| Microphotographs of pennate diatoms residing within pore spaces at a depth of 112 cm in an ice core collected in March of 1999 after cooling from in situ temperature to -25°C: a) low magnification image showing ice texture, brine layers (B) and diatoms (D); b) damaged diatom cell in a pore with encroaching ice crystals and an empty pore space (P); c) diatom in a pore connected to a brine layer; d) two diatoms in an isolated pore; e) diatom in a pore with indications of amorphous transparent gel-like exopolymeric material; and f) diatom surrounded by an EPS matrix successfully stained with Alcian blue (at -2°C prior to chilling to -15°C). |
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