Esperance mallee

Esperance mallee is an ecoregion on the south coast of Western Australia, a coastal strip where the predominant vegetation consists of short eucalyptus trees and shrubs.

Esperance mallee
Sand mallee (Eucalyptus eremophila) at Clyde Hill Nature Reserve, Western Australia
location map showing the Esperance mallee ecoregion
Ecology
Realm	Australasian
Biome	Mediterranean forests, woodlands, and scrub
Borders	Coolgardie woodlands, Southwest Australia savanna and Southwest Australia woodlands
Geography
Area	102,261 km^2 (39,483 sq mi)
Country	Australia
States	Western Australia
Conservation
Conservation status	Critical/endangered
Protected	21,103 km² (21%)[1]

Location and description

A part of the Mediterranean forests, woodlands, and scrub biome, Esperance mallee is an aggregation of the Esperance Plains and Mallee Interim Biogeographic Regionalisation for Australia (IBRA) regions.[2]

Salmon gum (Eucalyptus salmonophloia) woodland along the Coolgardie-Esperance highway in Salmon Gums, Western Australia.

The IBRA regions, with the Esperance Plains in red

The IBRA regions, with Mallee in red

Flora

Mallee is a generic term used to describe a number of eucalyptus trees that have an underground bulb called a lignotuber from which new buds can sprout following a forest fire. Mallee trees and accompanying shrubs are thus adapted to the poor soils, lack of rainfall, and regular fires, something common for the dry coast.

Fauna

Wildlife of the coast includes the highly venomous common death adder. Mammals include tiny honey possums (which feed on nectar of the kangaroo paw flowers) and the endangered western quoll. Birds include the endangered western whipbird, western ground parrots, red-winged fairywren, Australian white ibis, and the rare southwestern Cape Barren goose on the coast.

Threats and preservation

Much of the area is used as agricultural land and habitats are threatened by clearance. This is leading to fragmentation, over-irrigation, and wildlife becoming vulnerable to introduced species such as foxes.

The Esperance mallee ecoregion, with agricultural areas in yellow, and native vegetation in green. The IBRA boundaries are shown in red. Towns, road, and railways are also shown.

Protected areas

A 2017 assessment found that 21,103 km², or 21%, of the ecoregion is in protected areas.[3] Protected areas include Cape Arid National Park, Fitzgerald River National Park, Frank Hann National Park, and Nuytsland Nature Reserve.

References

1. Eric Dinerstein, David Olson, et al. (2017). An Ecoregion-Based Approach to Protecting Half the Terrestrial Realm, BioScience, Volume 67, Issue 6, June 2017, Pages 534–545; Supplemental material 2 table S1b.
2. "Esperance mallee". Terrestrial Ecoregions. World Wildlife Fund.
3. Eric Dinerstein, David Olson, et al. (2017). An Ecoregion-Based Approach to Protecting Half the Terrestrial Realm, BioScience, Volume 67, Issue 6, June 2017, Pages 534–545; Supplemental material 2 table S1b.

• World Wildlife Fund, ed. (2001). "Esperance mallee". WildWorld Ecoregion Profile. National Geographic Society. Archived from the original on 8 March 2010. Retrieved 16 February 2007.

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