Selective feeding on natural phytoplankton by Calanus finmarchicus before, during, and after the 1997 spring bloom in the Norwegian Sea
Selective feeding by the calanoid copepod Calanus finmarchicus was investigated during a 3-month study in spring 1997 at a permanent station in the Norwegian Sea (Sta. M, 66�N, 02�E). Phytoplankton biomass increased from 317 ng chlorophyll a (Chl a) liter�1 in the prebloom phase to 2,095 ng liter�1...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.318.4842 2023-05-15T15:47:58+02:00 Selective feeding on natural phytoplankton by Calanus finmarchicus before, during, and after the 1997 spring bloom in the Norwegian Sea Bettina Meyer-harms Xabier Irigoien Robert Head Roger Harris The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.318.4842 http://aslo.org/lo/toc/vol_44/issue_1/0154.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.318.4842 http://aslo.org/lo/toc/vol_44/issue_1/0154.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://aslo.org/lo/toc/vol_44/issue_1/0154.pdf text ftciteseerx 2016-09-04T00:12:14Z Selective feeding by the calanoid copepod Calanus finmarchicus was investigated during a 3-month study in spring 1997 at a permanent station in the Norwegian Sea (Sta. M, 66�N, 02�E). Phytoplankton biomass increased from 317 ng chlorophyll a (Chl a) liter�1 in the prebloom phase to 2,095 ng liter�1 during the bloom and declined after the bloom to 1,260 ng Chl a liter�1. In the prebloom phase, clearance rates of C. finmarchicus females were between 22 and 100 ml copepod�1 d�1, while during the bloom, they ranged from 75 to 92 ml copepod�1 d�1, with a decline in the postbloom phase (41 ml copepod�1 d�1). After the phytoplankton bloom, the C. finmarchicus population was dominated by copepodid stages CIV and CV, with clearance rates ranging from 7 to 23 ml copepod�1 d�1. Grazing rates of adult females on the phytoplankton standing stock were low in the prebloom phases (5–23 Chl a copepod�1 d�1, respectively), increased during the bloom from 82 to 219 ng Chl a copepod�1 d�1, and declined after the bloom (64 ng Chl a copepod�1 d�1 for adult females and 7–27 ng Chl a copepod�1 d�1 for copepodid stages CIV and CV). C. finmarchicus showed a selection for diatoms throughout the study period and for dinoflagellates, before and after the spring bloom, despite the low concentration of both groups in the pre- and postbloom phases. During the postbloom period, no differences were observed in the selective feeding behavior of the copepodid stages compared to the adults. The contribution of diatoms to the overall phytoplankton biomass was 8 and 14 % in the pre- and postbloom periods, respectively, while dinoflagellates were �3%. Haptophytes (dominated by Text Calanus finmarchicus Norwegian Sea Unknown Norwegian Sea |
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Open Polar |
collection |
Unknown |
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English |
description |
Selective feeding by the calanoid copepod Calanus finmarchicus was investigated during a 3-month study in spring 1997 at a permanent station in the Norwegian Sea (Sta. M, 66�N, 02�E). Phytoplankton biomass increased from 317 ng chlorophyll a (Chl a) liter�1 in the prebloom phase to 2,095 ng liter�1 during the bloom and declined after the bloom to 1,260 ng Chl a liter�1. In the prebloom phase, clearance rates of C. finmarchicus females were between 22 and 100 ml copepod�1 d�1, while during the bloom, they ranged from 75 to 92 ml copepod�1 d�1, with a decline in the postbloom phase (41 ml copepod�1 d�1). After the phytoplankton bloom, the C. finmarchicus population was dominated by copepodid stages CIV and CV, with clearance rates ranging from 7 to 23 ml copepod�1 d�1. Grazing rates of adult females on the phytoplankton standing stock were low in the prebloom phases (5–23 Chl a copepod�1 d�1, respectively), increased during the bloom from 82 to 219 ng Chl a copepod�1 d�1, and declined after the bloom (64 ng Chl a copepod�1 d�1 for adult females and 7–27 ng Chl a copepod�1 d�1 for copepodid stages CIV and CV). C. finmarchicus showed a selection for diatoms throughout the study period and for dinoflagellates, before and after the spring bloom, despite the low concentration of both groups in the pre- and postbloom phases. During the postbloom period, no differences were observed in the selective feeding behavior of the copepodid stages compared to the adults. The contribution of diatoms to the overall phytoplankton biomass was 8 and 14 % in the pre- and postbloom periods, respectively, while dinoflagellates were �3%. Haptophytes (dominated by |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Bettina Meyer-harms Xabier Irigoien Robert Head Roger Harris |
spellingShingle |
Bettina Meyer-harms Xabier Irigoien Robert Head Roger Harris Selective feeding on natural phytoplankton by Calanus finmarchicus before, during, and after the 1997 spring bloom in the Norwegian Sea |
author_facet |
Bettina Meyer-harms Xabier Irigoien Robert Head Roger Harris |
author_sort |
Bettina Meyer-harms |
title |
Selective feeding on natural phytoplankton by Calanus finmarchicus before, during, and after the 1997 spring bloom in the Norwegian Sea |
title_short |
Selective feeding on natural phytoplankton by Calanus finmarchicus before, during, and after the 1997 spring bloom in the Norwegian Sea |
title_full |
Selective feeding on natural phytoplankton by Calanus finmarchicus before, during, and after the 1997 spring bloom in the Norwegian Sea |
title_fullStr |
Selective feeding on natural phytoplankton by Calanus finmarchicus before, during, and after the 1997 spring bloom in the Norwegian Sea |
title_full_unstemmed |
Selective feeding on natural phytoplankton by Calanus finmarchicus before, during, and after the 1997 spring bloom in the Norwegian Sea |
title_sort |
selective feeding on natural phytoplankton by calanus finmarchicus before, during, and after the 1997 spring bloom in the norwegian sea |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.318.4842 http://aslo.org/lo/toc/vol_44/issue_1/0154.pdf |
geographic |
Norwegian Sea |
geographic_facet |
Norwegian Sea |
genre |
Calanus finmarchicus Norwegian Sea |
genre_facet |
Calanus finmarchicus Norwegian Sea |
op_source |
http://aslo.org/lo/toc/vol_44/issue_1/0154.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.318.4842 http://aslo.org/lo/toc/vol_44/issue_1/0154.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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