Metazooplankton distribution across the Southern Indian Ocean with emphasis on the role of Larvaceans
The abundance and depth distribution of metazoans > 20 mu m were investigated at seven stations across the Southern Indian Ocean (SIO), October-November 2006. Copepod nauplii, copepodites and larvaceans dominated the metazooplankton community. Copepodites were most abundant within Agulhas Current...
Published in: | Journal of Plankton Research |
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2009
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Online Access: | https://orbit.dtu.dk/en/publications/9f044e6e-3a73-41ac-bb3c-0ed80f18b88e https://doi.org/10.1093/plankt/fbp002 |
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ftdtupubl:oai:pure.atira.dk:publications/9f044e6e-3a73-41ac-bb3c-0ed80f18b88e 2024-09-15T18:37:15+00:00 Metazooplankton distribution across the Southern Indian Ocean with emphasis on the role of Larvaceans Jaspers, Cornelia Nielsen, Torkel Gissel Carstensen, Jacob Hopcroft, Russell R. Møller, Eva Friis 2009 https://orbit.dtu.dk/en/publications/9f044e6e-3a73-41ac-bb3c-0ed80f18b88e https://doi.org/10.1093/plankt/fbp002 eng eng https://orbit.dtu.dk/en/publications/9f044e6e-3a73-41ac-bb3c-0ed80f18b88e info:eu-repo/semantics/closedAccess Jaspers , C , Nielsen , T G , Carstensen , J , Hopcroft , R R & Møller , E F 2009 , ' Metazooplankton distribution across the Southern Indian Ocean with emphasis on the role of Larvaceans ' , Journal of Plankton Research , vol. 31 , no. 5 , pp. 525-540 . https://doi.org/10.1093/plankt/fbp002 article 2009 ftdtupubl https://doi.org/10.1093/plankt/fbp002 2024-07-29T23:50:17Z The abundance and depth distribution of metazoans > 20 mu m were investigated at seven stations across the Southern Indian Ocean (SIO), October-November 2006. Copepod nauplii, copepodites and larvaceans dominated the metazooplankton community. Copepodites were most abundant within Agulhas Current and Southern Ocean waters, decreasing toward subtropical/tropical areas, whereas larvaceans showed the inverse pattern. The fraction <200 mu m contained the majority of the zooplankton enumerated, including 81, 23 and 93% of the larvacean, copepodite and nauplii abundances, respectively. The relative abundance of larvaceans compared with copepodites increased from 7 to 44% from South Africa towards Australia. Peak copepodite biomass was observed off South Africa, while larvacean biomass was <1% of the copepodite biomass there, increasing to 6% in tropical waters. Both copepodite and nauplii biomass were positively correlated to total Chl a (P <0.0001), larvacean biomass was only significantly related to temperature (P = 0.0213). Despite their low biomass, larvacean production was estimated to exceed the copepod production up to five times. It appears that the abundance and role of larvaceans in the SIO has been severely underestimated in previous studies; thus future investigations into the fate of organic matter will remain incomplete if this group is not adequately considered. Article in Journal/Newspaper Southern Ocean Technical University of Denmark: DTU Orbit Journal of Plankton Research 31 5 525 540 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
description |
The abundance and depth distribution of metazoans > 20 mu m were investigated at seven stations across the Southern Indian Ocean (SIO), October-November 2006. Copepod nauplii, copepodites and larvaceans dominated the metazooplankton community. Copepodites were most abundant within Agulhas Current and Southern Ocean waters, decreasing toward subtropical/tropical areas, whereas larvaceans showed the inverse pattern. The fraction <200 mu m contained the majority of the zooplankton enumerated, including 81, 23 and 93% of the larvacean, copepodite and nauplii abundances, respectively. The relative abundance of larvaceans compared with copepodites increased from 7 to 44% from South Africa towards Australia. Peak copepodite biomass was observed off South Africa, while larvacean biomass was <1% of the copepodite biomass there, increasing to 6% in tropical waters. Both copepodite and nauplii biomass were positively correlated to total Chl a (P <0.0001), larvacean biomass was only significantly related to temperature (P = 0.0213). Despite their low biomass, larvacean production was estimated to exceed the copepod production up to five times. It appears that the abundance and role of larvaceans in the SIO has been severely underestimated in previous studies; thus future investigations into the fate of organic matter will remain incomplete if this group is not adequately considered. |
format |
Article in Journal/Newspaper |
author |
Jaspers, Cornelia Nielsen, Torkel Gissel Carstensen, Jacob Hopcroft, Russell R. Møller, Eva Friis |
spellingShingle |
Jaspers, Cornelia Nielsen, Torkel Gissel Carstensen, Jacob Hopcroft, Russell R. Møller, Eva Friis Metazooplankton distribution across the Southern Indian Ocean with emphasis on the role of Larvaceans |
author_facet |
Jaspers, Cornelia Nielsen, Torkel Gissel Carstensen, Jacob Hopcroft, Russell R. Møller, Eva Friis |
author_sort |
Jaspers, Cornelia |
title |
Metazooplankton distribution across the Southern Indian Ocean with emphasis on the role of Larvaceans |
title_short |
Metazooplankton distribution across the Southern Indian Ocean with emphasis on the role of Larvaceans |
title_full |
Metazooplankton distribution across the Southern Indian Ocean with emphasis on the role of Larvaceans |
title_fullStr |
Metazooplankton distribution across the Southern Indian Ocean with emphasis on the role of Larvaceans |
title_full_unstemmed |
Metazooplankton distribution across the Southern Indian Ocean with emphasis on the role of Larvaceans |
title_sort |
metazooplankton distribution across the southern indian ocean with emphasis on the role of larvaceans |
publishDate |
2009 |
url |
https://orbit.dtu.dk/en/publications/9f044e6e-3a73-41ac-bb3c-0ed80f18b88e https://doi.org/10.1093/plankt/fbp002 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Jaspers , C , Nielsen , T G , Carstensen , J , Hopcroft , R R & Møller , E F 2009 , ' Metazooplankton distribution across the Southern Indian Ocean with emphasis on the role of Larvaceans ' , Journal of Plankton Research , vol. 31 , no. 5 , pp. 525-540 . https://doi.org/10.1093/plankt/fbp002 |
op_relation |
https://orbit.dtu.dk/en/publications/9f044e6e-3a73-41ac-bb3c-0ed80f18b88e |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1093/plankt/fbp002 |
container_title |
Journal of Plankton Research |
container_volume |
31 |
container_issue |
5 |
container_start_page |
525 |
op_container_end_page |
540 |
_version_ |
1810481610470981632 |