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New European locality of Gomphonema varians E. Reichardt & Levkov and first record in Poland
 
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1
University of Rzeszów, Faculty of Technology and Life Sciences, Department of Soil Science, Environmental Chemistry and Hydrology, ul. Zelwerowicza 8B, 35–601 Rzeszów
 
2
39-107 Niedźwiada 142
 
3
University of Rzeszów, Faculty of Technology and Natural Sciences, Department of Landscape Architecture ul. Ćwiklińskiej 1a, 35–601 Rzeszów
 
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Autor do korespondencji
Teresa Noga   

University of Rzeszów, Faculty of Technology and Life Sciences, Department of Soil Science, Environmental Chemistry and Hydrology, ul. Zelwerowicza 8B, 35–601 Rzeszów
 
 
 
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STRESZCZENIE
The aim of this work is to indicate a new locality of Gomphonema varians in Poland, in the Kisielina River, together with photographic documentation under LM and SEM, and to compare the species with similar taxa from the Gomphonema genus like G. parvulum, G. micropus, and G. sarcophagus. The species often coexisting and may be confused and, consequently, misidentified. The research was carried out in 2023 in April and September at seven sites designated along a rivercourse in SE Poland. Findings indicate that G. varians prefers stagnant waters, mesotrophic to meso-eutrophic conditions, alkaline to neutral pH, and low electrical conductivity.
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