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Aquatic molluscs in high mountain lakes of the Eastern Alps (Austria): Species-environment relationships and specific colonization behaviour[J]. 海洋湖沼学报(英文), 2012,30(1):59-70.
Sturm, R. Aquatic molluscs in high mountain lakes of the Eastern Alps (Austria): Species-environment relationships and specific colonization behaviour., Chin. J. Ocean. Limnol. 30, 59–70 (2012). https://doi.org/10.1007/s00343-012-1007-0
Aquatic molluscs in high mountain lakes of the Eastern Alps (Austria): Species-environment relationships and specific colonization behaviour[J]. 海洋湖沼学报(英文), 2012,30(1):59-70. DOI: 10.1007/s00343-012-1007-0.
Sturm, R. Aquatic molluscs in high mountain lakes of the Eastern Alps (Austria): Species-environment relationships and specific colonization behaviour., Chin. J. Ocean. Limnol. 30, 59–70 (2012). https://doi.org/10.1007/s00343-012-1007-0 DOI:
Mountain lakes represent essential stages for aquatic species on their way colonizing habitats of more elevated regions. Despite extensive biological and chemical study
only little has been reported about the species number and density of freshwater molluscs in these waters. The article presented here elucidates the dispersal of aquatic gastropods and bivalves in 12 mountain lakes that are commonly situated in the Eastern Alps
Austria. Molluscs were recorded at 120 sample points
where a total of 13 species (8 gastropods and 5 bivalves) could be determined. Species distribution data as well as results from contemporarily conducted physico-chemical factor recording were subject to weighted average analysis. In addition
a global marginality coefficient indicating the particularity of a habitat inhabited by a focal species as well as a global tolerance coefficient expressing the width of a niche occupied by this species were computed. Species-environment relationships exhibited that species number and specific density decrease with increasing geographic altitude
declining water temperature
and decreasing amount of submerged vegetation. Whilst waters of the montane altitude level are partly charcterized by high number of mollusc species (> 10)
lakes of the subalpine altitude level commonly bear 1 or 2 species with ≪1 ind./m2. As proposed by the results of statistics
9 of the 13 mollusc species are characterized by a pronounced behaviour as specialists with respect to most environmental factors. The four remaining species
Pisidium casertanum
Galba truncatula
Radix labiata
and Radix balthica
act as generalists which increases their pioneering role in the long-term occupation of the Central-alpine region.
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