Table 1. Distribution of the diatom species in the dataset.

No.	Diatom species	#Diatoms	No.	Diatom species	#Diatoms
1	Achnanthidium biasolettianum	60	35	Halamphora veneta	40
2	Achnanthidium minutissimum	13	36	Hantzschiana abundans	10
3	Adlafia minuscula	26	37	Humidophila contenta	53
4	Amphora inariensis	6	38	Humidophila perpusilla	35
5	Amphora pediculus	22	39	Luticola nivalis	7
6	Caloneis lancettula	10	40	Meridion circulare	65
7	Cocconeis pseudolineata	49	41	Navicula capitatoradiata	15
8	Cymbella cantonatii	54	42	Navicula cryptocephala	24
9	Cymbella excisa	59	43	Navicula cryptotenella	272
10	Cymbella excisa var. procera	6	44	Navicula cryptotenelloides	77
11	Cymbella excisa var. subcapitata	44	45	Navicula gregaria	22
12	Cymbopleura amphicephala	6	46	Navicula lanceolata	9
13	Denticula kuetzingii	14	47	Navicula moskalii	19
14	Diatoma mesodon	53	48	Navicula novaesiberica	9
15	Diatoma moniliformis	56	49	Navicula reichardtiana	165
16	Didymosphenia geminata	6	50	Navicula tripunctata	22
17	Diploneis fontanella	8	51	Navicula trivialis	34
18	Encyonema silesiacum	182	52	Navicula upsaliensis	45
19	Encyonema ventricosum	61	53	Neidiomorpha binodiformis	6
20	Epithemia argus	17	54	Nitzschia archibaldii	19
21	Epithemia goeppertiana	7	55	Nitzschia hantzschiana	30
22	Fragilaria recapitellata	184	56	Nitzschia linearis	36
23	Frustulia vulgaris	12	57	Nitzschia palea	6
24	Gomphonema calcifugum	39	58	Nitzschia recta	7
25	Gomphonema drutelingense	15	59	Pantocsekiella ocellata	27
26	Gomphonema exilissimum	8	60	Pinnularia brebissonii	36
27	Gomphonema micropus	16	61	Planothidium frequentissimum	26
28	Gomphonema minutum	15	62	Planothidium lanceolatum	132
29	Gomphonema olivaceum	386	63	Rhoicosphenia abbreviata	77
30	Gomphonema pumilum	11	64	Sellaphora radiosa	9
31	Gomphonema pumilum var. rigidum	33	65	Sellaphora saugerresii	6
32	Gomphonema supertergestinum	14	66	Stauroneis blazenciciae	7
33	Gomphonema tergestinum	85	67	Surella minuta	6
34	Halamphora paraveneta	33	68	Surirella brebissonii var. kuetzingii	64