Eyre Yorke Block

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

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

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

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

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

↑ Environment Australia. "Revision of the Interim Biogeographic Regionalisation for Australia (IBRA) and Development of Version 5.1 - Summary Report". Department of the Environment and Water Resources, Australian Government. Archived from the original on 2006-09-05. Retrieved 2007-01-31.
↑ IBRA Version 6.1 data
↑ "Eyre and York mallee". Terrestrial Ecoregions. World Wildlife Fund. Retrieved 24 July 2012.

Interim Biogeographic Regionalisation for Australia (IBRA)

Arnhem Coast Arnhem Plateau Australian Alps Avon Wheatbelt Ben Lomond Brigalow Belt North Brigalow Belt South Broken Hill Complex Burt Plain Cape York Peninsula Carnarvon Central Arnhem Central Kimberley Central Mackay Coast Central Ranges Channel Country Cobar Peneplain Coolgardie Coral Sea Daly Basin Dampierland Darling Riverine Plains Darwin Coastal Davenport Murchison Ranges Desert Uplands Einasleigh Uplands Esperance Plains Eyre Yorke Block Finke Flinders Lofty Block Furneaux Gascoyne Gawler Geraldton Sandplains Gibson Desert Great Sandy Desert Great Victoria Desert Gulf Coastal Gulf Fall and Uplands Gulf Plains Hampton Indian Tropical Islands Jarrah Forest Kanmantoo King Little Sandy Desert MacDonnell Ranges Mallee Mitchell Grass Downs Mount Isa Inlier Mulga Lands Murchison Murray Darling Depression Nandewar Naracoorte Coastal Plain New England Tablelands Northern Kimberley New South Wales North Coast New South Wales South Western Slopes Nullarbor Ord Victoria Plain Pacific Subtropical Islands Pine Creek Pilbara Riverina Simpson Strzelecki Dunefields South East Coastal Plain South East Corner South Eastern Highlands South East Queensland Southern Volcanic Plain Stony Plains Sturt Plateau Subantarctic Islands Swan Coastal Plain Sydney Basin Tanami Tasmanian Central Highlands Tasmanian Northern Midlands Tasmanian Northern Slopes Tasmanian South East Tasmanian Southern Ranges Tasmanian West Tiwi Cobourg Victoria Bonaparte Victorian Midlands Warren Wet Tropics Yalgoo

Bioregions of the National Reserve System

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