Floating ice-algal aggregates below melting arctic sea ice.
During two consecutive cruises to the Eastern Central Arctic in late summer 2012, we observed floating algal aggregates in the melt-water layer below and between melting ice floes of first-year pack ice. The macroscopic (1-15 cm in diameter) aggregates had a mucous consistency and were dominated by...
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ftdoajarticles:oai:doaj.org/article:e1be29c23a9b4899ba7345a269842f06 2023-05-15T14:52:31+02:00 Floating ice-algal aggregates below melting arctic sea ice. Philipp Assmy Jens K Ehn Mar Fernández-Méndez Haakon Hop Christian Katlein Arild Sundfjord Katrin Bluhm Malin Daase Anja Engel Agneta Fransson Mats A Granskog Stephen R Hudson Svein Kristiansen Marcel Nicolaus Ilka Peeken Angelika H H Renner Gunnar Spreen Agnieszka Tatarek Jozef Wiktor 2013-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0076599 https://doaj.org/article/e1be29c23a9b4899ba7345a269842f06 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC3804104?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0076599 https://doaj.org/article/e1be29c23a9b4899ba7345a269842f06 PLoS ONE, Vol 8, Iss 10, p e76599 (2013) Medicine R Science Q article 2013 ftdoajarticles https://doi.org/10.1371/journal.pone.0076599 2022-12-31T10:38:44Z During two consecutive cruises to the Eastern Central Arctic in late summer 2012, we observed floating algal aggregates in the melt-water layer below and between melting ice floes of first-year pack ice. The macroscopic (1-15 cm in diameter) aggregates had a mucous consistency and were dominated by typical ice-associated pennate diatoms embedded within the mucous matrix. Aggregates maintained buoyancy and accumulated just above a strong pycnocline that separated meltwater and seawater layers. We were able, for the first time, to obtain quantitative abundance and biomass estimates of these aggregates. Although their biomass and production on a square metre basis was small compared to ice-algal blooms, the floating ice-algal aggregates supported high levels of biological activity on the scale of the individual aggregate. In addition they constituted a food source for the ice-associated fauna as revealed by pigments indicative of zooplankton grazing, high abundance of naked ciliates, and ice amphipods associated with them. During the Arctic melt season, these floating aggregates likely play an important ecological role in an otherwise impoverished near-surface sea ice environment. Our findings provide important observations and measurements of a unique aggregate-based habitat during the 2012 record sea ice minimum year. Article in Journal/Newspaper Arctic Sea ice Zooplankton Directory of Open Access Journals: DOAJ Articles Arctic PLoS ONE 8 10 e76599 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Philipp Assmy Jens K Ehn Mar Fernández-Méndez Haakon Hop Christian Katlein Arild Sundfjord Katrin Bluhm Malin Daase Anja Engel Agneta Fransson Mats A Granskog Stephen R Hudson Svein Kristiansen Marcel Nicolaus Ilka Peeken Angelika H H Renner Gunnar Spreen Agnieszka Tatarek Jozef Wiktor Floating ice-algal aggregates below melting arctic sea ice. |
topic_facet |
Medicine R Science Q |
description |
During two consecutive cruises to the Eastern Central Arctic in late summer 2012, we observed floating algal aggregates in the melt-water layer below and between melting ice floes of first-year pack ice. The macroscopic (1-15 cm in diameter) aggregates had a mucous consistency and were dominated by typical ice-associated pennate diatoms embedded within the mucous matrix. Aggregates maintained buoyancy and accumulated just above a strong pycnocline that separated meltwater and seawater layers. We were able, for the first time, to obtain quantitative abundance and biomass estimates of these aggregates. Although their biomass and production on a square metre basis was small compared to ice-algal blooms, the floating ice-algal aggregates supported high levels of biological activity on the scale of the individual aggregate. In addition they constituted a food source for the ice-associated fauna as revealed by pigments indicative of zooplankton grazing, high abundance of naked ciliates, and ice amphipods associated with them. During the Arctic melt season, these floating aggregates likely play an important ecological role in an otherwise impoverished near-surface sea ice environment. Our findings provide important observations and measurements of a unique aggregate-based habitat during the 2012 record sea ice minimum year. |
format |
Article in Journal/Newspaper |
author |
Philipp Assmy Jens K Ehn Mar Fernández-Méndez Haakon Hop Christian Katlein Arild Sundfjord Katrin Bluhm Malin Daase Anja Engel Agneta Fransson Mats A Granskog Stephen R Hudson Svein Kristiansen Marcel Nicolaus Ilka Peeken Angelika H H Renner Gunnar Spreen Agnieszka Tatarek Jozef Wiktor |
author_facet |
Philipp Assmy Jens K Ehn Mar Fernández-Méndez Haakon Hop Christian Katlein Arild Sundfjord Katrin Bluhm Malin Daase Anja Engel Agneta Fransson Mats A Granskog Stephen R Hudson Svein Kristiansen Marcel Nicolaus Ilka Peeken Angelika H H Renner Gunnar Spreen Agnieszka Tatarek Jozef Wiktor |
author_sort |
Philipp Assmy |
title |
Floating ice-algal aggregates below melting arctic sea ice. |
title_short |
Floating ice-algal aggregates below melting arctic sea ice. |
title_full |
Floating ice-algal aggregates below melting arctic sea ice. |
title_fullStr |
Floating ice-algal aggregates below melting arctic sea ice. |
title_full_unstemmed |
Floating ice-algal aggregates below melting arctic sea ice. |
title_sort |
floating ice-algal aggregates below melting arctic sea ice. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2013 |
url |
https://doi.org/10.1371/journal.pone.0076599 https://doaj.org/article/e1be29c23a9b4899ba7345a269842f06 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice Zooplankton |
genre_facet |
Arctic Sea ice Zooplankton |
op_source |
PLoS ONE, Vol 8, Iss 10, p e76599 (2013) |
op_relation |
http://europepmc.org/articles/PMC3804104?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0076599 https://doaj.org/article/e1be29c23a9b4899ba7345a269842f06 |
op_doi |
https://doi.org/10.1371/journal.pone.0076599 |
container_title |
PLoS ONE |
container_volume |
8 |
container_issue |
10 |
container_start_page |
e76599 |
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1766323751722418176 |