Occurrence (%)
Taxon name Dataset region Minimum Average Maximum
Achnanthes marginulata Grunow Labrador, Canada (LAB) 0.20 5.74 31.70
Nitzschia perminuta (Grunow) Peragallo Mould Bay, Prince Patrick Island, Canadian Arctic Archipelago (MB) 0.95 14.63 31.61
Gomphonema lagerheimii Cleve Bylot Island, Nunavut, Canada. (BYL) 2.00 12.92 31.50
Aulacoseira distans (Ehrenberg) Simonsen Salluit, Kangiqsujuaq and Quaqtaq, Ungava Peninsula, Nunavik, Canada (SAL) 0.31 4.53 31.35
Fragilaria pinnata Ehrenberg Northern Sweden (SWE) 0.19 7.18 30.35
Fragilaria pinnata var. lancettula (Schumann) Hustedt Southampton Island, Nunavut, Canada (SI) 10.60 18.48 30.34
Denticula subtilis Grunow Isachsen, Ellef Ringnes Island, Canadian High Arctic (ISACH) 0.75 15.36 29.96
Tabellaria flocculosa (Roth) Kützing Southampton Island, Nunavut, Canada (SI) 0.17 7.81 29.69
Pinnularia biceps Gregory Northern Sweden (SWE) 0.19 4.26 29.44
Eunotia intermedia (Krasske ex Hustedt) Nörpel et Lange-Bertalot Pechora River, Russia (PEC) 0.28 4.27 29.37
Fragilaria pinnata Ehrenberg Yellowknife area, Northwest Territories, Canada (YEL) 0.29 5.02 29.17
Brachysira vitrea (Grunow) Ross Abisko, Sweden (ABK) 0.23 3.59 28.94
Aulacoseira subarctica IR DIAT_UME morphotype II Gulspettvatn 1989 Abisko, Sweden (ABK) 0.47 7.91 28.85
Nitzschia alpina Hustedt Mould Bay, Prince Patrick Island, Canadian Arctic Archipelago (MB) 0.30 5.30 28.71
Achnanthes cf. minutissima [minutissima agg.] DIAT_UME Kützing Northern Sweden (SWE) 0.17 6.32 28.63
Fragilaria pseudoconstruens Marciniak Abisko, Sweden (ABK) 0.24 5.76 28.47
Cyclotella stelligera (Cleve et Grunow) Van Heurck Lena River, Russia (LEN) 0.31 6.30 28.16
Fragilaria construens fo. venter (Ehrenberg) Hustedt 1957 Southampton Island, Nunavut, Canada (SI) 6.27 10.19 27.94
Aulacoseira distans var. alpigena (Grunow in Van Heurck) Simonsen 1979 Abisko, Sweden (ABK) 0.21 4.49 27.76
Fragilaria brevistriata Grunow Northern Sweden (SWE) 0.19 4.56 27.32
Fragilaria virescens var. exigua Grunow Bylot Island, Nunavut, Canada. (BYL) 2.99 18.01 27.27
Diadesmis laevissima (Cleve) Mann Isachsen, Ellef Ringnes Island, Canadian High Arctic (ISACH) 0.32 4.71 26.72
Aulacoseira subarctica (Müller) Haworth Southampton Island, Nunavut, Canada (SI) 0.18 11.14 26.61
Psammothidium marginulatum (Grunow) Bukhtiyarova et Round Mould Bay, Prince Patrick Island, Canadian Arctic Archipelago (MB) 0.33 5.49 26.58
Cyclotella pseudostelligera Hustedt Northern Quebec (QUE) 0.20 3.89 26.00
Fragilaria construens var. venter (Ehrenberg) Grunow Bylot Island, Nunavut, Canada. (BYL) 19.34 22.52 25.84
Fragilaria construens var. venter (Ehrenberg) Grunow Northern Quebec (QUE) 0.20 4.01 25.80
Aulacoseira distans var. nivalis (Smith) Haworth Abisko, Sweden (ABK) 0.23 3.59 25.55
Eunotia pectinalis var. minor (Kützing) Rabenhorst Abisko, Sweden (ABK) 0.21 1.79 25.25
Eunotia rhomboidea Hustedt Abisko, Sweden (ABK) 0.24 2.61 25.12
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