Auxiliary Material
Diatom species found in GGC6 and included in the different groups

Fresh-water species
Achnanthes delicatula (Kuetzing) Grunow in Cleve et Grunow
Achnanthes lanceolata (Brebisson in Kuetzing) Grunow in Cleve et Grunow
Achnanthes minutissima (Kuetzing)
Amphora copulata (Kuetzing) Schoeman et Archibald
Aneumastis tusculus (Ehrenberg) Mann et Stickle (also found as a coastal species)
Aneumastus stroesei (Ostrup) Mann
Aulacoseira granulata (Ehrenberg) Simonsen
Caloneis bacillaris (Gregory) Cleve
Cocconeis placentula (Ehrenberg)
Cyclotella kuetzingiana var. planctophora (Thwaites)
Diploneis marginestriata (Hustedt)
Eunotia kocheliensis (Mueller)
Eunotia pectinalis (Mueller) Rabenhorst
Gomphonema angustum (Agardh)
Gomphonema subtile (Ehrenberg)
Luticola mutica (Kuetzing) Mann
Navicula capitata (Ehrenberg)
Neidium productum (Smith) Cleve
Nitzschia acicularis (Kuetzing) Smith
Nitzschia capitellata (Hustedt)
Nitzschia gracilis (Hantzsch)
Nitzschia rosenstockii (Lange-Bertalot)
Pinnularia microstauron (Ehrenberg) Cleve
Pseudostaurosira brevistriata (Grunow in Van Heurck) Williams et Round
Sellaphora pupula (Kuetzing) Mereschkowsky
Staurosira construens (Ehrenberg)
Staurosirella pinnata (Ehrenberg) Williams et Round
Stephanodiscus hantzschii (Grunow)

Brackish water species
Actinocyclus normanii (Gregory ex Greville) Hustedt ex Van Landingham
Amphora exigua (Gregory)
Caloneis westii (Smith)
Cocconeis peltoides (Hustedt)
Craticula halophila (Grunow ex Van Heurck) Mann
Cyclotella striata (Kuetzing) Grunow in Cleve et Grunow
Diploneis smithii (Brebisson ex Smith) Cleve
Epithemia adnata (Kuetzing) Rabenhorst
Martyana martyi (Heribaud) Round
Navicula peregrina (Ehrenberg) Kuetzing
Navicula protracta (Grunow in Cleve et Grunow)
Navicula salinarum (Grunow in Cleve et Grunow)
Nitzschia lacunarum (Hustedt)
Nitzschia lanceolata (Smith) (also found as a coastal species)
Nitzschia ovalis (Arnott in Cleve et Grunow)
Stauroneis amphioxys var. obtusa (Gregory) Mann
Tryblionella debilis (Arnott in O'Meara)

Temperate to warm water species
Actinoptychus senarius (Ehrenberg) Ehrenberg
Coscinodiscus marginatus (Ehrenberg)
Coscinodiscus radiatus (Ehrenberg)
Dictyoneis marginata (Lewis) Cleve
Nitzschia bicapitata (Cleve)
Nitzschia sicula (Castracane) Hustedt
Rhizosolenia hebetata forma semispina (Hensen) Gran
Roperia tesselata (Roper) Grunow in Van Heurck
Thalassiosira anguste-lineata (Schmidt) Fryxell et Hasle
Thalassiosira diporocyclus (Hasle)

Warm water species
Alveus marinus (Grunow) Kaczmarska et Fryxell
Asterolampra marylandica (Ehrenberg)
Asteromphalus arachne (Brebisson) Ralfs in Pritchard
Asteromphalus elegans (Greville)
Asteromphalus flabelatus (Brebisson) Greville
Asteromphalus roperianus (Greville) Ralfs in Pritchard
Azpeitia africana (Janisch ex Schmidt) Fryxell et Watkins
Azpeitia neocrenulata (Van Landingham) Fryxell et Watkins
Azpeitia nodulifera (Schmidt) Fryxell et Sims
Bacteriastrum comosum (Pavillard)
Delphineis surirelloides (Simonsen)
Fragilariopsis doliolus (Wallich) Medlin et Sims
Hemiaulis hauckii (Grunow ex Van Heurck)
Hemidiscus cuneiformis (Wallich)
Nitzschia interruptestriata (Simonsen)
Nitzschia kolaczeckii (Grunow)
Rhizosolenia bergonii (Peragallo)
Pseudosolenia calcar-avis (Schultze) Sundstroem
Thalassionema bacillare (Heiden in Heiden et Kolbe) Kolbe
Thalassionema frauenfeldii (Grunow) Hallegraeff
Thalassiosira endoseriata (Hasle et Fryxell)
Thalassiosira exigua (Fryxell et Hasle)
Thalassiosira ferelineata (Hasle et Fryxell)
Thalassiosira lineata (Jouse)
Thalassiosira nanolineata (Mann) Fryxell et Hasle

Cold water species
Asteromphalus hookeri (Ehrenberg)
Asteromphalus parvulus (Karsten)
Bacteriosira fragilis (Gran)
Chaetoceros debilis (Cleve)
Chaetoceros furcellatus (Bailey)
Fragilariopsis oceanica (Cleve) Hasle
Fragilariopsis ritscheri (Hustedt)
Porosira glacialis (Grunow) Jorgensen
Rhizosolenia styliformis (Brightwell)
Thalassiosira lentiginosa (Janish) Fryxell
Thalassiosira nordenskioeldii (Cleve)
Trichotoxon reinboldii (Van Heurck) Reid et Round

Cold to temperate water species
Coscinodiscus curvatulus (Grunow)

Species frequently reported from coastal environment
Cymatosira belgica (Grunow)
Navicula cancellata (Donkin)
Cymatosira lorenziana (Grunow in Van Heurck) (also reported as a warm water species)
Navicula directa (Smith) Ralfs in Pritchard
Nitzschia angularis (Smith)
Rhaphoneis amphiceros (Ehrenberg)
Thalassiosira decipiens (Grunow) Jorgensen
Thalassiosira gravida (Cleve)