High concentrations of exopolymeric substances in Arctic winter sea ice: implications for the polar ocean carbon cycle and cryoprotection of diatoms
Exopolymeric substances (EPS) produced by microorganisms play important roles in
various aquatic, porous, and extreme environments. Only recently has their occurrence in
sea ice been considered. We used macroscopic and microscopic approaches to study the
content and possible ecological role of EPS in wintertime fast ice near Barrow, Alaska (71°
20′ N, 156° 40′ W). Using Alcian blue staining of melted ice samples, we observed high
concentrations of EPS in all samples examined, ranging from 0.79 to 7.71 mg xanthan gum …
various aquatic, porous, and extreme environments. Only recently has their occurrence in
sea ice been considered. We used macroscopic and microscopic approaches to study the
content and possible ecological role of EPS in wintertime fast ice near Barrow, Alaska (71°
20′ N, 156° 40′ W). Using Alcian blue staining of melted ice samples, we observed high
concentrations of EPS in all samples examined, ranging from 0.79 to 7.71 mg xanthan gum …
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