Interactions in the microbial community of the marginal ice zone of the northwestern Weddell Sea through size distribution analysis
Enumeration and identification of planktonic microorganisms (phytoplankton, bacteria, protozoa) were carried out for 16 stations sampled in the marginal ice zone of the northwestern Weddell Sea during sea-ice retreat in 1988 (EPOS Leg 2). From these data, carbon biomass distribution among various cl...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/56972 2023-05-15T18:02:00+02:00 Interactions in the microbial community of the marginal ice zone of the northwestern Weddell Sea through size distribution analysis Becquevort, Sylvie Mathot, Sylvie Lancelot, Christiane 1992 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/56972 https://dipot.ulb.ac.be/dspace/bitstream/2013/56972/1/1992-PB-12-211-218.pdf en eng uri/info:doi/10.1007/BF00238262 uri/info:scp/0027066183 https://dipot.ulb.ac.be/dspace/bitstream/2013/56972/1/1992-PB-12-211-218.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/56972 1 full-text file(s): info:eu-repo/semantics/restrictedAccess Polar biology, 12 (2 Océanographie biologique Océanographie physique et chimique marginal ice zone size distribution microbial community northwestern Weddell sea biomass phytoplankton bacteria protozoa info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 1992 ftunivbruxelles 2022-06-12T20:41:20Z Enumeration and identification of planktonic microorganisms (phytoplankton, bacteria, protozoa) were carried out for 16 stations sampled in the marginal ice zone of the northwestern Weddell Sea during sea-ice retreat in 1988 (EPOS Leg 2). From these data, carbon biomass distribution among various classes, chosen according to size and trophic mode, has been determined. This analysis reveals the general dominance of nano-phytoplankton (74 %), mainly Cryptomonas sp. In two stations only, significant microphytoplanktonic biomass occurred. Bacterioplankton biomass was 16 % of the phytoplanktonic biomass. Protozooplankton appeared as a significant group whose biomass represented an average of 23 % of the total microbial biomass. Maximum phytoplankton and protozooplankton biomass was reached at about 100-150 km north of the receding ice edge whilst bacteria did not show marked spatial variations. From these results, indirect evidence for close relationships between protozoa and bacteria, as well as protozoa and autotrophs, is given. The size range of autotrophic prey and predators overlaps (equivalent spherical diameter range = 6 to 11 μm). This size overlapping increases the complexity of the trophic organization of the microbial community. Our results thus support the idea of a flux of energy not always oriented towards an increasing particle size range. Potential ingestion rate, calculated from a mean clearance rate in the literature, indicated that protozooplankton might ingest as high as 48 % of the daily phytoplankton production in the marginal ice zone. © 1992 Springer-Verlag. info:eu-repo/semantics/published Article in Journal/Newspaper Polar Biology Sea ice Weddell Sea DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) 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 |
Océanographie biologique Océanographie physique et chimique marginal ice zone size distribution microbial community northwestern Weddell sea biomass phytoplankton bacteria protozoa |
spellingShingle |
Océanographie biologique Océanographie physique et chimique marginal ice zone size distribution microbial community northwestern Weddell sea biomass phytoplankton bacteria protozoa Becquevort, Sylvie Mathot, Sylvie Lancelot, Christiane Interactions in the microbial community of the marginal ice zone of the northwestern Weddell Sea through size distribution analysis |
topic_facet |
Océanographie biologique Océanographie physique et chimique marginal ice zone size distribution microbial community northwestern Weddell sea biomass phytoplankton bacteria protozoa |
description |
Enumeration and identification of planktonic microorganisms (phytoplankton, bacteria, protozoa) were carried out for 16 stations sampled in the marginal ice zone of the northwestern Weddell Sea during sea-ice retreat in 1988 (EPOS Leg 2). From these data, carbon biomass distribution among various classes, chosen according to size and trophic mode, has been determined. This analysis reveals the general dominance of nano-phytoplankton (74 %), mainly Cryptomonas sp. In two stations only, significant microphytoplanktonic biomass occurred. Bacterioplankton biomass was 16 % of the phytoplanktonic biomass. Protozooplankton appeared as a significant group whose biomass represented an average of 23 % of the total microbial biomass. Maximum phytoplankton and protozooplankton biomass was reached at about 100-150 km north of the receding ice edge whilst bacteria did not show marked spatial variations. From these results, indirect evidence for close relationships between protozoa and bacteria, as well as protozoa and autotrophs, is given. The size range of autotrophic prey and predators overlaps (equivalent spherical diameter range = 6 to 11 μm). This size overlapping increases the complexity of the trophic organization of the microbial community. Our results thus support the idea of a flux of energy not always oriented towards an increasing particle size range. Potential ingestion rate, calculated from a mean clearance rate in the literature, indicated that protozooplankton might ingest as high as 48 % of the daily phytoplankton production in the marginal ice zone. © 1992 Springer-Verlag. info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Becquevort, Sylvie Mathot, Sylvie Lancelot, Christiane |
author_facet |
Becquevort, Sylvie Mathot, Sylvie Lancelot, Christiane |
author_sort |
Becquevort, Sylvie |
title |
Interactions in the microbial community of the marginal ice zone of the northwestern Weddell Sea through size distribution analysis |
title_short |
Interactions in the microbial community of the marginal ice zone of the northwestern Weddell Sea through size distribution analysis |
title_full |
Interactions in the microbial community of the marginal ice zone of the northwestern Weddell Sea through size distribution analysis |
title_fullStr |
Interactions in the microbial community of the marginal ice zone of the northwestern Weddell Sea through size distribution analysis |
title_full_unstemmed |
Interactions in the microbial community of the marginal ice zone of the northwestern Weddell Sea through size distribution analysis |
title_sort |
interactions in the microbial community of the marginal ice zone of the northwestern weddell sea through size distribution analysis |
publishDate |
1992 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/56972 https://dipot.ulb.ac.be/dspace/bitstream/2013/56972/1/1992-PB-12-211-218.pdf |
geographic |
Weddell Weddell Sea |
geographic_facet |
Weddell Weddell Sea |
genre |
Polar Biology Sea ice Weddell Sea |
genre_facet |
Polar Biology Sea ice Weddell Sea |
op_source |
Polar biology, 12 (2 |
op_relation |
uri/info:doi/10.1007/BF00238262 uri/info:scp/0027066183 https://dipot.ulb.ac.be/dspace/bitstream/2013/56972/1/1992-PB-12-211-218.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/56972 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/restrictedAccess |
_version_ |
1766171611266809856 |