Primary production enhancement in a shallow seamount (Gorringe - Northeast Atlantic)
Gorringe bank is a shallow seamount having its summit within the euphotic layer. The purpose of this study was to test the hypothesis that the interaction of ocean currents with shallow water seamounts, as the Gorringe, has a significant effect on local upwelling and primary production. Three hydrog...
Published in: | Journal of Marine Systems |
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Language: | English |
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Online Access: | http://hdl.handle.net/10553/47264 https://doi.org/10.1016/j.jmarsys.2016.07.012 |
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ftunivlaspalmas:oai:accedacris.ulpgc.es:10553/47264 2023-05-15T17:41:21+02:00 Primary production enhancement in a shallow seamount (Gorringe - Northeast Atlantic) Oliveira, Ana Paula Coutinho, Teresa Pereira Cabeçadas, Graça Brogueira, Maria José Coca, Josep Ramos, Manuela Calado, Gonçalo Duarte, Pedro Duarte, Pedro Coca Saez de Albeniz, Josep Scientific output, CIIMAR Scientific Productivity, CIIMAR Coutinho, Teresa Calado, Goncalo Ramos, Manuela 14071656200 50261256600 6603372189 6602905758 7006741572 56985182100 6602397809 7005201821 616818 151259 2511456 2296268 1955355 5777603 487038 346996 2016 http://hdl.handle.net/10553/47264 https://doi.org/10.1016/j.jmarsys.2016.07.012 eng eng 0924-7963 Journal of Marine Systems 164 0924-7963 http://hdl.handle.net/10553/47264 doi:10.1016/j.jmarsys.2016.07.012 84982128226 000385329600002 F-1247-2014 H-7067-2015 E-5122-2012 N-6498-2017 No ID Sí Journal of Marine Systems [ISSN 0924-7963], v. 164, p. 13-29 2510 Oceanografía Primary production Phytoplankton composition Gorringe seamount Northeast Atlantic Upwelling info:eu-repo/semantics/article Article 2016 ftunivlaspalmas https://doi.org/10.1016/j.jmarsys.2016.07.012 2021-02-03T00:10:33Z Gorringe bank is a shallow seamount having its summit within the euphotic layer. The purpose of this study was to test the hypothesis that the interaction of ocean currents with shallow water seamounts, as the Gorringe, has a significant effect on local upwelling and primary production. Three hydrographic surveys were carried out: one in autumn (October 2011) and two in summer (June and July 2012). Physical (salinity, temperature), chemical (nutrients, dissolved oxygen, pH, total alkalinity and suspended particulate matter) and biological (chlorophyll, pelagic primary production and phytoplankton composition and abundance) variables were measured and/or determined in the area of Gorringe Bank, in particular over and around the Ormonde and Gettysburg peaks. Multivariate analyses (PCA and MDS) were applied to environmental and phytoplankton data. Statistical analysis of historical satellite and model data was also carried out in order to analyze local hydrographic conditions and to compare sea surface temperature and chlorophyll concentrations over the peaks and off the peaks in different seasons. Pelagic primary production, measured by Dissolved Oxygen methodology, reached values up to 24.10 mg C m− 3 h− 1 in the vicinity of the peaks. Phytoplankton abundance ranged from 2.2 × 103 to 14 × 103 cells L− 1, being the community composed mainly of chain-forming Diatoms like Chaetoceros sp., Dactyliosolen spp., Hemiaulus hauckii and Pseudonitzschia spp., in summer months, in zones of high hydrodynamics of the peaks. By contrast, at locations away of the seamount summits and in autumn, Coccolithophores species reached the same or higher percentage in total abundance than Diatoms, being Discosphaera tubifer and Calcidiscus leptoporus cf. the most abundant species. The combined results indicate the presence of a seasonal effect of Gorringe summits on local upwelling and enhancement of primary production reflected in higher abundance of phytoplankton in the vicinity of the peaks, with emphasis on the Gettysburg, and higher surface chlorophyll concentrations. Therefore, obtained results support the hypothesis of production enhancement. 29 13 Article in Journal/Newspaper Northeast Atlantic Universidad de Las Palmas de Gran Canaria: Acceda Journal of Marine Systems 164 13 29 |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
2510 Oceanografía Primary production Phytoplankton composition Gorringe seamount Northeast Atlantic Upwelling |
spellingShingle |
2510 Oceanografía Primary production Phytoplankton composition Gorringe seamount Northeast Atlantic Upwelling Oliveira, Ana Paula Coutinho, Teresa Pereira Cabeçadas, Graça Brogueira, Maria José Coca, Josep Ramos, Manuela Calado, Gonçalo Duarte, Pedro Primary production enhancement in a shallow seamount (Gorringe - Northeast Atlantic) |
topic_facet |
2510 Oceanografía Primary production Phytoplankton composition Gorringe seamount Northeast Atlantic Upwelling |
description |
Gorringe bank is a shallow seamount having its summit within the euphotic layer. The purpose of this study was to test the hypothesis that the interaction of ocean currents with shallow water seamounts, as the Gorringe, has a significant effect on local upwelling and primary production. Three hydrographic surveys were carried out: one in autumn (October 2011) and two in summer (June and July 2012). Physical (salinity, temperature), chemical (nutrients, dissolved oxygen, pH, total alkalinity and suspended particulate matter) and biological (chlorophyll, pelagic primary production and phytoplankton composition and abundance) variables were measured and/or determined in the area of Gorringe Bank, in particular over and around the Ormonde and Gettysburg peaks. Multivariate analyses (PCA and MDS) were applied to environmental and phytoplankton data. Statistical analysis of historical satellite and model data was also carried out in order to analyze local hydrographic conditions and to compare sea surface temperature and chlorophyll concentrations over the peaks and off the peaks in different seasons. Pelagic primary production, measured by Dissolved Oxygen methodology, reached values up to 24.10 mg C m− 3 h− 1 in the vicinity of the peaks. Phytoplankton abundance ranged from 2.2 × 103 to 14 × 103 cells L− 1, being the community composed mainly of chain-forming Diatoms like Chaetoceros sp., Dactyliosolen spp., Hemiaulus hauckii and Pseudonitzschia spp., in summer months, in zones of high hydrodynamics of the peaks. By contrast, at locations away of the seamount summits and in autumn, Coccolithophores species reached the same or higher percentage in total abundance than Diatoms, being Discosphaera tubifer and Calcidiscus leptoporus cf. the most abundant species. The combined results indicate the presence of a seasonal effect of Gorringe summits on local upwelling and enhancement of primary production reflected in higher abundance of phytoplankton in the vicinity of the peaks, with emphasis on the Gettysburg, and higher surface chlorophyll concentrations. Therefore, obtained results support the hypothesis of production enhancement. 29 13 |
author2 |
Duarte, Pedro Coca Saez de Albeniz, Josep Scientific output, CIIMAR Scientific Productivity, CIIMAR Coutinho, Teresa Calado, Goncalo Ramos, Manuela 14071656200 50261256600 6603372189 6602905758 7006741572 56985182100 6602397809 7005201821 616818 151259 2511456 2296268 1955355 5777603 487038 346996 |
format |
Article in Journal/Newspaper |
author |
Oliveira, Ana Paula Coutinho, Teresa Pereira Cabeçadas, Graça Brogueira, Maria José Coca, Josep Ramos, Manuela Calado, Gonçalo Duarte, Pedro |
author_facet |
Oliveira, Ana Paula Coutinho, Teresa Pereira Cabeçadas, Graça Brogueira, Maria José Coca, Josep Ramos, Manuela Calado, Gonçalo Duarte, Pedro |
author_sort |
Oliveira, Ana Paula |
title |
Primary production enhancement in a shallow seamount (Gorringe - Northeast Atlantic) |
title_short |
Primary production enhancement in a shallow seamount (Gorringe - Northeast Atlantic) |
title_full |
Primary production enhancement in a shallow seamount (Gorringe - Northeast Atlantic) |
title_fullStr |
Primary production enhancement in a shallow seamount (Gorringe - Northeast Atlantic) |
title_full_unstemmed |
Primary production enhancement in a shallow seamount (Gorringe - Northeast Atlantic) |
title_sort |
primary production enhancement in a shallow seamount (gorringe - northeast atlantic) |
publisher |
0924-7963 |
publishDate |
2016 |
url |
http://hdl.handle.net/10553/47264 https://doi.org/10.1016/j.jmarsys.2016.07.012 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Journal of Marine Systems [ISSN 0924-7963], v. 164, p. 13-29 |
op_relation |
Journal of Marine Systems 164 0924-7963 http://hdl.handle.net/10553/47264 doi:10.1016/j.jmarsys.2016.07.012 84982128226 000385329600002 F-1247-2014 H-7067-2015 E-5122-2012 N-6498-2017 No ID Sí |
op_doi |
https://doi.org/10.1016/j.jmarsys.2016.07.012 |
container_title |
Journal of Marine Systems |
container_volume |
164 |
container_start_page |
13 |
op_container_end_page |
29 |
_version_ |
1766142850587688960 |