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Belgrandiella aulaei 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Littorinimorpha Hydrobiidae

Scientific Name: Belgrandiella aulaei Haase, Weigand & Haseke, 2000
Taxonomic Notes: This species is one of many small spring-snail species that can be most easily be identified using anatomical characters of the reproductive system.

Assessment Information [top]

Red List Category & Criteria: Endangered B2ab(iii) ver 3.1
Year Published: 2010
Date Assessed: 2009-12-15
Assessor(s): Reischutz, P.
Reviewer(s): Vavrova, L., Soulsby, A.-M., Seddon, M.B. & Cuttelod, A.
Justification:
Belgrandiella aulaei is endemic to Austria. Currently this species is only known from two sites, however, these sites are widely spaced suggesting that it may live in other springs in the area (M. Haase pers. comm. 2009). Although this species is abundant at both sites, it is threatened by pollution at one site from agricultural sources. The other known location for this species is within a protected area. The narrow range of this species and the fact it is not protected mean this species qualifies to be classified as Endangered (EN) B2ab(iii).  If other sites are found for the species, then the status will need to be reviewed.

Geographic Range [top]

Range Description:Belgrandiella aulaei is endemic to the northern limestone Alps of Austria. Specifically it is known from the Steyr and Krumme valleys, between 365-405 metres above sea level. It is currently only known from two springs, Rinnende Mauer and the right spring of the Wunderlucke, a pond on the left bank of the River Steyrling, at Rabach, about 10 km north of Kalkalpen National Park, Ober Österreich (Haase, Weigand and Haseke 2000).
Countries occurrence:
Native:
Austria
Additional data:
Estimated area of occupancy (AOO) - km2:8
Number of Locations:2
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:This species is abundant at the two sites it is found, however the overall population trend is not known.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species inhabits freshwater springs and pools.
Systems:Freshwater
Continuing decline in area, extent and/or quality of habitat:Yes

Use and Trade [top]

Use and Trade: This species is not traded.

Threats [top]

Major Threat(s): The main threats to the species are habitat degradation, invasive non-native species and the abstraction of water, resulting in the subsequent lowering of groundwater levels. There is also pollution, mainly from fertilizers, as a result of agricultural practices, that poses a threat to this species. About 20 % of the local water supply comes from springs and a further 30% from wells and in the northern part of the valley there are some problems with nitrates in drinking water (Amt der Oö.Landesregierung 2007, Local information). 

Conservation Actions [top]

Conservation Actions: This species occurs in the Kalkalpen National Park protected area, which is also recognised as an Important Bird Area and a Natura 2000 site. Currently this species is considered one of several species of spring-snail occurring in the park that require conservation action. It is found on the Austrian Red List, where it is deemed to be 'Critically Endangered' (CR) (Reischütz and Reischütz 2007). It is suggested that the monitoring of habitats and populations is conducted, along with surveying for further populations. This species is not currently protected by law in Austria.

Citation: Reischutz, P. 2010. Belgrandiella aulaei. The IUCN Red List of Threatened Species 2010: e.T156129A4908187. . Downloaded on 22 June 2018.
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