Overview of the most abundant taxa (≥ 1% relative abundance in at least one sample). 2 Cyclotella meneghiniana 3Eunotia cf. meridiana4 Eunotia sp. 1 5 Eunotia sp. 3 6 Eunotia sp. 2 7 Eunotia minor 8 Fragilaria pectinalis 9 Fragilaria austriaca 10 Fragilaria bidens 11 Fragilaria tenera 12–13 Achnanthidium sp. 5 14–15Achnanthidium aff. catenatum16–17 Achnanthidium sp. 1 18–19 Achnanthidium minutissimum 20–21 Achnanthidium sp. 4 22–23 Planothidium rostratum 24–25 Planothidium victori 26–27 Planothidium incuriatum 28–29 Planothidium cryptolanceolatum 30–31 Cocconeis pediculus 32–33 Cocconeis sp. 2 34 Ulnaria ulna. Scale bar 10 μm.