Eyre Yorke Block

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The IBRA regions, with Eyre Yorke Block in red

The Eyre Yorke Block is an interim Australian bioregion and a World Wildlife Fund ecoregion covering the Eyre and Yorke Peninsulas around the Spencer Gulf on the coast of South Australia.[1][2][3]

Location and description[edit]

These peninsulas consist of hilly country originally covered in eucalyptus woodland. However this is good soil for farming and the woodland has mostly been cleared for agriculture now. This coast has a temperate climate with a wet winter (300mm to 600mm of rainfall per year).

Flora[edit]

The original vegetation of these low hills was woodland of short trees with a shrubby undergrowth. The original woodland consisted mainly of a tea tree Melaleuca lanceolata and mallee box (Eucalyptus porosa), a mallee eucalyptus. The flora of the two peninsulas does differ with that of the Eyre Peninsula having similarities with areas further west as well as number of endemic species, while the Yorke Peninsula has plants typical of areas to the east.

Fauna[edit]

Mammals of the region include the Eastern Grey Kangaroo and the Southern Hairy-nosed Wombat, although many more (such as the Tammar Wallaby have become extinct on the two peninsulas since they have been cleared for farmland. Birds include the emu.

Threats and preservation[edit]

This is a heavily populated region and most of the area has been cleared for farmland resulting in reduced populations and local extinction of much wildlife, especially on Yorke Peninsula. However clearance has mostly ceased now and the northern areas of Eyre Peninsula in particular still have large areas of mallee woodland while the coastal dunes remain mostly unspoilt also. Weeds, fertiliser and herbicide runoff are still threatening habitats. Protected areas include Innes National Park on Yorke Peninsula.

References[edit]

Further reading[edit]

  • Thackway, R and I D Cresswell (1995) An interim biogeographic regionalisation for Australia : a framework for setting priorities in the National Reserves System Cooperative Program Version 4.0 Canberra : Australian Nature Conservation Agency, Reserve Systems Unit, 1995. ISBN 0-642-21371-2