Composition, Buoyancy Regulation and Fate of Ice Algal Aggregates in the Central Arctic Ocean
Sea-ice diatoms are known to accumulate in large aggregates in and under sea ice and in melt ponds. There is recent evidence from the Arctic that such aggregates can contribute substantially to particle export when sinking from the ice. The role and regulation of microbial aggregation in the highly...
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ftawi:oai:epic.awi.de:36290 2023-05-15T14:27:43+02:00 Composition, Buoyancy Regulation and Fate of Ice Algal Aggregates in the Central Arctic Ocean Fernández Méndez, Mar Wenzhöfer, Frank Peeken, Ilka Sorensen, Heidi Louise Glud, Ronnie Nohr Boetius, Antje 2014-09-10 application/pdf https://epic.awi.de/id/eprint/36290/ https://epic.awi.de/id/eprint/36290/1/FernandezMendez2014.pdf https://hdl.handle.net/10013/epic.44142 https://hdl.handle.net/10013/epic.44142.d001 unknown PUBLIC LIBRARY SCIENCE https://epic.awi.de/id/eprint/36290/1/FernandezMendez2014.pdf https://hdl.handle.net/10013/epic.44142.d001 Fernández Méndez, M. , Wenzhöfer, F. orcid:0000-0002-4621-0586 , Peeken, I. orcid:0000-0003-1531-1664 , Sorensen, H. L. , Glud, R. N. and Boetius, A. orcid:0000-0003-2117-4176 (2014) Composition, Buoyancy Regulation and Fate of Ice Algal Aggregates in the Central Arctic Ocean , PLoS ONE, 9 (9), e107452 . doi:10.1371/journal.pone.0107452 <https://doi.org/10.1371/journal.pone.0107452> , hdl:10013/epic.44142 info:eu-repo/semantics/openAccess EPIC3PLoS ONE, PUBLIC LIBRARY SCIENCE, 9(9), pp. e107452, ISSN: 1932-6203 Article isiRev info:eu-repo/semantics/article 2014 ftawi https://doi.org/10.1371/journal.pone.0107452 2021-12-24T15:39:49Z Sea-ice diatoms are known to accumulate in large aggregates in and under sea ice and in melt ponds. There is recent evidence from the Arctic that such aggregates can contribute substantially to particle export when sinking from the ice. The role and regulation of microbial aggregation in the highly seasonal, nutrient- and light-limited Arctic sea-ice ecosystem is not well understood. To elucidate the mechanisms controlling the formation and export of algal aggregates from sea ice, we investigated samples taken in late summer 2011 and 2012, during two cruises to the Eurasian Basin of the Central Arctic Ocean. Spherical aggregates densely packed with pennate diatoms, as well as filamentous aggregates formed by Melosira arctica showed sign of different stages of degradation and physiological stoichiometries, with carbon to chlorophyll a ratios ranging from 110 to 66700, and carbon to nitrogen molar ratios of 8–35 and 9–40, respectively. Sub-ice algal aggregate densities ranged between 1 and 17 aggregates m−2, maintaining an estimated net primary production of 0.4–40 mg C m−2 d−1, and accounted for 3–80% of total phototrophic biomass and up to 94% of local net primary production. A potential factor controlling the buoyancy of the aggregates was light intensity, regulating photosynthetic oxygen production and the amount of gas bubbles trapped within the mucous matrix, even at low ambient nutrient concentrations. Our data-set was used to evaluate the distribution and importance of Arctic algal aggregates as carbon source for pelagic and benthic communities. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Arctic Ocean PLoS ONE 9 9 e107452 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Sea-ice diatoms are known to accumulate in large aggregates in and under sea ice and in melt ponds. There is recent evidence from the Arctic that such aggregates can contribute substantially to particle export when sinking from the ice. The role and regulation of microbial aggregation in the highly seasonal, nutrient- and light-limited Arctic sea-ice ecosystem is not well understood. To elucidate the mechanisms controlling the formation and export of algal aggregates from sea ice, we investigated samples taken in late summer 2011 and 2012, during two cruises to the Eurasian Basin of the Central Arctic Ocean. Spherical aggregates densely packed with pennate diatoms, as well as filamentous aggregates formed by Melosira arctica showed sign of different stages of degradation and physiological stoichiometries, with carbon to chlorophyll a ratios ranging from 110 to 66700, and carbon to nitrogen molar ratios of 8–35 and 9–40, respectively. Sub-ice algal aggregate densities ranged between 1 and 17 aggregates m−2, maintaining an estimated net primary production of 0.4–40 mg C m−2 d−1, and accounted for 3–80% of total phototrophic biomass and up to 94% of local net primary production. A potential factor controlling the buoyancy of the aggregates was light intensity, regulating photosynthetic oxygen production and the amount of gas bubbles trapped within the mucous matrix, even at low ambient nutrient concentrations. Our data-set was used to evaluate the distribution and importance of Arctic algal aggregates as carbon source for pelagic and benthic communities. |
format |
Article in Journal/Newspaper |
author |
Fernández Méndez, Mar Wenzhöfer, Frank Peeken, Ilka Sorensen, Heidi Louise Glud, Ronnie Nohr Boetius, Antje |
spellingShingle |
Fernández Méndez, Mar Wenzhöfer, Frank Peeken, Ilka Sorensen, Heidi Louise Glud, Ronnie Nohr Boetius, Antje Composition, Buoyancy Regulation and Fate of Ice Algal Aggregates in the Central Arctic Ocean |
author_facet |
Fernández Méndez, Mar Wenzhöfer, Frank Peeken, Ilka Sorensen, Heidi Louise Glud, Ronnie Nohr Boetius, Antje |
author_sort |
Fernández Méndez, Mar |
title |
Composition, Buoyancy Regulation and Fate of Ice Algal Aggregates in the Central Arctic Ocean |
title_short |
Composition, Buoyancy Regulation and Fate of Ice Algal Aggregates in the Central Arctic Ocean |
title_full |
Composition, Buoyancy Regulation and Fate of Ice Algal Aggregates in the Central Arctic Ocean |
title_fullStr |
Composition, Buoyancy Regulation and Fate of Ice Algal Aggregates in the Central Arctic Ocean |
title_full_unstemmed |
Composition, Buoyancy Regulation and Fate of Ice Algal Aggregates in the Central Arctic Ocean |
title_sort |
composition, buoyancy regulation and fate of ice algal aggregates in the central arctic ocean |
publisher |
PUBLIC LIBRARY SCIENCE |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/36290/ https://epic.awi.de/id/eprint/36290/1/FernandezMendez2014.pdf https://hdl.handle.net/10013/epic.44142 https://hdl.handle.net/10013/epic.44142.d001 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean Sea ice |
op_source |
EPIC3PLoS ONE, PUBLIC LIBRARY SCIENCE, 9(9), pp. e107452, ISSN: 1932-6203 |
op_relation |
https://epic.awi.de/id/eprint/36290/1/FernandezMendez2014.pdf https://hdl.handle.net/10013/epic.44142.d001 Fernández Méndez, M. , Wenzhöfer, F. orcid:0000-0002-4621-0586 , Peeken, I. orcid:0000-0003-1531-1664 , Sorensen, H. L. , Glud, R. N. and Boetius, A. orcid:0000-0003-2117-4176 (2014) Composition, Buoyancy Regulation and Fate of Ice Algal Aggregates in the Central Arctic Ocean , PLoS ONE, 9 (9), e107452 . doi:10.1371/journal.pone.0107452 <https://doi.org/10.1371/journal.pone.0107452> , hdl:10013/epic.44142 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0107452 |
container_title |
PLoS ONE |
container_volume |
9 |
container_issue |
9 |
container_start_page |
e107452 |
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1766301573776932864 |