Coccolithophore species as indicators of surface oceanographic conditions in the vicinity of Azores islands
| Autor(a) principal: | |
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| Data de Publicação: | 2013 |
| Outros Autores: | , , , , , , |
| Tipo de documento: | Artigo |
| Idioma: | eng |
| Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
| Texto Completo: | http://hdl.handle.net/10400.3/2102 |
Resumo: | Copyright © 2013 Elsevier Ltd. All rights reserved. |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Coccolithophore species as indicators of surface oceanographic conditions in the vicinity of Azores islandsCoccolithophoresPhytoplanktonHPLC PigmentsAzores ArchipelagoAtlantic OceanCopyright © 2013 Elsevier Ltd. All rights reserved.During summer 2008 and spring 2009, surface oceanographic surveys were carried out around three islands of the Azores archipelago (Terceira, São Miguel and Santa Maria) to assess the phytoplankton distribution and associated physico-chemical processes. The Azores archipelago is a major feature in the biogeochemical North Atlantic Subtropical Gyre (NAST) province although its influence on the productivity of the surrounding ocean is poorly known. Surface phytoplankton was studied by microscopy and HPLC (High Precision Liquid Chromatography). The mean values for biomass proxy Chlorophyll a (Chla) ranged from 0.04 to 0.55 μg Lˉ¹ (Chla maximum = 0.86 μg Lˉ¹) and coccolithophores were the most abundant group, followed by small flagellates, Cyanobacteria, diatoms and dinoflagellates being the least abundant group. The distribution of phytoplankton and coccolithophore species in particular presented seasonal differences and was consistent with the nearshore influence of warm subtropical waters from the south Azores current and colder subpolar waters from the north. The satellite-derived circulation patterns showed southward cold water intrusions off Terceira and northward warm water intrusions off Santa Maria. The warmer waters signal was confirmed by the subtropical coccolithophore assemblage, being Discosphaera tubifera a constant presence under these conditions. The regions of enhanced biomass, either resulting from northern cooler waters or from island induced processe, were characterized by the presence of Emiliania huxleyi. Diatoms and dinoflagellates indicated coastal and regional processe of nutrient enrichment and areas of physical stability, respectively.ElsevierRepositório da Universidade dos AçoresSilva, Alexandra A.Brotas, VandaValente, A.Sá, C.Diniz, TaniaPatarra, Rita F.Álvaro, Nuno V.Neto, Ana I.2013-06-27T11:57:16Z2013-012013-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfapplication/pdfhttp://hdl.handle.net/10400.3/2102engSilva A, Brotas V, Valente A, Diniz T, Sá C, Patarra RF, Álvaro NV & & Neto AI (2013). "Coccolithophore species as indicators of surface oceanographic conditions in the vicinity of Azores islands". «Estuarine, Costal and Shelf Science», 118: 50-59, DOI: 10.1016/j.ecss.2012.12.010.0272-7714 (Print)info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-12-20T14:29:49ZPortal AgregadorONG |
| dc.title.none.fl_str_mv |
Coccolithophore species as indicators of surface oceanographic conditions in the vicinity of Azores islands |
| title |
Coccolithophore species as indicators of surface oceanographic conditions in the vicinity of Azores islands |
| spellingShingle |
Coccolithophore species as indicators of surface oceanographic conditions in the vicinity of Azores islands Silva, Alexandra A. Coccolithophores Phytoplankton HPLC Pigments Azores Archipelago Atlantic Ocean |
| title_short |
Coccolithophore species as indicators of surface oceanographic conditions in the vicinity of Azores islands |
| title_full |
Coccolithophore species as indicators of surface oceanographic conditions in the vicinity of Azores islands |
| title_fullStr |
Coccolithophore species as indicators of surface oceanographic conditions in the vicinity of Azores islands |
| title_full_unstemmed |
Coccolithophore species as indicators of surface oceanographic conditions in the vicinity of Azores islands |
| title_sort |
Coccolithophore species as indicators of surface oceanographic conditions in the vicinity of Azores islands |
| author |
Silva, Alexandra A. |
| author_facet |
Silva, Alexandra A. Brotas, Vanda Valente, A. Sá, C. Diniz, Tania Patarra, Rita F. Álvaro, Nuno V. Neto, Ana I. |
| author_role |
author |
| author2 |
Brotas, Vanda Valente, A. Sá, C. Diniz, Tania Patarra, Rita F. Álvaro, Nuno V. Neto, Ana I. |
| author2_role |
author author author author author author author |
| dc.contributor.none.fl_str_mv |
Repositório da Universidade dos Açores |
| dc.contributor.author.fl_str_mv |
Silva, Alexandra A. Brotas, Vanda Valente, A. Sá, C. Diniz, Tania Patarra, Rita F. Álvaro, Nuno V. Neto, Ana I. |
| dc.subject.por.fl_str_mv |
Coccolithophores Phytoplankton HPLC Pigments Azores Archipelago Atlantic Ocean |
| topic |
Coccolithophores Phytoplankton HPLC Pigments Azores Archipelago Atlantic Ocean |
| description |
Copyright © 2013 Elsevier Ltd. All rights reserved. |
| publishDate |
2013 |
| dc.date.none.fl_str_mv |
2013-06-27T11:57:16Z 2013-01 2013-01-01T00:00:00Z |
| dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/article |
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article |
| status_str |
publishedVersion |
| dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.3/2102 |
| url |
http://hdl.handle.net/10400.3/2102 |
| dc.language.iso.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
Silva A, Brotas V, Valente A, Diniz T, Sá C, Patarra RF, Álvaro NV & & Neto AI (2013). "Coccolithophore species as indicators of surface oceanographic conditions in the vicinity of Azores islands". «Estuarine, Costal and Shelf Science», 118: 50-59, DOI: 10.1016/j.ecss.2012.12.010. 0272-7714 (Print) |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf application/pdf |
| dc.publisher.none.fl_str_mv |
Elsevier |
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Elsevier |
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reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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1777301694971904000 |