The role of arctic zooplankton in biogeochemical cycles: Respiration and excretion of ammonia and phosphate during summer
The study of the structural and functional properties of key components of polar marine ecosystems has received increased attention in order to better understand the ecological consequences of future sea temperature rise and seasonal ice retraction. Owing to this purpose, during the ATOS-Arctic cruise, held in July 2007 in the framework of the 2007-2008 International Polar Year, we studied the respiratory carbon demand of mesozooplankton as well as their contribution to the regeneration of inorganic nitrogen and phosphorus (NH4-N and PO4-P) via excretion. The studied area comprised several stations along a latitudinal gradient in the East Greenland current, plus a network of stations NW of the Svalbard islands. The specific respiratory carbon losses and phosphorus (PO4-P) excretion rates were similar or slightly higher than some reports for Arctic mesozooplankton, but the nitrogen (NH4-N) excretion rates were higher by a factor of 3 when compared with previous data sets. The mesozooplankton respiratory losses were equivalent to 23% of primary production, and at turn zooplankton contributed by excretion to more than 50% of the N and P required by phytoplankton. Although C:N, C:P and N:P metabolic atomic quotients almost coincided with the average Redfield's stoichiometric ratios, the low C:N values when compared to previous reports suggested a predominance of protein-related metabolic substrates. The potential consequences of changes observed in the C:N, N:P and C:P metabolic ratios of mesozooplankton for Arctic marine ecosystems are discussed. © 2010 Springer-Verlag.
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dig-icm-es-10261-603622019-03-06T12:02:06Z The role of arctic zooplankton in biogeochemical cycles: Respiration and excretion of ammonia and phosphate during summer Alcaraz, Miquel Almeda, Rodrigo Calbet, Albert Saiz, Enric Duarte, Carlos M. Lasternas, Sebastien Agustí, Susana Santiago, Reyes de Movilla, Juan Ignacio Alonso, A. The study of the structural and functional properties of key components of polar marine ecosystems has received increased attention in order to better understand the ecological consequences of future sea temperature rise and seasonal ice retraction. Owing to this purpose, during the ATOS-Arctic cruise, held in July 2007 in the framework of the 2007-2008 International Polar Year, we studied the respiratory carbon demand of mesozooplankton as well as their contribution to the regeneration of inorganic nitrogen and phosphorus (NH4-N and PO4-P) via excretion. The studied area comprised several stations along a latitudinal gradient in the East Greenland current, plus a network of stations NW of the Svalbard islands. The specific respiratory carbon losses and phosphorus (PO4-P) excretion rates were similar or slightly higher than some reports for Arctic mesozooplankton, but the nitrogen (NH4-N) excretion rates were higher by a factor of 3 when compared with previous data sets. The mesozooplankton respiratory losses were equivalent to 23% of primary production, and at turn zooplankton contributed by excretion to more than 50% of the N and P required by phytoplankton. Although C:N, C:P and N:P metabolic atomic quotients almost coincided with the average Redfield's stoichiometric ratios, the low C:N values when compared to previous reports suggested a predominance of protein-related metabolic substrates. The potential consequences of changes observed in the C:N, N:P and C:P metabolic ratios of mesozooplankton for Arctic marine ecosystems are discussed. © 2010 Springer-Verlag. This research was supported by the Spanish grants POL2006-0550/CTM to C. D, CTM2006-12344-C02-01 to M. A., 2005SGR-00219 from the Generalitat de Catalunya to M. A, A. C. and E. S., and a PhD fellowship, BES-2005-7491 to RA. Peer Reviewed 2012-11-15T15:26:35Z 2012-11-15T15:26:35Z 2010 2012-11-15T15:26:35Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1007/s00300-010-0789-9 issn: 0722-4060 Polar Biology 33: 1719- 1731 (2010) http://hdl.handle.net/10261/60362 10.1007/s00300-010-0789-9 en open Springer |
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The study of the structural and functional properties of key components of polar marine ecosystems has received increased attention in order to better understand the ecological consequences of future sea temperature rise and seasonal ice retraction. Owing to this purpose, during the ATOS-Arctic cruise, held in July 2007 in the framework of the 2007-2008 International Polar Year, we studied the respiratory carbon demand of mesozooplankton as well as their contribution to the regeneration of inorganic nitrogen and phosphorus (NH4-N and PO4-P) via excretion. The studied area comprised several stations along a latitudinal gradient in the East Greenland current, plus a network of stations NW of the Svalbard islands. The specific respiratory carbon losses and phosphorus (PO4-P) excretion rates were similar or slightly higher than some reports for Arctic mesozooplankton, but the nitrogen (NH4-N) excretion rates were higher by a factor of 3 when compared with previous data sets. The mesozooplankton respiratory losses were equivalent to 23% of primary production, and at turn zooplankton contributed by excretion to more than 50% of the N and P required by phytoplankton. Although C:N, C:P and N:P metabolic atomic quotients almost coincided with the average Redfield's stoichiometric ratios, the low C:N values when compared to previous reports suggested a predominance of protein-related metabolic substrates. The potential consequences of changes observed in the C:N, N:P and C:P metabolic ratios of mesozooplankton for Arctic marine ecosystems are discussed. © 2010 Springer-Verlag. |
format |
artículo |
author |
Alcaraz, Miquel Almeda, Rodrigo Calbet, Albert Saiz, Enric Duarte, Carlos M. Lasternas, Sebastien Agustí, Susana Santiago, Reyes de Movilla, Juan Ignacio Alonso, A. |
spellingShingle |
Alcaraz, Miquel Almeda, Rodrigo Calbet, Albert Saiz, Enric Duarte, Carlos M. Lasternas, Sebastien Agustí, Susana Santiago, Reyes de Movilla, Juan Ignacio Alonso, A. The role of arctic zooplankton in biogeochemical cycles: Respiration and excretion of ammonia and phosphate during summer |
author_facet |
Alcaraz, Miquel Almeda, Rodrigo Calbet, Albert Saiz, Enric Duarte, Carlos M. Lasternas, Sebastien Agustí, Susana Santiago, Reyes de Movilla, Juan Ignacio Alonso, A. |
author_sort |
Alcaraz, Miquel |
title |
The role of arctic zooplankton in biogeochemical cycles: Respiration and excretion of ammonia and phosphate during summer |
title_short |
The role of arctic zooplankton in biogeochemical cycles: Respiration and excretion of ammonia and phosphate during summer |
title_full |
The role of arctic zooplankton in biogeochemical cycles: Respiration and excretion of ammonia and phosphate during summer |
title_fullStr |
The role of arctic zooplankton in biogeochemical cycles: Respiration and excretion of ammonia and phosphate during summer |
title_full_unstemmed |
The role of arctic zooplankton in biogeochemical cycles: Respiration and excretion of ammonia and phosphate during summer |
title_sort |
role of arctic zooplankton in biogeochemical cycles: respiration and excretion of ammonia and phosphate during summer |
publisher |
Springer |
publishDate |
2010 |
url |
http://hdl.handle.net/10261/60362 |
work_keys_str_mv |
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