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In 2003 and 2004, selected spring waters were recorded on the Sulzkaralm in the Gesäuse National Park. The study area is located in the ecoregion 4 Alps, Bioregion 5 lime prealps" (Moog et al. 2001). All six sources studied belong to the flow sources (rheocrenes) according to limnological typology and all have a perennial bulking. The degree of isolation to the pre-flood (Gebirgsbach) is extraordinarily high due to the underground outflow of the Sulzkarbach, the central flowing water of the Sulzkaralm, as well as from some spring drains. This would indicate a particularly high level of colonisation of source-typical organisms in natural sources. The proven animal species basically reflect the known species inventory of karst springs in the Alpine region. Within the insect regimes, the rock and quiver flies, which have been studied due to their good bio-indication, all of them have been observed several times in the Northern Limestone Alps. The majority are considered to be frequent inhabitants of sources (Eukrenal) and spring drains (Hypokrenal) as well as flowing waters of the highest mountain stream region (Epirhithral). There is a high population density of Plecopteren (stone flies), which are considered to be characteristic settlers of sommerkalter flowing waters. The high density of trichopterene (cook flies) and turbellaria (strudelworms) as well as the low frequency of simuliids (crawling mosquitoes; a few species may infest lethal grazing animals) and the lack of detection of hydrobiids (source snails) and, more generally, of forms of underground waters.

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Name	Format	Description	Link
	33		http://www.nationalpark.co.at/de/forschung/veroeffentlichungen/gewaesser-und-quellen/3500-2004-hydrobiologische-erstcharakterisierung-bedeutender-karstquellen-der-sulzkaralm-nationalpark-gesaeuse-3500

Hydrobiological initial characterisation of important karst springs of the Sulzkaralm (Gesäuse National Park)

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