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A first approach to a faunistic crenon typology based on functional feeding groups
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
ID 532194
Author(s) Von Fumetti, Stefanie; Nagel, Peter
Author(s) at UniBasel von Fumetti, Stefanie
Nagel, Peter
Year 2011
Title A first approach to a faunistic crenon typology based on functional feeding groups
Journal Journal of limnology
Volume 70
Number Supplement 1
Pages / Article-Number 147-154
Keywords macroinvertebrates, faunistic classification, lotic springs, lentic springs

Springs are ecomorphologically and faunistically diverse freshwater ecosystems. Their limnological classification has been a
focus of interest since crenic research began. Despite many attempts to include the crenic fauna in the classification of springs, there
is no faunistic crenon typology. Over a three-year period we investigated the macroinvertebrate assemblages and the physical,
chemical and ecomorphological conditions of 82 springs in the Swiss Jura Mountains, north-western Switzerland. Based on these
data we selected the 25 least-disturbed springs to develop a faunistic crenon classification. Based on functional feeding groups we
differentiated three crenon groups. An analysis of similarities and nonmetric multidimensional scaling for the substratum types
supported the crenon groupings. In general we can distinguish between springs that are dominated by scrapers and characterized by
a lotic environment, and those that are mostly inhabited by filtering collectors, associated with a lentic environment. Those two
crenon types are the extremes of a continuum. Particular crenon forms, such as those with extensive carbonate deposits, lie between
these extremes. This third group is characterized by gathering collectors and shredders. Using this approach we can distinguish
faunistic crenon types, based on functional feeding groups, which reflect the abiotic conditions within the springs. We provide a
foundation for a faunistic crenon typology which now can be tested in other landscapes and will then be applicable to other low
mountain ranges in Europe.

Publisher Istituto Italiano di Idrobiologia
ISSN/ISBN 1129-5767
Full Text on edoc No
Digital Object Identifier DOI 10.3274/JL11-70-S1-11
ISI-Number WOS:000289588500012
Document type (ISI) Article

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