Copepod grazing and its potential impact on the phytoplankton development in the Barents Sea
Compiled data from published and unpublished sources on copepod grazing of the large-sized copepods in the Barents Sea give wide ranges in grazing rates. Approximate average values indicate daily rations of 7–18% for copepodite stages V and VI and considerably higher values for the earliest copepodi...
Published in: | Polar Research |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Norwegian Polar Institute
1991
|
Subjects: | |
Online Access: | https://polarresearch.net/index.php/polar/article/view/2322 https://doi.org/10.3402/polar.v10i2.6751 |
id |
ftjpolarres:oai:journals.openacademia.net:article/2322 |
---|---|
record_format |
openpolar |
spelling |
ftjpolarres:oai:journals.openacademia.net:article/2322 2023-05-15T15:38:40+02:00 Copepod grazing and its potential impact on the phytoplankton development in the Barents Sea Båmstedt, Ulf Eilertsen, Hans Christian Tande, Kurt S. Slagstad, Dag Skjoldal, Hein Rune 1991-01-12 application/pdf https://polarresearch.net/index.php/polar/article/view/2322 https://doi.org/10.3402/polar.v10i2.6751 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2322/5572 https://polarresearch.net/index.php/polar/article/view/2322 doi:10.3402/polar.v10i2.6751 Copyright (c) 2018 Polar Research Polar Research; Vol. 10 No. 2 (1991): Special issue: Proceedings of the Pro Mare Symposium on Polar Marine Ecology. Part 2; 339-354 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1991 ftjpolarres https://doi.org/10.3402/polar.v10i2.6751 2021-11-11T19:12:32Z Compiled data from published and unpublished sources on copepod grazing of the large-sized copepods in the Barents Sea give wide ranges in grazing rates. Approximate average values indicate daily rations of 7–18% for copepodite stages V and VI and considerably higher values for the earliest copepodite stages. It is demonstrated that individual variability in gut fullness of copepods from a given locality is typically very high and not closely related to variable food abundance or depth of occurrence. There is no diel feeding rhythm during the summer, and even when relating copepod grazing to a number of biotic and abiotic factors through stepwise linear regression analysis, much of the variability remains unexplained. It is suggested that feeding behaviour, food quality and feeding history of the copepods all play important roles as factors which regulate copepod grazing. Model simulations on the phytoplankton succession, using literature data on laboratory-determined growth characteristics for solitary cells and colonies of the prymnesiophyte Phaeocystis pouchetii and large diatoms, indicate that the extent of the mixed layer and selective grazing by zooplankton are important factors that may explain the occurrence of dense blooms of P. pouchetii colonies, frequently observed during the spring. Article in Journal/Newspaper Barents Sea Polar Research Copepods Polar Research (E-Journal) Barents Sea Polar Research 10 2 339 354 |
institution |
Open Polar |
collection |
Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
description |
Compiled data from published and unpublished sources on copepod grazing of the large-sized copepods in the Barents Sea give wide ranges in grazing rates. Approximate average values indicate daily rations of 7–18% for copepodite stages V and VI and considerably higher values for the earliest copepodite stages. It is demonstrated that individual variability in gut fullness of copepods from a given locality is typically very high and not closely related to variable food abundance or depth of occurrence. There is no diel feeding rhythm during the summer, and even when relating copepod grazing to a number of biotic and abiotic factors through stepwise linear regression analysis, much of the variability remains unexplained. It is suggested that feeding behaviour, food quality and feeding history of the copepods all play important roles as factors which regulate copepod grazing. Model simulations on the phytoplankton succession, using literature data on laboratory-determined growth characteristics for solitary cells and colonies of the prymnesiophyte Phaeocystis pouchetii and large diatoms, indicate that the extent of the mixed layer and selective grazing by zooplankton are important factors that may explain the occurrence of dense blooms of P. pouchetii colonies, frequently observed during the spring. |
format |
Article in Journal/Newspaper |
author |
Båmstedt, Ulf Eilertsen, Hans Christian Tande, Kurt S. Slagstad, Dag Skjoldal, Hein Rune |
spellingShingle |
Båmstedt, Ulf Eilertsen, Hans Christian Tande, Kurt S. Slagstad, Dag Skjoldal, Hein Rune Copepod grazing and its potential impact on the phytoplankton development in the Barents Sea |
author_facet |
Båmstedt, Ulf Eilertsen, Hans Christian Tande, Kurt S. Slagstad, Dag Skjoldal, Hein Rune |
author_sort |
Båmstedt, Ulf |
title |
Copepod grazing and its potential impact on the phytoplankton development in the Barents Sea |
title_short |
Copepod grazing and its potential impact on the phytoplankton development in the Barents Sea |
title_full |
Copepod grazing and its potential impact on the phytoplankton development in the Barents Sea |
title_fullStr |
Copepod grazing and its potential impact on the phytoplankton development in the Barents Sea |
title_full_unstemmed |
Copepod grazing and its potential impact on the phytoplankton development in the Barents Sea |
title_sort |
copepod grazing and its potential impact on the phytoplankton development in the barents sea |
publisher |
Norwegian Polar Institute |
publishDate |
1991 |
url |
https://polarresearch.net/index.php/polar/article/view/2322 https://doi.org/10.3402/polar.v10i2.6751 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Polar Research Copepods |
genre_facet |
Barents Sea Polar Research Copepods |
op_source |
Polar Research; Vol. 10 No. 2 (1991): Special issue: Proceedings of the Pro Mare Symposium on Polar Marine Ecology. Part 2; 339-354 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2322/5572 https://polarresearch.net/index.php/polar/article/view/2322 doi:10.3402/polar.v10i2.6751 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v10i2.6751 |
container_title |
Polar Research |
container_volume |
10 |
container_issue |
2 |
container_start_page |
339 |
op_container_end_page |
354 |
_version_ |
1766369901249822720 |