Occurrence (%)
Taxon name Dataset region Minimum Average Maximum
Achnanthes minutissima Kützing Yellowknife area, Northwest Territories, Canada (YEL) 0.85 6.30 13.48
Cyclotella stelligera (Cleve et Grunow) Van Heurck Lena River, Russia (LEN) 0.31 6.30 28.16
Fragilaria capucina var. capucina Desmazières 1825 Isachsen, Ellef Ringnes Island, Canadian High Arctic (ISACH) 3.30 6.23 8.63
Achnanthes clevei Grunow Yellowknife area, Northwest Territories, Canada (YEL) 6.20 6.20 6.20
Fragilaria cf. perminuta DERMOT CDD Isachsen, Ellef Ringnes Island, Canadian High Arctic (ISACH) 0.38 6.14 13.52
Caloneis cf. bacillum DERMOT Isachsen, Ellef Ringnes Island, Canadian High Arctic (ISACH) 0.29 6.01 47.67
Diadesmis paracontenta Isachsen, Ellef Ringnes Island, Canadian High Arctic (ISACH) 0.60 5.97 37.41
Amphora libyca Ehrenberg 1840 Bylot Island, Nunavut, Canada. (BYL) 0.10 5.96 14.00
Psammothidium marginulatum (Grunow) Bukhtiyarova et Round Isachsen, Ellef Ringnes Island, Canadian High Arctic (ISACH) 0.38 5.91 32.39
Fragilaria construens var. venter (Ehrenberg) Grunow Labrador, Canada (LAB) 0.20 5.89 23.10
Fragilaria brevistriata Grunow Abisko, Sweden (ABK) 0.23 5.88 48.39
Fragilaria brevistriata var. papillosa Cleve-Euler Salluit, Kangiqsujuaq and Quaqtaq, Ungava Peninsula, Nunavik, Canada (SAL) 0.31 5.85 19.03
Pinnularia balfouriana Grunow ex Cleve Bylot Island, Nunavut, Canada. (BYL) 0.19 5.85 19.77
Achnanthidium minutissimum (Kützing) Czarnecki Bylot Island, Nunavut, Canada. (BYL) 0.11 5.84 32.00
Hygropetra balfouriana Grunow ex Cleve Isachsen, Ellef Ringnes Island, Canadian High Arctic (ISACH) 0.37 5.83 22.18
Fragilaria pseudoconstruens Marciniak Abisko, Sweden (ABK) 0.24 5.76 28.47
Aulacoseira perglabra (Østrup) Haworth Abisko, Sweden (ABK) 0.23 5.75 50.12
Achnanthes marginulata Grunow Labrador, Canada (LAB) 0.20 5.74 31.70
Navicula phylleptosoma Lange-Bertalot Isachsen, Ellef Ringnes Island, Canadian High Arctic (ISACH) 0.37 5.62 15.92
Aulacoseira distans var. nivalis (Smith) Haworth Yukon and Tuktoyaktuk Peninsula, Northwest Territories, Canada (YUK) 0.66 5.59 10.53
Navicula reinhardtii (Grunow) Grunow Mould Bay, Prince Patrick Island, Canadian Arctic Archipelago (MB) 4.80 5.57 6.34
Tabellaria flocculosa (Roth) Kützing Lena River, Russia (LEN) 0.31 5.56 18.58
Staurosirella pinnata (Ehrenberg) Williams et Round Isachsen, Ellef Ringnes Island, Canadian High Arctic (ISACH) 0.38 5.50 11.44
Psammothidium marginulatum (Grunow) Bukhtiyarova et Round Mould Bay, Prince Patrick Island, Canadian Arctic Archipelago (MB) 0.33 5.49 26.58
Navicula chiarae Alert, Queen Elizabeth Islands, Canadian Arctic Archipelago (ALERT) 0.38 5.47 18.01
Cyclotella pseudostelligera Hustedt Salluit, Kangiqsujuaq and Quaqtaq, Ungava Peninsula, Nunavik, Canada (SAL) 0.20 5.45 23.36
Pinnularia biceps Gregory Abisko, Sweden (ABK) 0.23 5.45 32.35
Fragilaria construens var. venter (Ehrenberg) Grunow Lena River, Russia (LEN) 0.31 5.39 15.89
Thalassiosira pseudonana Hasle et Heimdal Taimyr Peninsula, Russia (TAI) 0.63 5.38 10.12
Planothidium peragalloi Alert, Queen Elizabeth Islands, Canadian Arctic Archipelago (ALERT) 5.32 5.32 5.32
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