Relative mineralisation of C and Si from biogenic particulate matter in the upper water column during the North East Atlantic diatom bloom in spring 2001
The standing stocks and production rates of particulate organic carbon (POC) and biogenic silica (bSiO2) were measured in the upper water column at 10 stations in the North East Atlantic during the spring 2001 diatom bloom. The elemental composition of the particulate pool was rather homogeneous wit...
Published in: | Journal of Marine Systems |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2006
|
Subjects: | |
Online Access: | https://eprints.soton.ac.uk/43984/ |
id |
ftsouthampton:oai:eprints.soton.ac.uk:43984 |
---|---|
record_format |
openpolar |
spelling |
ftsouthampton:oai:eprints.soton.ac.uk:43984 2023-07-30T04:05:29+02:00 Relative mineralisation of C and Si from biogenic particulate matter in the upper water column during the North East Atlantic diatom bloom in spring 2001 Brown, L. Sanders, R. Savidge, G. 2006 https://eprints.soton.ac.uk/43984/ unknown Brown, L., Sanders, R. and Savidge, G. (2006) Relative mineralisation of C and Si from biogenic particulate matter in the upper water column during the North East Atlantic diatom bloom in spring 2001. Journal of Marine Systems, 63 (1-2), 79-90. (doi:10.1016/j.jmarsys.2006.03.001 <http://dx.doi.org/10.1016/j.jmarsys.2006.03.001>). Article PeerReviewed 2006 ftsouthampton https://doi.org/10.1016/j.jmarsys.2006.03.001 2023-07-09T20:50:48Z The standing stocks and production rates of particulate organic carbon (POC) and biogenic silica (bSiO2) were measured in the upper water column at 10 stations in the North East Atlantic during the spring 2001 diatom bloom. The elemental composition of the particulate pool was rather homogeneous with depth, suggesting that any material being exported from the photic zone was generally similar in composition to the ambient pool. Pronounced vertical structure was observed in uptake ratios resulting from the strong light dependence of the carbon fixation and the weak light dependence of biogenic silica production. The integrated C/Si molar ratios of particulate material were found to be generally larger than the corresponding assimilation ratios. We interpret this discrepancy as implying a preferential mineralization of Si relative to C from particulate matter during the earliest stages of processing in the upper water column. The preferential mineralisation of Si relative to C in the early stages of particle processing contrasts with processes occurring deeper in the water column, where C is typically mineralised preferentially to Si, and particulate matter becomes enriched in bSiO2. In the northern North Atlantic, the balance of mineralisation of Si relative to C from sinking organic matter with depth is likely to strongly influence the role of diatoms in export production. Article in Journal/Newspaper North Atlantic North East Atlantic University of Southampton: e-Prints Soton Journal of Marine Systems 63 1-2 79 90 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
The standing stocks and production rates of particulate organic carbon (POC) and biogenic silica (bSiO2) were measured in the upper water column at 10 stations in the North East Atlantic during the spring 2001 diatom bloom. The elemental composition of the particulate pool was rather homogeneous with depth, suggesting that any material being exported from the photic zone was generally similar in composition to the ambient pool. Pronounced vertical structure was observed in uptake ratios resulting from the strong light dependence of the carbon fixation and the weak light dependence of biogenic silica production. The integrated C/Si molar ratios of particulate material were found to be generally larger than the corresponding assimilation ratios. We interpret this discrepancy as implying a preferential mineralization of Si relative to C from particulate matter during the earliest stages of processing in the upper water column. The preferential mineralisation of Si relative to C in the early stages of particle processing contrasts with processes occurring deeper in the water column, where C is typically mineralised preferentially to Si, and particulate matter becomes enriched in bSiO2. In the northern North Atlantic, the balance of mineralisation of Si relative to C from sinking organic matter with depth is likely to strongly influence the role of diatoms in export production. |
format |
Article in Journal/Newspaper |
author |
Brown, L. Sanders, R. Savidge, G. |
spellingShingle |
Brown, L. Sanders, R. Savidge, G. Relative mineralisation of C and Si from biogenic particulate matter in the upper water column during the North East Atlantic diatom bloom in spring 2001 |
author_facet |
Brown, L. Sanders, R. Savidge, G. |
author_sort |
Brown, L. |
title |
Relative mineralisation of C and Si from biogenic particulate matter in the upper water column during the North East Atlantic diatom bloom in spring 2001 |
title_short |
Relative mineralisation of C and Si from biogenic particulate matter in the upper water column during the North East Atlantic diatom bloom in spring 2001 |
title_full |
Relative mineralisation of C and Si from biogenic particulate matter in the upper water column during the North East Atlantic diatom bloom in spring 2001 |
title_fullStr |
Relative mineralisation of C and Si from biogenic particulate matter in the upper water column during the North East Atlantic diatom bloom in spring 2001 |
title_full_unstemmed |
Relative mineralisation of C and Si from biogenic particulate matter in the upper water column during the North East Atlantic diatom bloom in spring 2001 |
title_sort |
relative mineralisation of c and si from biogenic particulate matter in the upper water column during the north east atlantic diatom bloom in spring 2001 |
publishDate |
2006 |
url |
https://eprints.soton.ac.uk/43984/ |
genre |
North Atlantic North East Atlantic |
genre_facet |
North Atlantic North East Atlantic |
op_relation |
Brown, L., Sanders, R. and Savidge, G. (2006) Relative mineralisation of C and Si from biogenic particulate matter in the upper water column during the North East Atlantic diatom bloom in spring 2001. Journal of Marine Systems, 63 (1-2), 79-90. (doi:10.1016/j.jmarsys.2006.03.001 <http://dx.doi.org/10.1016/j.jmarsys.2006.03.001>). |
op_doi |
https://doi.org/10.1016/j.jmarsys.2006.03.001 |
container_title |
Journal of Marine Systems |
container_volume |
63 |
container_issue |
1-2 |
container_start_page |
79 |
op_container_end_page |
90 |
_version_ |
1772817427365625856 |