Gross and net primary production in the Scotia-Weddell Sea sector of the Southern Ocean during spring 1988
Daily rates of gross and net primary production were calculated in the Scotia-Weddell Sea sector of the Southern Ocean during spring 1988 (EPOS, Leg 2) on the basis of kinetic experiments, which combine radiotracer technology and classic biochemical procedures, and by taking into account the light r...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
1992
|
Subjects: | |
Online Access: | http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/56973 https://dipot.ulb.ac.be/dspace/bitstream/2013/56973/1/1992-PB-12-321-332.pdf |
id |
ftunivbruxelles:oai:dipot.ulb.ac.be:2013/56973 |
---|---|
record_format |
openpolar |
spelling |
ftunivbruxelles:oai:dipot.ulb.ac.be:2013/56973 2023-05-15T18:02:00+02:00 Gross and net primary production in the Scotia-Weddell Sea sector of the Southern Ocean during spring 1988 Mathot, Sylvie Lancelot, Christiane Dandois, Jean-Michel 1992-09-01 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/56973 https://dipot.ulb.ac.be/dspace/bitstream/2013/56973/1/1992-PB-12-321-332.pdf en eng uri/info:doi/10.1007/BF00238275 uri/info:scp/0027097401 https://dipot.ulb.ac.be/dspace/bitstream/2013/56973/1/1992-PB-12-321-332.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/56973 1 full-text file(s): info:eu-repo/semantics/closedAccess Polar biology, 12 (2 Phytoplanctonologie Océanographie biologique gross net primary production southern ocean Weddell ice zone marginal closed pack open CPIZ OOZ MIZ info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 1992 ftunivbruxelles 2022-06-12T20:41:20Z Daily rates of gross and net primary production were calculated in the Scotia-Weddell Sea sector of the Southern Ocean during spring 1988 (EPOS, Leg 2) on the basis of kinetic experiments, which combine radiotracer technology and classic biochemical procedures, and by taking into account the light regime, the physical structure of the water column, the vertical distribution of chlorophyll a, and the protozoan grazing pressure. From these calculations, three distinct sub-areas were identified: the Closed Pack Ice Zone (CPIZ), characterized by the lowest average gross primary production (0.36 gC · m–2 · day–1); the Marginal Ice Zone (MIZ) with a maximum mean value of 1.76 gC · m–2 · day–1; and the Open Ocean Zone off the ice edge (OOZ) with an intermediate mean value of 0.87 gC · m–2 · day–1. Net primary production fluctuated nearly in the same proportions, averaging 0.55, 0.2 and 1.13 gC · m–2 · day–1 in the OOZ, CPIZ and MIZ respectively, representing 53% of the total photo-assimilated carbon under heavy ice cover (CPIZ) and 64% in the two other areas. Available light, strongly dependent on the ice cover, was shown to control the level of primary production in the sea ice associated sub-areas, whilst protozoa grazing on phytoplankton determined the moderate primary production level characteristic of the ldquowell illuminatedrdquo OOZ area. Data presented here were collected during the European Polarstern Study (EPOS) sponsored by the European Science Foundation info:eu-repo/semantics/published Article in Journal/Newspaper Polar Biology Sea ice Southern Ocean Weddell Sea DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Southern Ocean Weddell Weddell Sea |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Phytoplanctonologie Océanographie biologique gross net primary production southern ocean Weddell ice zone marginal closed pack open CPIZ OOZ MIZ |
spellingShingle |
Phytoplanctonologie Océanographie biologique gross net primary production southern ocean Weddell ice zone marginal closed pack open CPIZ OOZ MIZ Mathot, Sylvie Lancelot, Christiane Dandois, Jean-Michel Gross and net primary production in the Scotia-Weddell Sea sector of the Southern Ocean during spring 1988 |
topic_facet |
Phytoplanctonologie Océanographie biologique gross net primary production southern ocean Weddell ice zone marginal closed pack open CPIZ OOZ MIZ |
description |
Daily rates of gross and net primary production were calculated in the Scotia-Weddell Sea sector of the Southern Ocean during spring 1988 (EPOS, Leg 2) on the basis of kinetic experiments, which combine radiotracer technology and classic biochemical procedures, and by taking into account the light regime, the physical structure of the water column, the vertical distribution of chlorophyll a, and the protozoan grazing pressure. From these calculations, three distinct sub-areas were identified: the Closed Pack Ice Zone (CPIZ), characterized by the lowest average gross primary production (0.36 gC · m–2 · day–1); the Marginal Ice Zone (MIZ) with a maximum mean value of 1.76 gC · m–2 · day–1; and the Open Ocean Zone off the ice edge (OOZ) with an intermediate mean value of 0.87 gC · m–2 · day–1. Net primary production fluctuated nearly in the same proportions, averaging 0.55, 0.2 and 1.13 gC · m–2 · day–1 in the OOZ, CPIZ and MIZ respectively, representing 53% of the total photo-assimilated carbon under heavy ice cover (CPIZ) and 64% in the two other areas. Available light, strongly dependent on the ice cover, was shown to control the level of primary production in the sea ice associated sub-areas, whilst protozoa grazing on phytoplankton determined the moderate primary production level characteristic of the ldquowell illuminatedrdquo OOZ area. Data presented here were collected during the European Polarstern Study (EPOS) sponsored by the European Science Foundation info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Mathot, Sylvie Lancelot, Christiane Dandois, Jean-Michel |
author_facet |
Mathot, Sylvie Lancelot, Christiane Dandois, Jean-Michel |
author_sort |
Mathot, Sylvie |
title |
Gross and net primary production in the Scotia-Weddell Sea sector of the Southern Ocean during spring 1988 |
title_short |
Gross and net primary production in the Scotia-Weddell Sea sector of the Southern Ocean during spring 1988 |
title_full |
Gross and net primary production in the Scotia-Weddell Sea sector of the Southern Ocean during spring 1988 |
title_fullStr |
Gross and net primary production in the Scotia-Weddell Sea sector of the Southern Ocean during spring 1988 |
title_full_unstemmed |
Gross and net primary production in the Scotia-Weddell Sea sector of the Southern Ocean during spring 1988 |
title_sort |
gross and net primary production in the scotia-weddell sea sector of the southern ocean during spring 1988 |
publishDate |
1992 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/56973 https://dipot.ulb.ac.be/dspace/bitstream/2013/56973/1/1992-PB-12-321-332.pdf |
geographic |
Southern Ocean Weddell Weddell Sea |
geographic_facet |
Southern Ocean Weddell Weddell Sea |
genre |
Polar Biology Sea ice Southern Ocean Weddell Sea |
genre_facet |
Polar Biology Sea ice Southern Ocean Weddell Sea |
op_source |
Polar biology, 12 (2 |
op_relation |
uri/info:doi/10.1007/BF00238275 uri/info:scp/0027097401 https://dipot.ulb.ac.be/dspace/bitstream/2013/56973/1/1992-PB-12-321-332.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/56973 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/closedAccess |
_version_ |
1766171611468136448 |