east and north of the Peesey system.

The ‘leg’ of the peninsula contains highly fragmented vegetation remnants including Mallee Box (Eucalyptus porosa), drooping sheoak (Allocasuarina verticillata) and dryland tea‐tree (Melaleuca lanceolata) woodlands. Fragmented mallee associations include ridge‐fruit mallee (Eucalyptus incrassata) with a shrubby understorey on deep sands, and mixed mallee associations on loams and shallow limestone soils. The ‘leg’ of the peninsula is heavily cleared with the Southern Yorke Interim Biogeographic Regionalisation for Australia (IBRA) Sub‐region, containing only 18% native vegetation cover.

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