Pyruvate kinase activity as index of carbohydrate assimilation by mesozooplankton: an early field implementation in the Bay of Biscay,NE Atlantic
Estimates of carbohydrate assimilation within the mesozooplankton compartment are a fundamental concern in oceanography because they give a general expression of the biologically-regulated incorporation of metabolic fuel produced from inorganic nutrients by phytoplankton in the sea. A new tool is pr...
Published in: | Journal of Plankton Research |
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fthighwire:oai:open-archive.highwire.org:plankt:23/2/157 2023-05-15T17:38:31+02:00 Pyruvate kinase activity as index of carbohydrate assimilation by mesozooplankton: an early field implementation in the Bay of Biscay,NE Atlantic Bergeron, Jean-Pierre Herbland, Alain 2001-02-01 00:00:00.0 text/html http://plankt.oxfordjournals.org/cgi/content/short/23/2/157 https://doi.org/10.1093/plankt/23.2.157 en eng Oxford University Press http://plankt.oxfordjournals.org/cgi/content/short/23/2/157 http://dx.doi.org/10.1093/plankt/23.2.157 Copyright (C) 2001, Oxford University Press ORIGINAL ARTICLES TEXT 2001 fthighwire https://doi.org/10.1093/plankt/23.2.157 2013-05-26T16:23:09Z Estimates of carbohydrate assimilation within the mesozooplankton compartment are a fundamental concern in oceanography because they give a general expression of the biologically-regulated incorporation of metabolic fuel produced from inorganic nutrients by phytoplankton in the sea. A new tool is proposed for the assessment of such processes. It is based on the measurement of the activity of an enzyme, pyruvate kinase (PK), on samples of the whole mesozooplankton community. Here, the results are presented of an early attempt at such an implementation in the Bay of Biscay (north-east Atlantic) in springtime. A main area situated in front of an estuary (Gironde) has been extensively studied—the same sampling grid was covered on three occasions (two 20 day time lags between each). Strong mesozooplankton PK activities were related to high values of nitrates or chlorophyll a; the inverse was also true. A significant correlation has been found between thermal stratification and enzyme activity. On a brooder scale, in the southern part of the Bay of Biscay continental shelf, the overall significant influence of de-salted water coming from rivers was revealed by spatial variations in mesozooplankton PK activities. The whole dataset suggests that this new tool should be potentially very useful in certain future studies, especially in fisheries oceanography which often requires characterization of mesoscale features. Text North East Atlantic HighWire Press (Stanford University) Journal of Plankton Research 23 2 157 163 |
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HighWire Press (Stanford University) |
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language |
English |
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ORIGINAL ARTICLES |
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ORIGINAL ARTICLES Bergeron, Jean-Pierre Herbland, Alain Pyruvate kinase activity as index of carbohydrate assimilation by mesozooplankton: an early field implementation in the Bay of Biscay,NE Atlantic |
topic_facet |
ORIGINAL ARTICLES |
description |
Estimates of carbohydrate assimilation within the mesozooplankton compartment are a fundamental concern in oceanography because they give a general expression of the biologically-regulated incorporation of metabolic fuel produced from inorganic nutrients by phytoplankton in the sea. A new tool is proposed for the assessment of such processes. It is based on the measurement of the activity of an enzyme, pyruvate kinase (PK), on samples of the whole mesozooplankton community. Here, the results are presented of an early attempt at such an implementation in the Bay of Biscay (north-east Atlantic) in springtime. A main area situated in front of an estuary (Gironde) has been extensively studied—the same sampling grid was covered on three occasions (two 20 day time lags between each). Strong mesozooplankton PK activities were related to high values of nitrates or chlorophyll a; the inverse was also true. A significant correlation has been found between thermal stratification and enzyme activity. On a brooder scale, in the southern part of the Bay of Biscay continental shelf, the overall significant influence of de-salted water coming from rivers was revealed by spatial variations in mesozooplankton PK activities. The whole dataset suggests that this new tool should be potentially very useful in certain future studies, especially in fisheries oceanography which often requires characterization of mesoscale features. |
format |
Text |
author |
Bergeron, Jean-Pierre Herbland, Alain |
author_facet |
Bergeron, Jean-Pierre Herbland, Alain |
author_sort |
Bergeron, Jean-Pierre |
title |
Pyruvate kinase activity as index of carbohydrate assimilation by mesozooplankton: an early field implementation in the Bay of Biscay,NE Atlantic |
title_short |
Pyruvate kinase activity as index of carbohydrate assimilation by mesozooplankton: an early field implementation in the Bay of Biscay,NE Atlantic |
title_full |
Pyruvate kinase activity as index of carbohydrate assimilation by mesozooplankton: an early field implementation in the Bay of Biscay,NE Atlantic |
title_fullStr |
Pyruvate kinase activity as index of carbohydrate assimilation by mesozooplankton: an early field implementation in the Bay of Biscay,NE Atlantic |
title_full_unstemmed |
Pyruvate kinase activity as index of carbohydrate assimilation by mesozooplankton: an early field implementation in the Bay of Biscay,NE Atlantic |
title_sort |
pyruvate kinase activity as index of carbohydrate assimilation by mesozooplankton: an early field implementation in the bay of biscay,ne atlantic |
publisher |
Oxford University Press |
publishDate |
2001 |
url |
http://plankt.oxfordjournals.org/cgi/content/short/23/2/157 https://doi.org/10.1093/plankt/23.2.157 |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_relation |
http://plankt.oxfordjournals.org/cgi/content/short/23/2/157 http://dx.doi.org/10.1093/plankt/23.2.157 |
op_rights |
Copyright (C) 2001, Oxford University Press |
op_doi |
https://doi.org/10.1093/plankt/23.2.157 |
container_title |
Journal of Plankton Research |
container_volume |
23 |
container_issue |
2 |
container_start_page |
157 |
op_container_end_page |
163 |
_version_ |
1766138990101004288 |