Soil1 Soil2 Soil3 Soil4 Soil5 Soil6 Soil7 Soil8 Soil9 Soil10 Lake Achnanthes coarctata  1 Achnanthes muelleri 1 Achnanthes taylorensis 93 Brachysira minor 30 1 Eunotia pseudopaludosa 11 5 143 4 Eunotia ralitsae 7 1 1 Fragilaria cf. parva 1 6 4 1 238 Gomphonema maritimo-antarcticum 2 13 22 6 2 3 21 Halamphora oligotraphenta 2 9 1 Hantzschia abundans  1 Hantzschia amphioxys 1 4 1 3 1 1 21 1 1 Hantzschiaacuticapitata  1 Hantzschia hyperaustralis  1 Hantzschia incognita 1 Humidophila aff. nienta 1 Humidophila australis 1 1 10 3 Humidophila australoshetlandica 133 8 1 5 1 1 9 Humidophila arcuata 6 Humidophila inconspicua 3 Humidophila keiliorum 1 4 5 Humidophila sceppacuerciae 2 4 1 Humidophila tabellariaeformis 1 1 31 4 3 3 Humidophila vojtajarosikii 10 23 1 Chamaepinnularia australomediocris 1 Chamaepinnularia gerlachei 1 2 1 1 Chamaepinnularia krookiformis 2 1 44 2 8 1 3 Chamaepinnularia krookii 2 Luticola australomutica 1 2 Luticola austroatlantica 1 1 4 2 Luticola doliiformis  1 Luticolacf. katkae 1 Luticola muticopsis  1 62 88 3 2 9 70 162 1 Luticola permuticopsis 10 14 35 Luticola pusilla 2 1 1 Luticola subcrozetensis 1 1 39 1 1 Luticola truncata 1 19 153 62 62 Luticola sp. 34 16 Luticola vermuelenii 1 Microcostatus australoshetlandicus 2 1 Microcostatus naumannii 1 Muelleria aequistriata 1 Muelleria algida 1 6 Muelleria aff. kristinae 1 Muelleria aff. nogae 1 Muelleria sabbei 3 Navicula australoshetlandica 1 1 Navicula bicephaloides 3 1 Navicula gregaria 1 Navicula romanedwardii 1 Nitzschia gracilis 52 Nitzschia homburgiensis 7 3 1 1 Nitzschia paleacea 7 1 Nitzschia kleinteichiana 1 74 151 3 8 9 1 Nitzschia soratensis 18 1 Orthoseira roeseana 2 1 Pinnularia australoborealis 1 3 Pinnularia australodivergens 2 1 Pinnularia australomicrostauron 1 13 21 1 40 1 1 11 1 1 Pinnularia australoschoenfelderi 9 4 56 12 60 39 3 10 2 Pinnularia australorabenhorstii 1 Pinnularia australoshetlandica 1 1 1 Pinnularia borealis var. pseudolanceolata 1 Pinnularia borealis  203 8 1 27 34 296 49 44 85 53 Pinnularia microstauroides 3 6 3 Pinnularia subaltiplanensis  1 3 1 31 1 24 3 Pinnularia subantarctica var. elongata 1 2 101 84 3 8 44 42 Pinnularia subcarteri 2 Placoneis australis 1 1 Planothidium australe 10 1 1 12 Planothidium lanceolatum 9 3 2 10 Planothidium aff. renei 3 Planothidium rostrolanceolatum 2 16 Psammothidium germainii 19 1 7 1 1 50 2 1 Psammothidium germainioides 4 27 Psammothidium manguinii 3 2 2 Psammothidium papilio 1 1 1 1 1 19 Psammothidium rostrogermainii 6 3 22 Psammothidium subatomoides 1 1 Sellaphora antarctica 14 2 1 1 1 Stauroforma cf. inermis 1 33 1 2 1 Stauroneis cf. acidojarensis 1 Stauroneis huskvikensis 2 1 Stauroneis latistauros 1 1 Stauroneis aff. pseudoschimanskii  1 Staurosirella frigida 1 3 Staurosira pottiezii 8 215 134 1 1 5 6 6 3 ##### Sheet/List 2 ##### Soil1 Soil2 Soil3 Soil4 Soil5 Soil6 Soil7 Soil8 Soil9 Soil10 valves % genus species % Pinnularia borealis  203 8 1 27 34 296 49 44 85 53 800 20.00% 5 most abundant 2155 54% Achnanthes coarctata  Pinnularia 12 50% Luticola muticopsis  1 62 88 3 2 9 70 162 397 9.93% Achnanthes muelleri Luticola 11 46% Staurosira pottiezii 8 215 134 1 1 5 6 6 376 9.40% 59 species less than one 1 % Achnanthes taylorensis Humidophila 9 38% Luticola truncata 1 19 153 62 62 297 7.43% Brachysira minor Psammothidium 6 25% Pinnularia subantarctica var. elongata 1 2 101 84 3 8 44 42 285 7.13% Eunotia pseudopaludosa Hantzschia 5 21% Nitzschia kleinteichiana 1 74 151 3 8 9 246 6.15% Eunotia ralitsae Muelleria 5 21% Pinnularia australoschoenfelderi 9 4 56 12 60 39 3 10 2 195 4.88% Fragilaria cf. parva Nitzschia 5 21% Eunotia pseudopaludosa 11 5 143 4 163 4.08% Gomphonema maritimo-antarcticum Achnanthes 3 13% Humidophila australoshetlandica 133 8 1 5 1 1 9 158 3.95% Halamphora oligotraphenta Chamaepinnularia 3 13% Achnanthes taylorensis 93 93 2.33% Hantzschia abundans  Planothidium 3 13% Pinnularia australomicrostauron 1 13 21 1 40 1 1 11 1 90 2.25% Hantzschia amphioxys Eunotia 2 8% Psammothidium germainii 19 1 7 1 1 50 2 81 2.03% Hantzschia hyperaustralis  Navicula 2 8% Pinnularia subaltiplanensis  1 3 1 31 1 24 3 64 1.60% Hantzschia incognita Stauroneis 2 8% Luticola permuticopsis 10 14 35 59 1.48% Hantzschiaacuticapitata  Brachysira 1 4% Chamaepinnularia krookiformis 2 1 44 2 8 1 58 1.45% Humidophila aff. nienta Fragilaria 1 4% Luticola sp. 34 16 50 1.25% Humidophila arcuata Gomphonema 1 4% Gomphonema maritimo-antarcticum 2 13 22 6 2 3 48 1.20% Humidophila australis Halamphora 1 4% Humidophila tabellariaeformis 1 1 31 4 3 3 43 1.08% Humidophila australoshetlandica Microcostatus 1 4% Luticola subcrozetensis 1 1 39 1 42 1.05% Humidophila inconspicua Orthoseira 1 4% Stauroforma cf. inermis 1 33 1 2 1 38 0.95% Humidophila keiliorum Placoneis 1 4% Hantzschia amphioxys 1 4 1 3 1 1 21 1 1 34 0.85% Humidophila sceppacuerciae Sellaphora 1 4% Humidophila vojtajarosikii 10 23 1 34 0.85% Humidophila tabellariaeformis Stauroforma 1 4% Psammothidium germainioides 4 27 31 0.78% Humidophila vojtajarosikii Staurosira 1 4% Psammothidium rostrogermainii 6 3 22 31 0.78% Chamaepinnularia gerlachei Staurosirella 1 4% Brachysira minor 30 30 0.75% Chamaepinnularia krookiformis 24 79 Nitzschia soratensis 18 18 0.45% Chamaepinnularia krookii Sellaphora antarctica 14 2 1 1 18 0.45% Luticola australomutica Humidophila australis 1 1 10 3 15 0.38% Luticola austroatlantica Planothidium lanceolatum 9 3 2 14 0.35% Luticola doliiformis  Fragilaria cf. parva 1 6 4 1 12 0.30% Luticola muticopsis  Halamphora oligotraphenta 2 9 1 12 0.30% Luticola permuticopsis Pinnularia microstauroides 3 6 3 12 0.30% Luticola pusilla Planothidium australe 10 1 1 12 0.30% Luticola sp. Nitzschia homburgiensis 7 3 1 11 0.28% Luticola subcrozetensis Humidophila keiliorum 1 4 5 10 0.25% Luticola truncata Eunotia ralitsae 7 1 1 9 0.23% Luticola vermuelenii Luticola austroatlantica 1 1 4 2 8 0.20% Luticolacf. katkae Nitzschia paleacea 7 1 8 0.20% Microcostatus australoshetlandicus Humidophila sceppacuerciae 2 4 1 7 0.18% Muelleria aequistriata Muelleria algida 1 6 7 0.18% Muelleria aff. kristinae Psammothidium manguinii 3 2 2 7 0.18% Muelleria aff. nogae Humidophila arcuata 6 6 0.15% Muelleria algida Psammothidium papilio 1 1 1 1 1 5 0.13% Muelleria sabbei Chamaepinnularia gerlachei 1 2 1 4 0.10% Navicula australoshetlandica Luticola pusilla 2 1 1 4 0.10% Navicula bicephaloides Navicula bicephaloides 3 1 4 0.10% Nitzschia homburgiensis Pinnularia australoborealis 1 3 4 0.10% Nitzschia kleinteichiana Humidophila inconspicua 3 3 0.08% Nitzschia paleacea Luticola australomutica 1 2 3 0.08% Nitzschia soratensis Microcostatus australoshetlandicus 2 1 3 0.08% Orthoseira roeseana Muelleria sabbei 3 3 0.08% Pinnularia australoborealis Orthoseira roeseana 2 1 3 0.08% Pinnularia australodivergens Chamaepinnularia krookii 2 2 0.05% Pinnularia australomicrostauron Navicula australoshetlandica 1 1 2 0.05% Pinnularia australorabenhorstii Pinnularia australodivergens 2 2 0.05% Pinnularia australoshetlandica Pinnularia australoshetlandica 1 1 2 0.05% Pinnularia australoschoenfelderi Pinnularia subcarteri 2 2 0.05% Pinnularia borealis  Placoneis australis 1 1 2 0.05% Pinnularia borealis var. pseudolanceolata Planothidium rostrolanceolatum 2 2 0.05% Pinnularia microstauroides Stauroneis huskvikensis 2 2 0.05% Pinnularia subaltiplanensis  Stauroneis latistauros 1 1 2 0.05% Pinnularia subantarctica var. elongata Achnanthes coarctata  1 1 0.03% Pinnularia subcarteri Achnanthes muelleri 1 1 0.03% Placoneis australis Hantzschia abundans  1 1 0.03% Planothidium australe Hantzschiaacuticapitata  1 1 0.03% Planothidium lanceolatum Hantzschia hyperaustralis  1 1 0.03% Planothidium rostrolanceolatum Hantzschia incognita 1 1 0.03% Psammothidium germainii Humidophila aff. nienta 1 1 0.03% Psammothidium germainioides Luticola doliiformis  1 1 0.03% Psammothidium manguinii Luticolacf. katkae 1 1 0.03% Psammothidium papilio Luticola vermuelenii 1 1 0.03% Psammothidium rostrogermainii Muelleria aequistriata 1 1 0.03% Psammothidium subatomoides Muelleria aff. kristinae 1 1 0.03% Sellaphora antarctica Muelleria aff. nogae 1 1 0.03% Stauroforma cf. inermis Pinnularia australorabenhorstii 1 1 0.03% Stauroneis huskvikensis Pinnularia borealis var. pseudolanceolata 1 1 0.03% Stauroneis latistauros Psammothidium subatomoides 1 1 0.03% Staurosira pottiezii Staurosirella frigida 1 1 0.03% Staurosirella frigida 400 400 400 400 400 400 400 400 400 400 4000 100.00% ##### Sheet/List 3 ##### Lake genus species Fragilaria cf. parva 238 59.50% most 5 abundant 346.00 86.50% Fragilaria cf. parva Nitzchia 4 Nitzschia gracilis 52 13.00% Brachysira minor Planothidium 4 Gomphonema maritimo-antarcticum 21 5.25% 24 species less than 1 % Gomphonema maritimo-antarcticum Chamaepinnularia 3 Psammothidium papilio 19 4.75% Chamaepinnularia australomediocris Pinnularia 3 Planothidium rostrolanceolatum 16 4.00% Chamaepinnularia gerlachei Psammothidium 3 Planothidium australe 12 3.00% Chamaepinnularia krookiformis Stauroneis 3 Planothidium lanceolatum 10 2.50% Luticola muticopsis  Luticola 2 Chamaepinnularia krookiformis 3 0.75% Luticola subcrozetensis Navicula 2 Planothidium aff. renei 3 0.75% Microcostatus naumannii Fragilaria 1 Staurosirella frigida 3 0.75% Navicula gregaria Brachysira 1 Staurosira pottiezii 3 0.75% Navicula romanedwardii Gomphonema 1 Brachysira minor 3 0.75% Nitzschia gracilis Microcostatus 1 Chamaepinnularia australomediocris 3 0.75% Nitzschia homburgiensis Sellaphora 1 Chamaepinnularia gerlachei 3 0.75% Nitzschia kleinteichiana Staurosira 1 Luticola muticopsis  3 0.75% Nitzschia soratensis Staurosirella 1 Luticola subcrozetensis 3 0.75% Pinnularia australodivergens 31 Microcostatus naumannii 3 0.75% Pinnularia australomicrostauron Navicula gregaria 3 0.75% Pinnularia australoshetlandica Navicula romanedwardii 3 0.75% Planothidium aff. renei Nitzschia homburgiensis 3 0.75% Planothidium australe Nitzschia kleinteichiana 3 0.75% Planothidium lanceolatum Nitzschia soratensis 3 0.75% Planothidium rostrolanceolatum Pinnularia australodivergens 3 0.75% Psammothidium germainii Pinnularia australomicrostauron 3 0.75% Psammothidium papilio Pinnularia australoshetlandica 3 0.75% Psammothidium subatomoides Psammothidium germainii 3 0.75% Sellaphora antarctica Psammothidium subatomoides 3 0.75% Stauroneis aff. pseudoschimanskii  Sellaphora antarctica 3 0.75% Stauroneis cf. acidojarensis Stauroneis cf. acidojarensis 3 0.75% Stauroneis huskvikensis Stauroneis huskvikensis 3 0.75% Staurosira pottiezii Stauroneis aff. pseudoschimanskii  1 0.25% Staurosirella frigida 438 110% ##### Sheet/List 4 ##### Full Only soils Only lake Achnanthes coarctata  Achnanthes coarctata  Stauroneis aff. pseudoschimanskii  Achnanthes muelleri Achnanthes muelleri Planothidium aff. renei Achnanthes taylorensis Achnanthes taylorensis Stauroneis cf. acidojarensis Brachysira minor Eunotia pseudopaludosa Navicula gregaria Eunotia pseudopaludosa Eunotia ralitsae Navicula romanedwardii Eunotia ralitsae Halamphora oligotraphenta Nitzschia gracilis Fragilaria cf. parva Hantzschia abundans  Microcostatus naumannii Gomphonema maritimo-antarcticum Hantzschia amphioxys Chamaepinnularia australomediocris Halamphora oligotraphenta Hantzschiaacuticapitata  Hantzschia abundans  Hantzschia hyperaustralis  Hantzschia amphioxys Hantzschia incognita Hantzschiaacuticapitata  Humidophila aff. nienta Hantzschia hyperaustralis  Humidophila australis Hantzschia incognita Humidophila australoshetlandica Humidophila aff. nienta Humidophila arcuata Humidophila australis Humidophila inconspicua Humidophila australoshetlandica Humidophila keiliorum Humidophila arcuata Humidophila sceppacuerciae Humidophila inconspicua Humidophila tabellariaeformis Humidophila keiliorum Humidophila vojtajarosikii Humidophila sceppacuerciae Chamaepinnularia krookii Humidophila tabellariaeformis Luticola australomutica Humidophila vojtajarosikii Luticola austroatlantica Chamaepinnularia australomediocris Luticola doliiformis  Chamaepinnularia gerlachei Luticolacf. katkae Chamaepinnularia krookiformis Luticola permuticopsis Chamaepinnularia krookii Luticola pusilla Luticola australomutica Luticola truncata Luticola austroatlantica Luticola sp. Luticola doliiformis  Luticola vermuelenii Luticolacf. katkae Microcostatus australoshetlandicus Luticola muticopsis  Muelleria aequistriata Luticola permuticopsis Muelleria algida Luticola pusilla Muelleria aff. kristinae Luticola subcrozetensis Muelleria aff. nogae Luticola truncata Muelleria sabbei Luticola sp. Navicula australoshetlandica Luticola vermuelenii Navicula bicephaloides Microcostatus australoshetlandicus Nitzschia paleacea Microcostatus naumannii Orthoseira roeseana Muelleria aequistriata Pinnularia australoborealis Muelleria algida Pinnularia australoschoenfelderi Muelleria aff. kristinae Pinnularia australorabenhorstii Muelleria aff. nogae Pinnularia borealis var. pseudolanceolata Muelleria sabbei Pinnularia borealis  Navicula australoshetlandica Pinnularia microstauroides Navicula bicephaloides Pinnularia subaltiplanensis  Navicula gregaria Pinnularia subantarctica var. elongata Navicula romanedwardii Pinnularia subcarteri Nitzschia gracilis Placoneis australis Nitzschia homburgiensis Psammothidium germainioides Nitzschia paleacea Psammothidium manguinii Nitzschia kleinteichiana Psammothidium rostrogermainii Nitzschia soratensis Stauroforma cf. inermis Orthoseira roeseana Stauroneis latistauros Pinnularia australoborealis Pinnularia australodivergens Pinnularia australomicrostauron Pinnularia australoschoenfelderi Pinnularia australorabenhorstii Pinnularia australoshetlandica Pinnularia borealis var. pseudolanceolata Pinnularia borealis  Pinnularia microstauroides Pinnularia subaltiplanensis  Pinnularia subantarctica var. elongata Pinnularia subcarteri Placoneis australis Planothidium australe Planothidium lanceolatum Planothidium aff. renei Planothidium rostrolanceolatum Psammothidium germainii Psammothidium germainioides Psammothidium manguinii Psammothidium papilio Psammothidium rostrogermainii Psammothidium subatomoides Sellaphora antarctica Stauroforma cf. inermis Stauroneis cf. acidojarensis Stauroneis huskvikensis Stauroneis latistauros Stauroneis aff. pseudoschimanskii  Staurosirella frigida Staurosira pottiezii ##### Sheet/List 5 ##### Species biogeography Humidophila arcuata AM/SA/MA/A C cosmopolitan Achnanthes coarctata  C A antarctic Halamphora oligotraphenta C MA maritime-antarctic Hantzschia abundans  C SA sub-antarctic Hantzschia amphioxys C AM sout-american Chamaepinnularia krookiformis C U unknown Chamaepinnularia krookii C Luticola permuticopsis C Microcostatus naumannii C Navicula gregaria C Nitzschia gracilis C Nitzschia homburgiensis C Nitzschia paleacea C Nitzschia soratensis C Orthoseira roeseana C Pinnularia borealis  C Planothidium lanceolatum C Planothidium rostrolanceolatum C Psammothidium manguinii C Psammothidium subatomoides C Brachysira minor MA Eunotia ralitsae MA Gomphonema maritimo-antarcticum MA Hantzschiaacuticapitata  MA Hantzschia hyperaustralis  MA Hantzschia incognita MA Humidophila australis MA Humidophila australoshetlandica MA Humidophila keiliorum MA Humidophila sceppacuerciae MA Humidophila tabellariaeformis MA Humidophila vojtajarosikii MA Chamaepinnularia australomediocris MA Chamaepinnularia gerlachei MA Luticola australomutica MA Luticola austroatlantica MA Luticola doliiformis  MA Luticola pusilla MA Luticola truncata MA Luticola vermuelenii MA Microcostatus australoshetlandicus MA Muelleria aequistriata MA Muelleria algida MA Muelleria sabbei MA Navicula australoshetlandica MA Navicula romanedwardii MA Nitzschia kleinteichiana MA Pinnularia australoborealis MA Pinnularia australodivergens MA Pinnularia australomicrostauron MA Pinnularia australoschoenfelderi MA Pinnularia australorabenhorstii MA Pinnularia austroshetlandica MA Pinnularia borealis var. pseudolanceolata MA Pinnularia microstauroides MA Pinnularia subaltiplanensis  MA Pinnularia subcarteri MA Placoneis australis MA Planothidium australe MA Psammothidium germainioides MA Psammothidium papilio MA Psammothidium rostrogermainii MA Sellaphora antarctica MA Stauroneis latistauros MA Staurosirella frigida MA Staurosira pottiezii MA Achnanthes taylorensis MA/A Humidophila inconspicua MA/A Eunotia pseudopaludosa SA/MA Luticola muticopsis  SA/MA Luticola subcrozetensis SA/MA Navicula bicephaloides SA/MA Pinnularia subantarctica var. elongata SA/MA Psammothidium germainii SA/MA Stauroneis huskvikensis SA/MA Achnanthes muelleri SA/MA/A Fragilaria cf. parva U Humidophila aff. nienta U Luticolacf. katkae U Luticola sp. U Muelleria aff. kristinae U Muelleria aff. nogae U Planothidium aff. renei U Stauroforma cf. inermis U Stauroneis cf. acidojarensis U Stauroneis aff. pseudoschimanskii  U ##### Sheet/List 6 ##### Sample Location date sample type/habitat/exact location GPS m a.s.l. vegetation biotic class salt class remarks Ardley soil1 Ardley Island 2/3/2019 slightly wet soil under the soil crust with dead mosses "S 62 12 39,8 W 58 56 17,1" 39 "moss, Usnea" 1 0 some skuas nearby Ardley soil2 Ardley Island 2/3/2019 slightly wet soil from a rock crack "S 62 12 39,9 W 58 56 18,0" 35 moss 1 0 sheltered Ardley soil3 Ardley Island 2/3/2019 wet soil next to a seepage "S 62 12 41,5 W 58 56 07,5" 27 moss 1 0 Ardley soil4 Ardley Island 2/3/2019 wet soil in a slope "S 62 12 42,8 W 58 55 49,3" 27 "dead moss, Usnea" 1 0 Ardley soil5 Ardley Island 2/3/2019 wet soil in a penquin colony "S 62 12 44,4 W 58 55 16,1" 10 "Prasiola, moss" 2 1 strongly affected by animals Ardley soil6 Ardley Island 2/3/2019 slightly wet soil from a hill above the penquin colony "S 62 12 42,4 W 58 55 39,2" 40 "moss, Usnea, Deschampsia antarctica" 0 0 "not sheltered, strong wind from the sea" Ardley soil7 Ardley Island 2/3/2019 dry soil near Lake 1 "S 62 12 47,2 W 58 56 26,9" 2 soil crust with lichens and dead mosses 0 1 Ardley soil8 Ardley Island 2/3/2019 dry soil from an abandoned Penquin rookery "S 62 12 34,1 W 58 56 05,1" 3 "Prasiola, moss" 2 1 in front of the red Ballve hut Ardley soil9 Ardley Island 2/3/2019 wet soil in a penquin colony "S 62 12 38,6 W 58 55 42,0" 4 "Prasiola, moss" 2 1 strongly affected by animals Ardley soil10 Ardley Island 2/3/2019 wet soil next to a pool in the penquin colony "S 62 12 39,2 W 58 55 26,9" 10 "Prasiola, moss" 2 1 "strongly affected by animals, empty penguin eggs"