The uptake of silica during the spring bloom in the Northeast Atlantic Ocean
A full understanding of the biogeochemical cycling of silica in the North Atlantic is hampered by a lack of estimates of silica uptake by phytoplankton. We applied the 32Si radiotracer incubation technique to determine silica uptake rates at 10 sites during the UK-(Natural Environment Research Counc...
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ftsouthampton:oai:eprints.soton.ac.uk:2258 2023-07-30T04:03:26+02:00 The uptake of silica during the spring bloom in the Northeast Atlantic Ocean Brown, Louise Sanders, Richard Savidge, Graham Lucas, Cathy H. 2003 text https://eprints.soton.ac.uk/2258/ https://eprints.soton.ac.uk/2258/1/1831.pdf en eng https://eprints.soton.ac.uk/2258/1/1831.pdf Brown, Louise, Sanders, Richard, Savidge, Graham and Lucas, Cathy H. (2003) The uptake of silica during the spring bloom in the Northeast Atlantic Ocean. Limnology and Oceanography, 48 (5), 1831-1845. Article PeerReviewed 2003 ftsouthampton 2023-07-09T20:28:59Z A full understanding of the biogeochemical cycling of silica in the North Atlantic is hampered by a lack of estimates of silica uptake by phytoplankton. We applied the 32Si radiotracer incubation technique to determine silica uptake rates at 10 sites during the UK-(Natural Environment Research Council) Faroes–Iceland–Scotland hydrographic and environmental survey (FISHES) cruise in the Northeast Atlantic, May 2001. Column silica uptake rates ranged between 6 and 166 mmol Si m-2 d-1; this data set was integrated with concurrent hydrographic, chemical, and primary productivity data to explain these changes in silica uptake in terms of the progress of the spring bloom. In order to interpret data covering a relatively large spatial and temporal scale, we used mean photic zone silica concentration as a proxy time-series measure of diatom bloom progression. Both absolute and specific silica uptake rates were highest at dissolved silica concentrations >2 µmol L-1. Si and C uptake were vertically decoupled at those stations where surface silica was strongly depleted. Absolute primary productivity was not strongly correlated with dissolved silica concentrations, owing to either exhaustion of silica at diatom-dominated stations or to dominance of the community by other phytoplankton. Silica uptake as a function of increased substrate concentration was linear up to 25 µmol L-1; we consider some possible reasons for the nonhyperbolic response. Article in Journal/Newspaper Faroes Iceland North Atlantic Northeast Atlantic University of Southampton: e-Prints Soton |
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University of Southampton: e-Prints Soton |
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ftsouthampton |
language |
English |
description |
A full understanding of the biogeochemical cycling of silica in the North Atlantic is hampered by a lack of estimates of silica uptake by phytoplankton. We applied the 32Si radiotracer incubation technique to determine silica uptake rates at 10 sites during the UK-(Natural Environment Research Council) Faroes–Iceland–Scotland hydrographic and environmental survey (FISHES) cruise in the Northeast Atlantic, May 2001. Column silica uptake rates ranged between 6 and 166 mmol Si m-2 d-1; this data set was integrated with concurrent hydrographic, chemical, and primary productivity data to explain these changes in silica uptake in terms of the progress of the spring bloom. In order to interpret data covering a relatively large spatial and temporal scale, we used mean photic zone silica concentration as a proxy time-series measure of diatom bloom progression. Both absolute and specific silica uptake rates were highest at dissolved silica concentrations >2 µmol L-1. Si and C uptake were vertically decoupled at those stations where surface silica was strongly depleted. Absolute primary productivity was not strongly correlated with dissolved silica concentrations, owing to either exhaustion of silica at diatom-dominated stations or to dominance of the community by other phytoplankton. Silica uptake as a function of increased substrate concentration was linear up to 25 µmol L-1; we consider some possible reasons for the nonhyperbolic response. |
format |
Article in Journal/Newspaper |
author |
Brown, Louise Sanders, Richard Savidge, Graham Lucas, Cathy H. |
spellingShingle |
Brown, Louise Sanders, Richard Savidge, Graham Lucas, Cathy H. The uptake of silica during the spring bloom in the Northeast Atlantic Ocean |
author_facet |
Brown, Louise Sanders, Richard Savidge, Graham Lucas, Cathy H. |
author_sort |
Brown, Louise |
title |
The uptake of silica during the spring bloom in the Northeast Atlantic Ocean |
title_short |
The uptake of silica during the spring bloom in the Northeast Atlantic Ocean |
title_full |
The uptake of silica during the spring bloom in the Northeast Atlantic Ocean |
title_fullStr |
The uptake of silica during the spring bloom in the Northeast Atlantic Ocean |
title_full_unstemmed |
The uptake of silica during the spring bloom in the Northeast Atlantic Ocean |
title_sort |
uptake of silica during the spring bloom in the northeast atlantic ocean |
publishDate |
2003 |
url |
https://eprints.soton.ac.uk/2258/ https://eprints.soton.ac.uk/2258/1/1831.pdf |
genre |
Faroes Iceland North Atlantic Northeast Atlantic |
genre_facet |
Faroes Iceland North Atlantic Northeast Atlantic |
op_relation |
https://eprints.soton.ac.uk/2258/1/1831.pdf Brown, Louise, Sanders, Richard, Savidge, Graham and Lucas, Cathy H. (2003) The uptake of silica during the spring bloom in the Northeast Atlantic Ocean. Limnology and Oceanography, 48 (5), 1831-1845. |
_version_ |
1772814424004886528 |