Abstract
Studies investigating congruent variations in species richness patterns in alpine habitats are scarce. We investigated the potential of using the indicator taxa approach for species richness in alpine habitats of the Scandes (Norway). In four areas, we investigated seven functional and taxonomic terrestrial groups of organisms and evaluated their contribution to the species diversity. The function of each group as a surrogate for the overall species diversity or for the diversity of another taxon was analysed. Three groups of invertebrates (spiders without Lycosids, Lycosids only, and ground beetles), three groups of plants (shrubs, graminoids, and herbs), and lichens were used for a cross-taxon analysis of species diversity. Congruence in species richness was restricted to several significant results, with vascular plants and spiders (Araneae) being best suited as surrogate taxa in alpine habitats of the Scandes. In the cross-taxon analyses they showed strongest significant positive correlations, covering the total species richness of the alpine habitats best. Species counts in one group account for up to 70% of the variation in total species richness. We found only limited evidence for an ideal, efficient biodiversity indicator taxon that could be applied without restrictions at different alpine habitats in low and middle alpine areas. Thus, our results suggest that it is very important to use more than one taxon as indicator for species richness in terrestrial alpine habitats. This should facilitate future conservation planning in alpine areas.


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Acknowledgements
R. Pape, J. Naujok, and O. Roessler helped during the fieldwork. The landowners granted us access to their land, and the Standa and Vågå communities gave permission for our investigations. The study was partly sponsored by Colour Line AS, Oslo. Thanks to all!
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Finch, OD., Löffler, J. Indicators of species richness at the local scale in an alpine region: a comparative approach between plant and invertebrate taxa. Biodivers Conserv 19, 1341–1352 (2010). https://doi.org/10.1007/s10531-009-9765-5
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DOI: https://doi.org/10.1007/s10531-009-9765-5


