A comparative study of size-fractionated mesozooplankton biomass and grazing in the North East Atlantic
Measurements of biomass and grazing for three size classes of mesozooplankton were carried out at two drifting stations: at 59°N, 20°W during a tracer release experiment, and at 37°N, 19°W at a conventional drifting station. Mesozooplankton biomass at 59°N did not vary between day and night (6.7 and...
Published in: | Journal of Plankton Research |
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Oxford University Press
1999
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fthighwire:oai:open-archive.highwire.org:plankt:21/12/2285 2023-05-15T17:35:13+02:00 A comparative study of size-fractionated mesozooplankton biomass and grazing in the North East Atlantic Head, R.N. Harris, R.P. Bonnet, D. Irigoien, X. 1999-12-01 00:00:00.0 text/html http://plankt.oxfordjournals.org/cgi/content/short/21/12/2285 https://doi.org/10.1093/plankt/21.12.2285 en eng Oxford University Press http://plankt.oxfordjournals.org/cgi/content/short/21/12/2285 http://dx.doi.org/10.1093/plankt/21.12.2285 Copyright (C) 1999, Oxford University Press ORIGINAL ARTICLES TEXT 1999 fthighwire https://doi.org/10.1093/plankt/21.12.2285 2016-11-16T19:02:37Z Measurements of biomass and grazing for three size classes of mesozooplankton were carried out at two drifting stations: at 59°N, 20°W during a tracer release experiment, and at 37°N, 19°W at a conventional drifting station. Mesozooplankton biomass at 59°N did not vary between day and night (6.7 and 6.4 mg C m–3 for night and day samples, respectively). At 37°N, carbon biomass was much lower and in addition a diel cycle was observed (2.2 and 1.4 mg C m–3 for night and day samples, respectively). No one size fraction was the major contributor to biomass at either station. At 59°N, grazing was dominated by the small size fraction for both day and night samples, and at 37°N grazing was dominated by this size fraction during the day only. At 59°N, mean ingestion (57.1 and 91.1 mg C m–2 day–1 for day and night samples, respectively) was much higher than at 37°N (5.3 and 1.7 mg C m–2 day–1 for day and night samples, respectively). Consumption of the standing stock of phytoplankton (based on total chlorophyll a concentrations) was higher at the southern station where 8.9% and 2.6% day–1 of the standing stock was removed by night and day, respectively. Reverse diel consumption was observed at the northern station, where 1.5% (night) and 2.1% day–1 (day) of the standing stock was removed. Comparisons are made between the two time series, and the results are set in the context of a decade of investigations into the role of mesozooplankton in this region of the North Atlantic. Text North Atlantic North East Atlantic HighWire Press (Stanford University) Journal of Plankton Research 21 12 2285 2308 |
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HighWire Press (Stanford University) |
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fthighwire |
language |
English |
topic |
ORIGINAL ARTICLES |
spellingShingle |
ORIGINAL ARTICLES Head, R.N. Harris, R.P. Bonnet, D. Irigoien, X. A comparative study of size-fractionated mesozooplankton biomass and grazing in the North East Atlantic |
topic_facet |
ORIGINAL ARTICLES |
description |
Measurements of biomass and grazing for three size classes of mesozooplankton were carried out at two drifting stations: at 59°N, 20°W during a tracer release experiment, and at 37°N, 19°W at a conventional drifting station. Mesozooplankton biomass at 59°N did not vary between day and night (6.7 and 6.4 mg C m–3 for night and day samples, respectively). At 37°N, carbon biomass was much lower and in addition a diel cycle was observed (2.2 and 1.4 mg C m–3 for night and day samples, respectively). No one size fraction was the major contributor to biomass at either station. At 59°N, grazing was dominated by the small size fraction for both day and night samples, and at 37°N grazing was dominated by this size fraction during the day only. At 59°N, mean ingestion (57.1 and 91.1 mg C m–2 day–1 for day and night samples, respectively) was much higher than at 37°N (5.3 and 1.7 mg C m–2 day–1 for day and night samples, respectively). Consumption of the standing stock of phytoplankton (based on total chlorophyll a concentrations) was higher at the southern station where 8.9% and 2.6% day–1 of the standing stock was removed by night and day, respectively. Reverse diel consumption was observed at the northern station, where 1.5% (night) and 2.1% day–1 (day) of the standing stock was removed. Comparisons are made between the two time series, and the results are set in the context of a decade of investigations into the role of mesozooplankton in this region of the North Atlantic. |
format |
Text |
author |
Head, R.N. Harris, R.P. Bonnet, D. Irigoien, X. |
author_facet |
Head, R.N. Harris, R.P. Bonnet, D. Irigoien, X. |
author_sort |
Head, R.N. |
title |
A comparative study of size-fractionated mesozooplankton biomass and grazing in the North East Atlantic |
title_short |
A comparative study of size-fractionated mesozooplankton biomass and grazing in the North East Atlantic |
title_full |
A comparative study of size-fractionated mesozooplankton biomass and grazing in the North East Atlantic |
title_fullStr |
A comparative study of size-fractionated mesozooplankton biomass and grazing in the North East Atlantic |
title_full_unstemmed |
A comparative study of size-fractionated mesozooplankton biomass and grazing in the North East Atlantic |
title_sort |
comparative study of size-fractionated mesozooplankton biomass and grazing in the north east atlantic |
publisher |
Oxford University Press |
publishDate |
1999 |
url |
http://plankt.oxfordjournals.org/cgi/content/short/21/12/2285 https://doi.org/10.1093/plankt/21.12.2285 |
genre |
North Atlantic North East Atlantic |
genre_facet |
North Atlantic North East Atlantic |
op_relation |
http://plankt.oxfordjournals.org/cgi/content/short/21/12/2285 http://dx.doi.org/10.1093/plankt/21.12.2285 |
op_rights |
Copyright (C) 1999, Oxford University Press |
op_doi |
https://doi.org/10.1093/plankt/21.12.2285 |
container_title |
Journal of Plankton Research |
container_volume |
21 |
container_issue |
12 |
container_start_page |
2285 |
op_container_end_page |
2308 |
_version_ |
1766134291984547840 |