Changes in the C, N, and P cycles by the predicted salps-krill shift in the southern ocean
13 pages, 3 figures, 6 tables The metabolic carbon requirements and excretion rates of three major zooplankton groups in the Southern Ocean were studied in the vicinity of the Antarctic Peninsula in February 2009. The research was conducted in the framework of the ATOS project (POL2006-00550/CTM), a...
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Online Access: | http://hdl.handle.net/10261/108732 https://doi.org/10.3389/fmars.2014.00045 |
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ftcsic:oai:digital.csic.es:10261/108732 2024-02-11T09:56:23+01:00 Changes in the C, N, and P cycles by the predicted salps-krill shift in the southern ocean Alcaraz, Miquel Almeda, Rodrigo Duarte, Carlos M. Horstkotte, Burkhard Lasternas, Sebastien Agustí, Susana 2014-09-29 http://hdl.handle.net/10261/108732 https://doi.org/10.3389/fmars.2014.00045 unknown Frontiers Media https://doi.org/10.3389/fmars.2014.00045 doi:10.3389/fmars.2014.00045 e-issn: 2296-7745 Frontiers in Marine Science 1: 1-13 (2014) http://hdl.handle.net/10261/108732 open Southern Ocean Zooplankton Community shifts Metabolism Carbon cycling C:N:P stoichiometry artículo http://purl.org/coar/resource_type/c_6501 2014 ftcsic https://doi.org/10.3389/fmars.2014.00045 2024-01-16T10:04:17Z 13 pages, 3 figures, 6 tables The metabolic carbon requirements and excretion rates of three major zooplankton groups in the Southern Ocean were studied in the vicinity of the Antarctic Peninsula in February 2009. The research was conducted in the framework of the ATOS project (POL2006-00550/CTM), as part of the Spanish contribution to the International Polar Year. Our objective was to ascertain the possible consequences of changes on size spectrum and community structure of the Southern Ocean zooplankton for the cycling of biogenic carbon and the stoichiometry of dissolved inorganic nutrients. The carbon respiratory demands and NH4-N and PO4-P excretion rates of < 5 mm size copepods, krill (represented by furcilia spp. and adult Euphausia superba) and salps (blastozoids of Salpa thompsoni) were estimated by incubation experiments. The respiration rates and N:P metabolic quotients of salps were more than twice those of krill (furcilia spp. and adults) and copepods. The possible community shift from krill to salps in the Southern Ocean would therefore encompass not only the substitution of a pivotal zooplankton group (krill) by one with an apparently indifferent role in Antarctic food webs and with higher specific metabolic carbon demands (salps), but the changes in the proportion of zooplankton-recycled N and P would modify the N:P stoichiometry of the dissolved nutrient pool, thus inducing changes in the functional and structural properties of phytoplankton that would translate to the whole Southern Ocean ecosystem This work was supported by the Spanish funded projects ATOS (POL 2006-0550/CTM) to Carlos M. Duarte, PERFIL (CTM 2006-12344-C01) to Miquel Alcaraz, and the UE funded project ATP (www.eu-atp.org) contract # 226248 to P. Wassmann Peer Reviewed Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Euphausia superba International Polar Year Southern Ocean Copepods Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Peninsula Duarte ENVELOPE(-60.950,-60.950,-64.200,-64.200) Southern Ocean The Antarctic Frontiers in Marine Science 1 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Southern Ocean Zooplankton Community shifts Metabolism Carbon cycling C:N:P stoichiometry |
spellingShingle |
Southern Ocean Zooplankton Community shifts Metabolism Carbon cycling C:N:P stoichiometry Alcaraz, Miquel Almeda, Rodrigo Duarte, Carlos M. Horstkotte, Burkhard Lasternas, Sebastien Agustí, Susana Changes in the C, N, and P cycles by the predicted salps-krill shift in the southern ocean |
topic_facet |
Southern Ocean Zooplankton Community shifts Metabolism Carbon cycling C:N:P stoichiometry |
description |
13 pages, 3 figures, 6 tables The metabolic carbon requirements and excretion rates of three major zooplankton groups in the Southern Ocean were studied in the vicinity of the Antarctic Peninsula in February 2009. The research was conducted in the framework of the ATOS project (POL2006-00550/CTM), as part of the Spanish contribution to the International Polar Year. Our objective was to ascertain the possible consequences of changes on size spectrum and community structure of the Southern Ocean zooplankton for the cycling of biogenic carbon and the stoichiometry of dissolved inorganic nutrients. The carbon respiratory demands and NH4-N and PO4-P excretion rates of < 5 mm size copepods, krill (represented by furcilia spp. and adult Euphausia superba) and salps (blastozoids of Salpa thompsoni) were estimated by incubation experiments. The respiration rates and N:P metabolic quotients of salps were more than twice those of krill (furcilia spp. and adults) and copepods. The possible community shift from krill to salps in the Southern Ocean would therefore encompass not only the substitution of a pivotal zooplankton group (krill) by one with an apparently indifferent role in Antarctic food webs and with higher specific metabolic carbon demands (salps), but the changes in the proportion of zooplankton-recycled N and P would modify the N:P stoichiometry of the dissolved nutrient pool, thus inducing changes in the functional and structural properties of phytoplankton that would translate to the whole Southern Ocean ecosystem This work was supported by the Spanish funded projects ATOS (POL 2006-0550/CTM) to Carlos M. Duarte, PERFIL (CTM 2006-12344-C01) to Miquel Alcaraz, and the UE funded project ATP (www.eu-atp.org) contract # 226248 to P. Wassmann Peer Reviewed |
format |
Article in Journal/Newspaper |
author |
Alcaraz, Miquel Almeda, Rodrigo Duarte, Carlos M. Horstkotte, Burkhard Lasternas, Sebastien Agustí, Susana |
author_facet |
Alcaraz, Miquel Almeda, Rodrigo Duarte, Carlos M. Horstkotte, Burkhard Lasternas, Sebastien Agustí, Susana |
author_sort |
Alcaraz, Miquel |
title |
Changes in the C, N, and P cycles by the predicted salps-krill shift in the southern ocean |
title_short |
Changes in the C, N, and P cycles by the predicted salps-krill shift in the southern ocean |
title_full |
Changes in the C, N, and P cycles by the predicted salps-krill shift in the southern ocean |
title_fullStr |
Changes in the C, N, and P cycles by the predicted salps-krill shift in the southern ocean |
title_full_unstemmed |
Changes in the C, N, and P cycles by the predicted salps-krill shift in the southern ocean |
title_sort |
changes in the c, n, and p cycles by the predicted salps-krill shift in the southern ocean |
publisher |
Frontiers Media |
publishDate |
2014 |
url |
http://hdl.handle.net/10261/108732 https://doi.org/10.3389/fmars.2014.00045 |
long_lat |
ENVELOPE(-60.950,-60.950,-64.200,-64.200) |
geographic |
Antarctic Antarctic Peninsula Duarte Southern Ocean The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Duarte Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Euphausia superba International Polar Year Southern Ocean Copepods |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Euphausia superba International Polar Year Southern Ocean Copepods |
op_relation |
https://doi.org/10.3389/fmars.2014.00045 doi:10.3389/fmars.2014.00045 e-issn: 2296-7745 Frontiers in Marine Science 1: 1-13 (2014) http://hdl.handle.net/10261/108732 |
op_rights |
open |
op_doi |
https://doi.org/10.3389/fmars.2014.00045 |
container_title |
Frontiers in Marine Science |
container_volume |
1 |
_version_ |
1790602780356902912 |