• Source: Eyre Yorke Block

The Eyre Yorke Block, also known as the Eyre and Yorke mallee, is an interim Australian (IBRA) bioregion and a World Wildlife Fund ecoregion covering part of the Eyre Peninsula and all of Yorke Peninsula as well as land to its immediate east in South Australia.






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).




= Subregions

=
The IBRA identifies five subregions of the bioregion:

Southern Yorke – 438,470 hectares (1,083,500 acres)
St Vincent – 1,093,789 hectares (2,702,810 acres)
Eyre Hills – 1,172,576 hectares (2,897,500 acres)
Talia – 1,096,175 hectares (2,708,710 acres)
Eyre Mallee – 2,319,398 hectares (5,731,360 acres)




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 the Eyre Peninsula flora 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 western 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


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.




Protected areas


15.24% of the ecoregion is in protected areas. They include:




References






Further reading


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




External links


Media related to Eyre Yorke Block at Wikimedia Commons

Kata Kunci Pencarian:

• Eyre Yorke Block
• Yorke Peninsula
• Eyre Peninsula
• Regions of South Australia
• Gawler Ranges National Park
• Lincoln National Park
• Yalata Indigenous Protected Area
• Australian Alps
• Dhilba Guuranda–Innes National Park
• Coffin Bay National Park