|Scientific Name:||Riekoperla darlingtoni|
|Species Authority:||(Illies, 1968)|
|Red List Category & Criteria:||Critically Endangered B1ab(v)+2ab(v) ver 3.1|
This species has a highly restricted range; it has an extent of occurrence (EOO) of 4 km2, an area of occupancy (AOO) of between 2-4 km2 and is known from a single location. Its habitat is threatened by changes in water flow resulting from climate change, from fires and development. Habitat change caused by myrtle wilt disease may also threaten the species in the future. There has been a continuing decline in the number of mature individuals, observed from 2005 to 2012. Therefore, this species is assessed as Critically Endangered.
|Range Description:||This species is known from the Mt Donna Buang area, near Warburton, in the Victorian Central Highlands, Australia. Most specimens have been recorded within c. 1 km from the summit of Mt Donna Buang, with a single record from a location 3 km northeast of the summit (Ahearn and Tsyrlin 2003). No specimens have been recorded from the site 3 km northeast of the summit since 1999. If this site is not included then the area of occupancy (AOO) is less than 2 km2.|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Limited qualitative data have been collected annually since 2005. Approximately 5000 nymphs were recorded in 2005 at the type locality but the population appears to be declining since then. Estimated numbers were approximately 500 at the type locality in 2011 and 2012.|
|Habitat and Ecology:||This species occurs in small ephemeral streams in montane wet forest dominated by Alpine Ash (Eucalyptus delegatensis) and Shining Gum (Eucalyptus nitens) with cool temperate rainforest patches of Myrtle Beech (Nothofagus cunninghamii).|
|Major Threat(s):||Threats include changes in climate, particularly reduction in precipitation in the long term, sustained drought and fire, and increased development for tourism, storm water run-off from development, construction and maintenance of roads and tracks and possibly the fungal disease Myrtle Wilt (Chalara australia) as a threat to the myrtle beech understorey (Ahern and Tsyrlin 2003).|
An Action Statement was prepared under the Victorian Flora and Fauna Guarantee Act (Ahern and Tsyrlin 2003). The species needs continued site protection and vigilant management of road, track and car park maintenance, and listing under the Commonwealth Environment Protection and Biodiversity Act 1999. Note this species was deemed to not meet the criteria to be listed under the Australian Commonwealth Environment Protection and Biodiversity Conservation Act 1999 (see http://www.environment.gov.au/biodiversity/threatened/species/riekoperla-darlingtoni.html). Continued listing under the Victorian Fauna and Flora Guarantee Act 1988 is required. New (2008) used R. darlingtoni to highlight ambiguities and inconsistencies in legislation for listing species for conservation status.
For research there is a need for non-destructive quantitative evaluation of population numbers to confirm population trends.
|Citation:||Suter, P. 2014. Riekoperla darlingtoni. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 01 August 2014.|
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