Diversity of cyanobacterial morphospecies identified in the studied mat samples. (a) A, Geitlerinema deflexum; B, Leptolyngbya antarctica; C, Leptolyngbya frigida; D, Phormidium priestleyi; E, Arthronema sp.; F, Schizothrix sp./Pseudophormidium sp.; G, Phormidium murrayi; H, Oscillatoria subproboscidea; I, Phormidium pseudopriestleyi. Bar, 10 μm. (b) A, Nostoc sp.; B, Nodularia harveyana; C, Calothrix sp.; D, Aphanocapsa cf. holastica; E, Aphanocapsa cf. hyalina; F, Chlorogoea sp.; G, Cyanosarcina sp.; H, Aphanothece sp. Bar, 10 μm.