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Biodiversity and ecology of diatoms in mineral springs of the area of Sainte Marguerite (Saint-Maurice-ès-Allier, Massif central, France)

Abstract : This study investigated the diatom flora from mineral springs in Auvergne (France). Samples were collected from rock/cobbles and fine sediments in 17 springs between November 2014 and April 2015 in which a total of 58 taxa were found. Among the different taxa present in some of the studied springs, two have been recently described: Navicula sanctamargaritae and Sellaphora labernardierei. Crenotia thermalis was observed in all sites except in the Nid de l’Epervier spring. Multivariate analyses revealed differences in species abundance among the springs due to the physical and chemical characteristics and mainly to the presence or absence of nutrients. Petit Jean spring is separated from the other springs and is characterized by a lower calcium concentration. In this site, Pinnularia kuetzingii, Navicula veneta and Fallacia pygmaea were the dominant species. This study brings a better knowledge of the diatom biodiversity of mineral springs and the ecology of each species present.
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Submitted on : Thursday, October 22, 2020 - 10:16:04 AM
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Beauger Aude, Olivier Voldoire, Wetzel Carlos, Elisabeth Allain, Fanny Millan, et al.. Biodiversity and ecology of diatoms in mineral springs of the area of Sainte Marguerite (Saint-Maurice-ès-Allier, Massif central, France). BIOM - Revue scientifique pour la biodiversité du Massif central, Université Clermont Auvergne, 2020, 1 (1), pp.21-34. ⟨10.18145/biom.v1i1.250⟩. ⟨hal-02974803⟩

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