Dissolved extracellular polymeric substances (dEPS) dynamics and bacterial growth during sea ice formation in an ice tank study
Extracellular polymeric substances (EPS) are known to help microorganisms to survive under extreme conditions in sea ice. High concentrations of EPS are reported in sea ice from both poles; however, production and dynamics of EPS during sea ice formation have been little studied to date. This invest...
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ftunivessex:oai:repository.essex.ac.uk:5926 2023-05-15T18:02:01+02:00 Dissolved extracellular polymeric substances (dEPS) dynamics and bacterial growth during sea ice formation in an ice tank study Aslam, Shazia N Underwood, Graham JC Kaartokallio, Hermanni Norman, Louiza Autio, Riitta Fischer, Michael Kuosa, Harri Dieckmann, Gerhard S Thomas, David N 2012-05 http://repository.essex.ac.uk/5926/ unknown Springer Science and Business Media LLC Aslam, Shazia N and Underwood, Graham JC and Kaartokallio, Hermanni and Norman, Louiza and Autio, Riitta and Fischer, Michael and Kuosa, Harri and Dieckmann, Gerhard S and Thomas, David N (2012) 'Dissolved extracellular polymeric substances (dEPS) dynamics and bacterial growth during sea ice formation in an ice tank study.' Polar Biology, 35 (5). pp. 661-676. ISSN 0722-4060 GC Oceanography QH Natural history QH301 Biology QR Microbiology Article PeerReviewed 2012 ftunivessex 2022-08-18T22:39:13Z Extracellular polymeric substances (EPS) are known to help microorganisms to survive under extreme conditions in sea ice. High concentrations of EPS are reported in sea ice from both poles; however, production and dynamics of EPS during sea ice formation have been little studied to date. This investigation followed the production and partitioning of existing and newly formed dissolved organic matter (DOM) including dissolved carbohydrates (dCHO), dissolved uronic acids (dUA) and dissolved EPS (dEPS), along with bacterial abundances during early stages of ice formation. Sea ice was formed from North Sea water with (A) ambient DOM (NSW) and (B) with additional algal-derived DOM (ADOM) in a 6d experiment in replicated mesocosms. In ADOM seawater, total bacterial numbers (TBN) increased throughout the experiment, whereas bacterial growth occurred for 5d only in the NSW seawater. TBN progressively decreased within developing sea ice but with a 2-fold greater decline in NSW compared to ADOM ice. There were significant increases in the concentrations of dCHO in ice. Percentage contribution of dEPS was highest (63%) in the colder, uppermost parts in ADOM ice suggesting the development of a cold-adapted community, producing dEPS possibly for cryo-protection and/or protection from high salinity brines. We conclude that in the early stages of ice formation, allochthonous organic matter was incorporated from parent seawater into sea ice and that once ice formation had established, there were significant changes in the concentrations and composition of dissolved organic carbon pool, resulting mainly from the production of autochthonous DOM by the bacteria. © 2011 Springer-Verlag. Article in Journal/Newspaper Polar Biology Sea ice University of Essex Research Repository Dua ENVELOPE(23.951,23.951,71.017,71.017) |
institution |
Open Polar |
collection |
University of Essex Research Repository |
op_collection_id |
ftunivessex |
language |
unknown |
topic |
GC Oceanography QH Natural history QH301 Biology QR Microbiology |
spellingShingle |
GC Oceanography QH Natural history QH301 Biology QR Microbiology Aslam, Shazia N Underwood, Graham JC Kaartokallio, Hermanni Norman, Louiza Autio, Riitta Fischer, Michael Kuosa, Harri Dieckmann, Gerhard S Thomas, David N Dissolved extracellular polymeric substances (dEPS) dynamics and bacterial growth during sea ice formation in an ice tank study |
topic_facet |
GC Oceanography QH Natural history QH301 Biology QR Microbiology |
description |
Extracellular polymeric substances (EPS) are known to help microorganisms to survive under extreme conditions in sea ice. High concentrations of EPS are reported in sea ice from both poles; however, production and dynamics of EPS during sea ice formation have been little studied to date. This investigation followed the production and partitioning of existing and newly formed dissolved organic matter (DOM) including dissolved carbohydrates (dCHO), dissolved uronic acids (dUA) and dissolved EPS (dEPS), along with bacterial abundances during early stages of ice formation. Sea ice was formed from North Sea water with (A) ambient DOM (NSW) and (B) with additional algal-derived DOM (ADOM) in a 6d experiment in replicated mesocosms. In ADOM seawater, total bacterial numbers (TBN) increased throughout the experiment, whereas bacterial growth occurred for 5d only in the NSW seawater. TBN progressively decreased within developing sea ice but with a 2-fold greater decline in NSW compared to ADOM ice. There were significant increases in the concentrations of dCHO in ice. Percentage contribution of dEPS was highest (63%) in the colder, uppermost parts in ADOM ice suggesting the development of a cold-adapted community, producing dEPS possibly for cryo-protection and/or protection from high salinity brines. We conclude that in the early stages of ice formation, allochthonous organic matter was incorporated from parent seawater into sea ice and that once ice formation had established, there were significant changes in the concentrations and composition of dissolved organic carbon pool, resulting mainly from the production of autochthonous DOM by the bacteria. © 2011 Springer-Verlag. |
format |
Article in Journal/Newspaper |
author |
Aslam, Shazia N Underwood, Graham JC Kaartokallio, Hermanni Norman, Louiza Autio, Riitta Fischer, Michael Kuosa, Harri Dieckmann, Gerhard S Thomas, David N |
author_facet |
Aslam, Shazia N Underwood, Graham JC Kaartokallio, Hermanni Norman, Louiza Autio, Riitta Fischer, Michael Kuosa, Harri Dieckmann, Gerhard S Thomas, David N |
author_sort |
Aslam, Shazia N |
title |
Dissolved extracellular polymeric substances (dEPS) dynamics and bacterial growth during sea ice formation in an ice tank study |
title_short |
Dissolved extracellular polymeric substances (dEPS) dynamics and bacterial growth during sea ice formation in an ice tank study |
title_full |
Dissolved extracellular polymeric substances (dEPS) dynamics and bacterial growth during sea ice formation in an ice tank study |
title_fullStr |
Dissolved extracellular polymeric substances (dEPS) dynamics and bacterial growth during sea ice formation in an ice tank study |
title_full_unstemmed |
Dissolved extracellular polymeric substances (dEPS) dynamics and bacterial growth during sea ice formation in an ice tank study |
title_sort |
dissolved extracellular polymeric substances (deps) dynamics and bacterial growth during sea ice formation in an ice tank study |
publisher |
Springer Science and Business Media LLC |
publishDate |
2012 |
url |
http://repository.essex.ac.uk/5926/ |
long_lat |
ENVELOPE(23.951,23.951,71.017,71.017) |
geographic |
Dua |
geographic_facet |
Dua |
genre |
Polar Biology Sea ice |
genre_facet |
Polar Biology Sea ice |
op_relation |
Aslam, Shazia N and Underwood, Graham JC and Kaartokallio, Hermanni and Norman, Louiza and Autio, Riitta and Fischer, Michael and Kuosa, Harri and Dieckmann, Gerhard S and Thomas, David N (2012) 'Dissolved extracellular polymeric substances (dEPS) dynamics and bacterial growth during sea ice formation in an ice tank study.' Polar Biology, 35 (5). pp. 661-676. ISSN 0722-4060 |
_version_ |
1766171675321171968 |