Seasonal dynamics of bacterial biomass and production in a coastal arctic ecosystem: Franklin Bay, western Canadian Arctic.
La transcription des symboles et des caractères spéciaux utilisés dans la version originale de ce résumé n’a pas été possible en raison de limitations techniques. La version correcte de ce résumé peut être lue en PDF. [1] The Canadian Arctic Shelf Exchange Study (CASES) included the overwintering de...
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Online Access: | https://espace.inrs.ca/id/eprint/9430/ https://espace.inrs.ca/id/eprint/9430/1/P1652.pdf https://doi.org/10.1029/2007JC004281 |
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ftinrsquebec:oai:espace.inrs.ca:9430 2023-05-15T14:22:51+02:00 Seasonal dynamics of bacterial biomass and production in a coastal arctic ecosystem: Franklin Bay, western Canadian Arctic. Garneau, Marie-Ève Roy, Sébastien Lovejoy, Connie Gratton, Yves Vincent, Warwick F. 2008 application/pdf https://espace.inrs.ca/id/eprint/9430/ https://espace.inrs.ca/id/eprint/9430/1/P1652.pdf https://doi.org/10.1029/2007JC004281 en eng https://espace.inrs.ca/id/eprint/9430/1/P1652.pdf Garneau, Marie-Ève, Roy, Sébastien, Lovejoy, Connie, Gratton, Yves et Vincent, Warwick F. (2008). Seasonal dynamics of bacterial biomass and production in a coastal arctic ecosystem: Franklin Bay, western Canadian Arctic. Journal of Geophysical Research , vol. 113 , nº C7. DOI:10.1029/2007JC004281 <https://doi.org/10.1029/2007JC004281>. doi:10.1029/2007JC004281 bacterial production Arctic Ocean carbon fluxes Article Évalué par les pairs 2008 ftinrsquebec https://doi.org/10.1029/2007JC004281 2023-02-10T11:45:37Z La transcription des symboles et des caractères spéciaux utilisés dans la version originale de ce résumé n’a pas été possible en raison de limitations techniques. La version correcte de ce résumé peut être lue en PDF. [1] The Canadian Arctic Shelf Exchange Study (CASES) included the overwintering deployment of a research platform in Franklin Bay (70°N, 126°W) and provided a unique seasonal record of bacterial dynamics in a coastal region of the Arctic Ocean. Our objectives were (1) to relate seasonal bacterial abundance (BA) and production (BP) to physico‐chemical characteristics and (2) to quantify the annual bacterial carbon flux. BA was estimated by epifluorescence microscopy and BP was estimated from 3H‐leucine and 3H‐thymidine assays. Mean BA values for the water column ranged from 1.0 (December) to 6.8 × 105 cells mL−1 (July). Integral BP varied from 1 (February) to 80 mg C m−2 d−1 (July). During winter‐spring, BP was uncorrelated with chlorophyll a (Chl a), but these variables were significantly correlated during summer‐autumn (rs = 0.68, p < 0.001, N = 38), suggesting that BP was subject to bottom‐up control by carbon supply. Integrated BP data showed three distinct periods: fall‐winter, late winter–late spring, and summer. A baseline level of BB and BP was maintained throughout late winter–late spring despite the persistent cold and darkness, with irregular fluctuations that may be related to hydrodynamic events. During this period, BP rates were correlated with colored dissolved organic matter (CDOM) but not Chl a (rs BP.CDOM∣Chl a = 0.20, p < 0.05, N = 176). Annual BP was estimated as 6 g C m−2 a−1, implying a total BP of 4.8 × 1010 g C a−1 for the Franklin Bay region. These results show that bacterial processes continue throughout all seasons and make a large contribution to the total biological carbon flux in this coastal arctic ecosystem. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Franklin Bay Institut national de la recherche scientifique, Québec: Espace INRS Arctic Arctic Ocean Journal of Geophysical Research 113 C7 |
institution |
Open Polar |
collection |
Institut national de la recherche scientifique, Québec: Espace INRS |
op_collection_id |
ftinrsquebec |
language |
English |
topic |
bacterial production Arctic Ocean carbon fluxes |
spellingShingle |
bacterial production Arctic Ocean carbon fluxes Garneau, Marie-Ève Roy, Sébastien Lovejoy, Connie Gratton, Yves Vincent, Warwick F. Seasonal dynamics of bacterial biomass and production in a coastal arctic ecosystem: Franklin Bay, western Canadian Arctic. |
topic_facet |
bacterial production Arctic Ocean carbon fluxes |
description |
La transcription des symboles et des caractères spéciaux utilisés dans la version originale de ce résumé n’a pas été possible en raison de limitations techniques. La version correcte de ce résumé peut être lue en PDF. [1] The Canadian Arctic Shelf Exchange Study (CASES) included the overwintering deployment of a research platform in Franklin Bay (70°N, 126°W) and provided a unique seasonal record of bacterial dynamics in a coastal region of the Arctic Ocean. Our objectives were (1) to relate seasonal bacterial abundance (BA) and production (BP) to physico‐chemical characteristics and (2) to quantify the annual bacterial carbon flux. BA was estimated by epifluorescence microscopy and BP was estimated from 3H‐leucine and 3H‐thymidine assays. Mean BA values for the water column ranged from 1.0 (December) to 6.8 × 105 cells mL−1 (July). Integral BP varied from 1 (February) to 80 mg C m−2 d−1 (July). During winter‐spring, BP was uncorrelated with chlorophyll a (Chl a), but these variables were significantly correlated during summer‐autumn (rs = 0.68, p < 0.001, N = 38), suggesting that BP was subject to bottom‐up control by carbon supply. Integrated BP data showed three distinct periods: fall‐winter, late winter–late spring, and summer. A baseline level of BB and BP was maintained throughout late winter–late spring despite the persistent cold and darkness, with irregular fluctuations that may be related to hydrodynamic events. During this period, BP rates were correlated with colored dissolved organic matter (CDOM) but not Chl a (rs BP.CDOM∣Chl a = 0.20, p < 0.05, N = 176). Annual BP was estimated as 6 g C m−2 a−1, implying a total BP of 4.8 × 1010 g C a−1 for the Franklin Bay region. These results show that bacterial processes continue throughout all seasons and make a large contribution to the total biological carbon flux in this coastal arctic ecosystem. |
format |
Article in Journal/Newspaper |
author |
Garneau, Marie-Ève Roy, Sébastien Lovejoy, Connie Gratton, Yves Vincent, Warwick F. |
author_facet |
Garneau, Marie-Ève Roy, Sébastien Lovejoy, Connie Gratton, Yves Vincent, Warwick F. |
author_sort |
Garneau, Marie-Ève |
title |
Seasonal dynamics of bacterial biomass and production in a coastal arctic ecosystem: Franklin Bay, western Canadian Arctic. |
title_short |
Seasonal dynamics of bacterial biomass and production in a coastal arctic ecosystem: Franklin Bay, western Canadian Arctic. |
title_full |
Seasonal dynamics of bacterial biomass and production in a coastal arctic ecosystem: Franklin Bay, western Canadian Arctic. |
title_fullStr |
Seasonal dynamics of bacterial biomass and production in a coastal arctic ecosystem: Franklin Bay, western Canadian Arctic. |
title_full_unstemmed |
Seasonal dynamics of bacterial biomass and production in a coastal arctic ecosystem: Franklin Bay, western Canadian Arctic. |
title_sort |
seasonal dynamics of bacterial biomass and production in a coastal arctic ecosystem: franklin bay, western canadian arctic. |
publishDate |
2008 |
url |
https://espace.inrs.ca/id/eprint/9430/ https://espace.inrs.ca/id/eprint/9430/1/P1652.pdf https://doi.org/10.1029/2007JC004281 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean Franklin Bay |
genre_facet |
Arctic Arctic Arctic Ocean Franklin Bay |
op_relation |
https://espace.inrs.ca/id/eprint/9430/1/P1652.pdf Garneau, Marie-Ève, Roy, Sébastien, Lovejoy, Connie, Gratton, Yves et Vincent, Warwick F. (2008). Seasonal dynamics of bacterial biomass and production in a coastal arctic ecosystem: Franklin Bay, western Canadian Arctic. Journal of Geophysical Research , vol. 113 , nº C7. DOI:10.1029/2007JC004281 <https://doi.org/10.1029/2007JC004281>. doi:10.1029/2007JC004281 |
op_doi |
https://doi.org/10.1029/2007JC004281 |
container_title |
Journal of Geophysical Research |
container_volume |
113 |
container_issue |
C7 |
_version_ |
1766295364900487168 |