Abundance and variability of microorganisms and transparent exopolymer particles across the ice-water interface of melting first-year sea ice in the Laptev Sea (Arctic)
The distribution and abundance of transparent exopolymer particles (TEP) was determined in and below pack ice of the Laptev Sea from July to September 1995. Samples were collected from the lowermost 10 cm of ice floes and at 10 cm below the ice–water interface. Abundance of bacteria, protists and TE...
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Online Access: | https://oceanrep.geomar.de/id/eprint/12243/ https://oceanrep.geomar.de/id/eprint/12243/1/fulltext.pdf https://doi.org/10.1007/s002270000396 |
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ftoceanrep:oai:oceanrep.geomar.de:12243 2023-05-15T14:26:11+02:00 Abundance and variability of microorganisms and transparent exopolymer particles across the ice-water interface of melting first-year sea ice in the Laptev Sea (Arctic) Krembs, C. Engel, Anja 2001 text https://oceanrep.geomar.de/id/eprint/12243/ https://oceanrep.geomar.de/id/eprint/12243/1/fulltext.pdf https://doi.org/10.1007/s002270000396 en eng Springer https://oceanrep.geomar.de/id/eprint/12243/1/fulltext.pdf Krembs, C. and Engel, A. (2001) Abundance and variability of microorganisms and transparent exopolymer particles across the ice-water interface of melting first-year sea ice in the Laptev Sea (Arctic). Marine Biology, 138 (1). pp. 173-185. DOI 10.1007/s002270000396 <https://doi.org/10.1007/s002270000396>. doi:10.1007/s002270000396 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2001 ftoceanrep https://doi.org/10.1007/s002270000396 2023-04-07T15:00:40Z The distribution and abundance of transparent exopolymer particles (TEP) was determined in and below pack ice of the Laptev Sea from July to September 1995. Samples were collected from the lowermost 10 cm of ice floes and at 10 cm below the ice–water interface. Abundance of bacteria, protists and TEP was determined, and the sea ice–water boundary layer was characterized using temperature, salinity and molecular viscous shear stress. TEP, with a distinct size distribution signal, were found in highest concentrations inside the sea ice, ranging from not detectable to 16 cm2 l−1 (median: 2.9 cm2 l−1). In the water, concentrations were one order of magnitude lower, ranged from below detection to 2.7 cm2 l−1 (median: 0.2 cm2 l−1) and decreased after the middle of August, whereas abundances of autotrophic flagellates (AF), diatoms, heterotrophic flagellates (HF) and ciliates increased. The abundance of TEP decreased with its size in all samples following a power law relationship. The relation of TEP to the microbial community differed between the sea ice and water, being positively correlated with bacteria and diatoms in the ice and negatively correlated with HF in the sea water. The presence of a pycnocline significantly influenced the abundance of organisms, diatom composition and TEP concentrations. Pennate diatoms dominated by Nitzschia frigida were most abundant inside the ice. Though bacteria have the potential to produce exopolymeric substances (EPS), the results of this study indicate that the majority of TEP at the ice–water interface in first-year Arctic summer pack ice are produced by diatoms. Article in Journal/Newspaper Arctic Arctic laptev Laptev Sea Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Laptev Sea Marine Biology 138 1 173 185 |
institution |
Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
The distribution and abundance of transparent exopolymer particles (TEP) was determined in and below pack ice of the Laptev Sea from July to September 1995. Samples were collected from the lowermost 10 cm of ice floes and at 10 cm below the ice–water interface. Abundance of bacteria, protists and TEP was determined, and the sea ice–water boundary layer was characterized using temperature, salinity and molecular viscous shear stress. TEP, with a distinct size distribution signal, were found in highest concentrations inside the sea ice, ranging from not detectable to 16 cm2 l−1 (median: 2.9 cm2 l−1). In the water, concentrations were one order of magnitude lower, ranged from below detection to 2.7 cm2 l−1 (median: 0.2 cm2 l−1) and decreased after the middle of August, whereas abundances of autotrophic flagellates (AF), diatoms, heterotrophic flagellates (HF) and ciliates increased. The abundance of TEP decreased with its size in all samples following a power law relationship. The relation of TEP to the microbial community differed between the sea ice and water, being positively correlated with bacteria and diatoms in the ice and negatively correlated with HF in the sea water. The presence of a pycnocline significantly influenced the abundance of organisms, diatom composition and TEP concentrations. Pennate diatoms dominated by Nitzschia frigida were most abundant inside the ice. Though bacteria have the potential to produce exopolymeric substances (EPS), the results of this study indicate that the majority of TEP at the ice–water interface in first-year Arctic summer pack ice are produced by diatoms. |
format |
Article in Journal/Newspaper |
author |
Krembs, C. Engel, Anja |
spellingShingle |
Krembs, C. Engel, Anja Abundance and variability of microorganisms and transparent exopolymer particles across the ice-water interface of melting first-year sea ice in the Laptev Sea (Arctic) |
author_facet |
Krembs, C. Engel, Anja |
author_sort |
Krembs, C. |
title |
Abundance and variability of microorganisms and transparent exopolymer particles across the ice-water interface of melting first-year sea ice in the Laptev Sea (Arctic) |
title_short |
Abundance and variability of microorganisms and transparent exopolymer particles across the ice-water interface of melting first-year sea ice in the Laptev Sea (Arctic) |
title_full |
Abundance and variability of microorganisms and transparent exopolymer particles across the ice-water interface of melting first-year sea ice in the Laptev Sea (Arctic) |
title_fullStr |
Abundance and variability of microorganisms and transparent exopolymer particles across the ice-water interface of melting first-year sea ice in the Laptev Sea (Arctic) |
title_full_unstemmed |
Abundance and variability of microorganisms and transparent exopolymer particles across the ice-water interface of melting first-year sea ice in the Laptev Sea (Arctic) |
title_sort |
abundance and variability of microorganisms and transparent exopolymer particles across the ice-water interface of melting first-year sea ice in the laptev sea (arctic) |
publisher |
Springer |
publishDate |
2001 |
url |
https://oceanrep.geomar.de/id/eprint/12243/ https://oceanrep.geomar.de/id/eprint/12243/1/fulltext.pdf https://doi.org/10.1007/s002270000396 |
geographic |
Arctic Laptev Sea |
geographic_facet |
Arctic Laptev Sea |
genre |
Arctic Arctic laptev Laptev Sea Sea ice |
genre_facet |
Arctic Arctic laptev Laptev Sea Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/12243/1/fulltext.pdf Krembs, C. and Engel, A. (2001) Abundance and variability of microorganisms and transparent exopolymer particles across the ice-water interface of melting first-year sea ice in the Laptev Sea (Arctic). Marine Biology, 138 (1). pp. 173-185. DOI 10.1007/s002270000396 <https://doi.org/10.1007/s002270000396>. doi:10.1007/s002270000396 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s002270000396 |
container_title |
Marine Biology |
container_volume |
138 |
container_issue |
1 |
container_start_page |
173 |
op_container_end_page |
185 |
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1766298662586023936 |