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Temperature variability and its influence on macroinvertebrate assemblages of alpine springs
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 3999133
Author(s) von Fumetti, Stefanie; Bieri‐Wigger, Fabian; Nagel, Peter
Author(s) at UniBasel von Fumetti, Stefanie
Wigger, Fabian
Nagel, Peter
Year 2017
Title Temperature variability and its influence on macroinvertebrate assemblages of alpine springs
Journal Ecohydrology
Volume 10
Number 7
Pages / Article-Number 10.e1878
Keywords crenobiontic species
Abstract Constant water temperature is thought to be a key factor for macroinvertebrates inhabiting springs. Springs in low mountain ranges are usually fed by deep groundwater. At high altitudes, they are, to a certain degree, fed by near‐surface aquifers and are influenced by snow and permafrost meltwater. This may alter temperature constancy. In this study, we examined 13 springs in the Bernese Alps in Switzerland during 1†year. The aim was to investigate the variability of water temperature and its influence on macroinvertebrate assemblages of alpine springs at different altitudes. Water temperature and solar radiation were continuously monitored; electrical conductivity, pH, and oxygen were measured; and a quantitative sampling of the macroinvertebrates was conducted 3 times from June 2010 to July 2011. Using linear correlation analysis, we detected a significant decrease of the variability of water temperature along the altitudinal gradient. Electrical conductivity was significantly lower in springs at high altitude. This might indicate an influence of snow and permafrost meltwater. The percentage of alpine species significantly increased with altitude. Taxon richness and the percentage of crenobiontic species were not significantly correlated with any physicochemical parameter. Monthly temperature amplitude and snow cover had a significant influence on the composition of macroinvertebrate assemblages, distinguishing high alpine springs from those at lower altitude. Harsh environmental conditions with low but constant water temperatures fostered alpine rhithrobiontic species, also directly at the outflow, that is, in springs. A loss of such highly adapted species is predicted due to climate change.
Publisher Wiley
ISSN/ISBN 1936-0584 ; 1936-0592
edoc-URL http://edoc.unibas.ch/57152/
Full Text on edoc No
Digital Object Identifier DOI 10.1002/eco.1878
ISI-Number WOS:000412418300011
Document type (ISI) Article
 
   

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