Original paper
Diatoms of Gérardmer Lake (Vosges, France)
Heudre, D.; Wetzel, C.E.; Moreau, L.; Ector, L.
Nova Hedwigia, Beihefte Beih. 146 (2018), p. 253 - 277
59 references
published: Jan 3, 2018
Abstract
The Gérardmer Lake is a glacial lake on granitic substratum located in North-Eastern France, in the Vosges Mountains (altitude 660 m). It is situated in the upper part of the Vologne River basin, a right bank tributary of the Moselle River. It has a surface area of 115.5 ha, a maximum depth of 36.3 m and a mean retention time of one year. An experimental protocol has been setup since 2015 for the survey of benthic diatoms in French lakes. The Gérardmer Lake was studied according to this protocol for the French part of the Rhine-Meuse river basin. In this study, 105 taxa belonging to 36 genera were found. The Achnanthidiaceae and the Fragilariaceae are the two families with the highest species richness: 24 species were found in both families. However, the genera Eunotia and Psammothidium are the most species-rich with 11 species each. Large populations of poorly known species such as Psammothidium levanderi, Sellaphora chistiakovae, Staurosira opacolineata and Stauroforma inermis have been studied under scanning electron microscopy (SEM). The Hustedt type material of Achnanthes levanderi and var. helvetica was also illustrated by SEM.
Keywords
Bacillariophyta • East of France • Hustedt type material • lake • scanning electron microscopy