Distribution and composition of dissolved extracellular polymeric substances (EPS) in Antarctic sea ice
Concentrations and chemical composition of carbohydrates in dissolved organic carbon (DOC) and in extracellular polymeric substances (EPS) from brines, ice cores, gap layers in sea ice and associated surface waters were determined during 2004 and 2006 in the Weddell Sea, Antarctica. High levels of s...
Published in: | Marine Ecology Progress Series |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2010
|
Subjects: | |
Online Access: | https://ddd.uab.cat/record/158345 |
id |
ftuabarcelonapb:oai:ddd.uab.cat:158345 |
---|---|
record_format |
openpolar |
spelling |
ftuabarcelonapb:oai:ddd.uab.cat:158345 2024-09-09T19:02:17+00:00 Distribution and composition of dissolved extracellular polymeric substances (EPS) in Antarctic sea ice Underwood, Graham J. C. Fietz, Susanne Papadimitriou, Stathys Thomas, David N. Dieckmann, Gerhard S. 2010 application/pdf https://ddd.uab.cat/record/158345 eng eng Marine Ecology Progress Series Vol. 404 (April 2010), p. 1-19 https://ddd.uab.cat/record/158345 urn:10.3354/meps08557 urn:oai:ddd.uab.cat:158345 urn:recercauab:ARE-68950 urn:scopus_id:77954112380 urn:wos_id:000277230100001 urn:altmetric_id:50641289 urn:oai:egreta.uab.cat:publications/b7ba786a-de83-4553-a9de-7372849a5f17 open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ Antarctic Brine Carbohydrates Dissolved organic carbon DOC EPS Extracellular polymeric substances Microalgae Sea ice Article 2010 ftuabarcelonapb 2024-08-06T14:30:48Z Concentrations and chemical composition of carbohydrates in dissolved organic carbon (DOC) and in extracellular polymeric substances (EPS) from brines, ice cores, gap layers in sea ice and associated surface waters were determined during 2004 and 2006 in the Weddell Sea, Antarctica. High levels of spatial heterogeneity were a common feature in these habitats, with DOC concentrations ranging from 45 to 669 µmol C kg-1. The highest concentrations of DOC and carbohydrate were measured in bulk sea-ice brines. Concentrations of dissolved carbohydrate (>8 kDa in size) varied between 31 and 255 µmol C kg-1 (glucose-carbon equivalent), and consisted of ca. 40% of the DOC in melted ice cores, and 10 to 20% of the DOC in ice brines. Dissolved carbohydrate and DOC concentrations were significantly correlated to chl a. Carbohydrate present as EPS (determined by selective alcohol precipitation) made up >68% of dissolved carbohydrates in all sea ice habitats. There were significant differences in concentration and relative importance of different EPS size fractions, and in the uronic acid content and monosaccharide composition (especially for glucose contribution), of different sea ice habitats, in relation to chl a concentrations, and between the 2 sampling cruises. High algal biomass was associated with greater relative abundance of glucose-rich EPS. Fractionation of EPS on the basis of solubility found that the least soluble EPS fraction contained substantial amounts of uronic acids and higher proportions of mannose, xylose, fucose and rhamnose than the more soluble EPS fractions. This relatively insoluble EPS fraction had characteristics that could contribute to a hydrophobic and structured microenvironment surrounding cells. EPS thus modify the local environment in sea ice brine channels, and form a chemically diverse source of DOC to the water column upon ice melt. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Weddell Sea Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB Antarctic Weddell Weddell Sea Marine Ecology Progress Series 404 1 19 |
institution |
Open Polar |
collection |
Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB |
op_collection_id |
ftuabarcelonapb |
language |
English |
topic |
Antarctic Brine Carbohydrates Dissolved organic carbon DOC EPS Extracellular polymeric substances Microalgae Sea ice |
spellingShingle |
Antarctic Brine Carbohydrates Dissolved organic carbon DOC EPS Extracellular polymeric substances Microalgae Sea ice Underwood, Graham J. C. Fietz, Susanne Papadimitriou, Stathys Thomas, David N. Dieckmann, Gerhard S. Distribution and composition of dissolved extracellular polymeric substances (EPS) in Antarctic sea ice |
topic_facet |
Antarctic Brine Carbohydrates Dissolved organic carbon DOC EPS Extracellular polymeric substances Microalgae Sea ice |
description |
Concentrations and chemical composition of carbohydrates in dissolved organic carbon (DOC) and in extracellular polymeric substances (EPS) from brines, ice cores, gap layers in sea ice and associated surface waters were determined during 2004 and 2006 in the Weddell Sea, Antarctica. High levels of spatial heterogeneity were a common feature in these habitats, with DOC concentrations ranging from 45 to 669 µmol C kg-1. The highest concentrations of DOC and carbohydrate were measured in bulk sea-ice brines. Concentrations of dissolved carbohydrate (>8 kDa in size) varied between 31 and 255 µmol C kg-1 (glucose-carbon equivalent), and consisted of ca. 40% of the DOC in melted ice cores, and 10 to 20% of the DOC in ice brines. Dissolved carbohydrate and DOC concentrations were significantly correlated to chl a. Carbohydrate present as EPS (determined by selective alcohol precipitation) made up >68% of dissolved carbohydrates in all sea ice habitats. There were significant differences in concentration and relative importance of different EPS size fractions, and in the uronic acid content and monosaccharide composition (especially for glucose contribution), of different sea ice habitats, in relation to chl a concentrations, and between the 2 sampling cruises. High algal biomass was associated with greater relative abundance of glucose-rich EPS. Fractionation of EPS on the basis of solubility found that the least soluble EPS fraction contained substantial amounts of uronic acids and higher proportions of mannose, xylose, fucose and rhamnose than the more soluble EPS fractions. This relatively insoluble EPS fraction had characteristics that could contribute to a hydrophobic and structured microenvironment surrounding cells. EPS thus modify the local environment in sea ice brine channels, and form a chemically diverse source of DOC to the water column upon ice melt. |
format |
Article in Journal/Newspaper |
author |
Underwood, Graham J. C. Fietz, Susanne Papadimitriou, Stathys Thomas, David N. Dieckmann, Gerhard S. |
author_facet |
Underwood, Graham J. C. Fietz, Susanne Papadimitriou, Stathys Thomas, David N. Dieckmann, Gerhard S. |
author_sort |
Underwood, Graham J. C. |
title |
Distribution and composition of dissolved extracellular polymeric substances (EPS) in Antarctic sea ice |
title_short |
Distribution and composition of dissolved extracellular polymeric substances (EPS) in Antarctic sea ice |
title_full |
Distribution and composition of dissolved extracellular polymeric substances (EPS) in Antarctic sea ice |
title_fullStr |
Distribution and composition of dissolved extracellular polymeric substances (EPS) in Antarctic sea ice |
title_full_unstemmed |
Distribution and composition of dissolved extracellular polymeric substances (EPS) in Antarctic sea ice |
title_sort |
distribution and composition of dissolved extracellular polymeric substances (eps) in antarctic sea ice |
publishDate |
2010 |
url |
https://ddd.uab.cat/record/158345 |
geographic |
Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Sea ice Weddell Sea |
op_relation |
Marine Ecology Progress Series Vol. 404 (April 2010), p. 1-19 https://ddd.uab.cat/record/158345 urn:10.3354/meps08557 urn:oai:ddd.uab.cat:158345 urn:recercauab:ARE-68950 urn:scopus_id:77954112380 urn:wos_id:000277230100001 urn:altmetric_id:50641289 urn:oai:egreta.uab.cat:publications/b7ba786a-de83-4553-a9de-7372849a5f17 |
op_rights |
open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ |
container_title |
Marine Ecology Progress Series |
container_volume |
404 |
container_start_page |
1 |
op_container_end_page |
19 |
_version_ |
1809816451505192960 |