Ecosystem function and particle flux dynamics across the Mackenzie Shelf (Beaufort Sea, Arctic Ocean): an integrative analysis of spatial variability and biophysical forcings.
A better understanding of how environmental changes affect organic matter fluxes in Arctic marine ecosystems is sorely needed. Here we combine mooring times series, ship-based measurements and remote sensing to assess the variability and forcing factors of vertical fluxes of particulate organic carb...
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ftinrsquebec:oai:espace.inrs.ca:3724 2023-05-15T14:27:54+02:00 Ecosystem function and particle flux dynamics across the Mackenzie Shelf (Beaufort Sea, Arctic Ocean): an integrative analysis of spatial variability and biophysical forcings. Forest, Alexandre Babin, Marcel Stemmann, Lars Picheral, Marc Sampei, Makoto Fortier, Louis Gratton, Yves Bélanger, Simon Devred, Emmanuel Sahlin, Jonas Doxaran, David Joux, Fabien Ortega-Retuerta, Eva Martin, Jacobo Jeffrey, Wade Gasser, Beat Miquel, Juan-Carlos 2013 application/pdf https://espace.inrs.ca/id/eprint/3724/ https://espace.inrs.ca/id/eprint/3724/1/P2349.pdf https://doi.org/10.5194/bg-10-2833-2013 en eng https://espace.inrs.ca/id/eprint/3724/1/P2349.pdf Forest, Alexandre, Babin, Marcel, Stemmann, Lars, Picheral, Marc, Sampei, Makoto, Fortier, Louis, Gratton, Yves, Bélanger, Simon, Devred, Emmanuel, Sahlin, Jonas, Doxaran, David, Joux, Fabien, Ortega-Retuerta, Eva, Martin, Jacobo, Jeffrey, Wade, Gasser, Beat et Miquel, Juan-Carlos (2013). Ecosystem function and particle flux dynamics across the Mackenzie Shelf (Beaufort Sea, Arctic Ocean): an integrative analysis of spatial variability and biophysical forcings. Biogeosciences , vol. 10 , nº 5. p. 2833-2866. DOI:10.5194/bg-10-2833-2013 <https://doi.org/10.5194/bg-10-2833-2013>. doi:10.5194/bg-10-2833-2013 algorithm bacterium biological production biophysics concentration (composition) crustacean Article Évalué par les pairs 2013 ftinrsquebec https://doi.org/10.5194/bg-10-2833-2013 2023-02-12T00:11:53Z A better understanding of how environmental changes affect organic matter fluxes in Arctic marine ecosystems is sorely needed. Here we combine mooring times series, ship-based measurements and remote sensing to assess the variability and forcing factors of vertical fluxes of particulate organic carbon (POC) across the Mackenzie Shelf in 2009. We developed a geospatial model of these fluxes to proceed to an integrative analysis of their determinants in summer. Flux data were obtained with sediment traps moored around 125m and via a regional empirical algorithm applied to particle size distributions (17 classes from 0.08-4.2 mm) measured by an Underwater Vision Profiler 5. The low fractal dimension (i.e., porous, fluffy particles) derived from the algorithm (1.26 +/- 0.34) and the dominance (~ to 77 %) of rapidly sinking small aggregates (< 0.5 mm) in total fluxes suggested that settling material was the product of recent aggregation processes between marine detritus, gel-like substances, and ballast minerals. Modeled settling velocity of small and large aggregates was, respectively, higher and lower than in previous studies within which a high fractal dimension (i.e., more compact particles) was consequential of deep-trap collection (~ to 400-1300 m). Redundancy analyses and forward selection of abiotic/biotic parameters, linear trends, and spatial structures (i.e., principal coordinates of neighbor matrices, PCNM) were conducted to partition the variation of the 17 POC flux size classes. Flux variability was explained at 69.5% by the addition of a temporal trend, 7 significant PCNM, and 9 biophysical variables. The first PCNM canonical axis (44.5% of spatial variance) reflected the total magnitude of POC fluxes through a shelf-basin gradient controlled by bottom depth and sea ice concentration (p < 0.01). The second most important spatial structure (5.0 %) corresponded to areas where shelf break upwelling is known to occur under easterlies and where phytoplankton was dominated by diatoms. Among biophysical ... Article in Journal/Newspaper Arctic Arctic Arctic Ocean Beaufort Sea Mackenzie Shelf Phytoplankton Sea ice Institut national de la recherche scientifique, Québec: Espace INRS Arctic Arctic Ocean Biogeosciences 10 5 2833 2866 |
institution |
Open Polar |
collection |
Institut national de la recherche scientifique, Québec: Espace INRS |
op_collection_id |
ftinrsquebec |
language |
English |
topic |
algorithm bacterium biological production biophysics concentration (composition) crustacean |
spellingShingle |
algorithm bacterium biological production biophysics concentration (composition) crustacean Forest, Alexandre Babin, Marcel Stemmann, Lars Picheral, Marc Sampei, Makoto Fortier, Louis Gratton, Yves Bélanger, Simon Devred, Emmanuel Sahlin, Jonas Doxaran, David Joux, Fabien Ortega-Retuerta, Eva Martin, Jacobo Jeffrey, Wade Gasser, Beat Miquel, Juan-Carlos Ecosystem function and particle flux dynamics across the Mackenzie Shelf (Beaufort Sea, Arctic Ocean): an integrative analysis of spatial variability and biophysical forcings. |
topic_facet |
algorithm bacterium biological production biophysics concentration (composition) crustacean |
description |
A better understanding of how environmental changes affect organic matter fluxes in Arctic marine ecosystems is sorely needed. Here we combine mooring times series, ship-based measurements and remote sensing to assess the variability and forcing factors of vertical fluxes of particulate organic carbon (POC) across the Mackenzie Shelf in 2009. We developed a geospatial model of these fluxes to proceed to an integrative analysis of their determinants in summer. Flux data were obtained with sediment traps moored around 125m and via a regional empirical algorithm applied to particle size distributions (17 classes from 0.08-4.2 mm) measured by an Underwater Vision Profiler 5. The low fractal dimension (i.e., porous, fluffy particles) derived from the algorithm (1.26 +/- 0.34) and the dominance (~ to 77 %) of rapidly sinking small aggregates (< 0.5 mm) in total fluxes suggested that settling material was the product of recent aggregation processes between marine detritus, gel-like substances, and ballast minerals. Modeled settling velocity of small and large aggregates was, respectively, higher and lower than in previous studies within which a high fractal dimension (i.e., more compact particles) was consequential of deep-trap collection (~ to 400-1300 m). Redundancy analyses and forward selection of abiotic/biotic parameters, linear trends, and spatial structures (i.e., principal coordinates of neighbor matrices, PCNM) were conducted to partition the variation of the 17 POC flux size classes. Flux variability was explained at 69.5% by the addition of a temporal trend, 7 significant PCNM, and 9 biophysical variables. The first PCNM canonical axis (44.5% of spatial variance) reflected the total magnitude of POC fluxes through a shelf-basin gradient controlled by bottom depth and sea ice concentration (p < 0.01). The second most important spatial structure (5.0 %) corresponded to areas where shelf break upwelling is known to occur under easterlies and where phytoplankton was dominated by diatoms. Among biophysical ... |
format |
Article in Journal/Newspaper |
author |
Forest, Alexandre Babin, Marcel Stemmann, Lars Picheral, Marc Sampei, Makoto Fortier, Louis Gratton, Yves Bélanger, Simon Devred, Emmanuel Sahlin, Jonas Doxaran, David Joux, Fabien Ortega-Retuerta, Eva Martin, Jacobo Jeffrey, Wade Gasser, Beat Miquel, Juan-Carlos |
author_facet |
Forest, Alexandre Babin, Marcel Stemmann, Lars Picheral, Marc Sampei, Makoto Fortier, Louis Gratton, Yves Bélanger, Simon Devred, Emmanuel Sahlin, Jonas Doxaran, David Joux, Fabien Ortega-Retuerta, Eva Martin, Jacobo Jeffrey, Wade Gasser, Beat Miquel, Juan-Carlos |
author_sort |
Forest, Alexandre |
title |
Ecosystem function and particle flux dynamics across the Mackenzie Shelf (Beaufort Sea, Arctic Ocean): an integrative analysis of spatial variability and biophysical forcings. |
title_short |
Ecosystem function and particle flux dynamics across the Mackenzie Shelf (Beaufort Sea, Arctic Ocean): an integrative analysis of spatial variability and biophysical forcings. |
title_full |
Ecosystem function and particle flux dynamics across the Mackenzie Shelf (Beaufort Sea, Arctic Ocean): an integrative analysis of spatial variability and biophysical forcings. |
title_fullStr |
Ecosystem function and particle flux dynamics across the Mackenzie Shelf (Beaufort Sea, Arctic Ocean): an integrative analysis of spatial variability and biophysical forcings. |
title_full_unstemmed |
Ecosystem function and particle flux dynamics across the Mackenzie Shelf (Beaufort Sea, Arctic Ocean): an integrative analysis of spatial variability and biophysical forcings. |
title_sort |
ecosystem function and particle flux dynamics across the mackenzie shelf (beaufort sea, arctic ocean): an integrative analysis of spatial variability and biophysical forcings. |
publishDate |
2013 |
url |
https://espace.inrs.ca/id/eprint/3724/ https://espace.inrs.ca/id/eprint/3724/1/P2349.pdf https://doi.org/10.5194/bg-10-2833-2013 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean Beaufort Sea Mackenzie Shelf Phytoplankton Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean Beaufort Sea Mackenzie Shelf Phytoplankton Sea ice |
op_relation |
https://espace.inrs.ca/id/eprint/3724/1/P2349.pdf Forest, Alexandre, Babin, Marcel, Stemmann, Lars, Picheral, Marc, Sampei, Makoto, Fortier, Louis, Gratton, Yves, Bélanger, Simon, Devred, Emmanuel, Sahlin, Jonas, Doxaran, David, Joux, Fabien, Ortega-Retuerta, Eva, Martin, Jacobo, Jeffrey, Wade, Gasser, Beat et Miquel, Juan-Carlos (2013). Ecosystem function and particle flux dynamics across the Mackenzie Shelf (Beaufort Sea, Arctic Ocean): an integrative analysis of spatial variability and biophysical forcings. Biogeosciences , vol. 10 , nº 5. p. 2833-2866. DOI:10.5194/bg-10-2833-2013 <https://doi.org/10.5194/bg-10-2833-2013>. doi:10.5194/bg-10-2833-2013 |
op_doi |
https://doi.org/10.5194/bg-10-2833-2013 |
container_title |
Biogeosciences |
container_volume |
10 |
container_issue |
5 |
container_start_page |
2833 |
op_container_end_page |
2866 |
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1766301973847474176 |