|Scientific Name:||Austrogammarus australis (Sayce, 1901)|
Gammarus australis Sayce, 1901
|Red List Category & Criteria:||Critically Endangered B1ab(ii,iii,iv)+2ab(ii,iii,iv) ver 3.1|
This species was previously listed as Extinct based on surveys in the 1980s that did not find any A. australis in the wild (Williams and Barnard 1988). Several surveys since this time have rediscovered small populations of A. australis (Doeg et al. 1996, Papas and Crowther 2007). Austrogammarus australis is listed as ‘Vulnerable’ under the Victorian government Flora and Fauna Guarantee Act 1988. It has an extent of occurrence (EOO) of 35 km2, an area of occupancy (AOO) of 5 km2 and is found at a single location. It is categorised as Critically Endangered based on this highly restricted range, all of which is threatened by degradation of water quality through pollution and invasive species.
|Previously published Red List assessments:|
|Range Description:||The species appears to be restricted to the Dandenong Mountain Range in southern Victoria, Australia (Papas and Crowther 2007).|
|Range Map:||Click here to open the map viewer and explore range.|
A total of 287 individuals have been identified using methods described in Papas and Crowther (2007). There are no data available on current population estimates.
|Current Population Trend:||Unknown|
|Habitat and Ecology:||It occurs in upland cool freshwater streams with intact riparian vegetation and canopy cover of more than 75%. It is restricted to the Dandenong Mountain Ranges, Victoria, Australia.|
|Continuing decline in area, extent and/or quality of habitat:||Yes|
|Major Threat(s):||This species is threatened by urbanization, run-off from roads (both sealed and unsealed), damage to or removal of riparian vegetation and weed invasion of the riparian zone.|
|Conservation Actions:||The only known living animals occur at a site in the Dandenong Ranges National Park.|
|Citation:||Preston, T. 2014. Austrogammarus australis. The IUCN Red List of Threatened Species 2014: e.T2425A18607247.Downloaded on 21 April 2018.|
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