Phytoplankton community structure in contrasting ecosystems of the Southern Ocean: South Georgia, South Orkneys and Western Antarctic Peninsula

The relationships between taxonomy and distribution of the phytoplankton and environmental parameters were studied in four contrasting zones (North of the South Orkney Islands= NSO, Southeast of the South Orkney Islands = SSO, Northwest of South Georgia = NSG and West of Anvers = WA) of the Atlantic...

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Autores: Nunes, S., Latasa, Mikel, Delgado, Maximino, Emelianov, Mikhail, Simó, Rafel, Estrada, Marta
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/319734
Acceso en línea:https://digital.csic.es/bitstream/10261/192549/3/Nunes_et_al_2019_preprint.pdf
http://hdl.handle.net/10261/319734
Access Level:acceso abierto
Palabra clave:Southern ocean
Medio Marino y Protección Ambiental
Centro Oceanográfico de Gijón
Phytoplankton distribution
Microscopy
HPLC
CHEMTAX
Pigments
Dimethylated sulfur
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spelling Phytoplankton community structure in contrasting ecosystems of the Southern Ocean: South Georgia, South Orkneys and Western Antarctic PeninsulaNunes, S.Latasa, MikelDelgado, MaximinoEmelianov, MikhailSimó, RafelEstrada, MartaSouthern oceanMedio Marino y Protección AmbientalCentro Oceanográfico de GijónPhytoplankton distributionMicroscopyHPLCCHEMTAXPigmentsDimethylated sulfurThe relationships between taxonomy and distribution of the phytoplankton and environmental parameters were studied in four contrasting zones (North of the South Orkney Islands= NSO, Southeast of the South Orkney Islands = SSO, Northwest of South Georgia = NSG and West of Anvers = WA) of the Atlantic sector of the Southern Ocean, during the PEGASO cruise of the BIO Hespérides (January–February 2015). The structure of the phytoplankton community was determined by microscopic examination and by pigment analyses using highperformance liquid chromatography (HPLC) followed by application of the CHEMTAX algorithm. Overall, a statistically significant association was found between fluorometric and HPLC determinations of chlorophyll a, and between chemotaxonomic and microscopy-derived estimates of the contribution of diatoms, dinoflagellates and cryptophytes, although cryptophytes appeared to be underestimated by the microscopic observations. The highest average levels of fluorometric chlorophyll a (517 mg m−2 ) were found at NSG, followed by WA (132 mg m−2 ), NSO (120 mg m−2 ) and SSO (34 mg m−2 ). The phytoplankton community at NSG was dominated by diatoms like Eucampia antarctica and Thalassiosira spp. Cryptophytes and diatoms (mainly Corethron pennatum, small Thalassiosira spp. and Fragilariopsis spp.) were the most abundant chemotaxonomic groups at NSO, followed by haptophytes types 6 + 7, Phaeocystis-like (haptophytes type 8) and, especially in the deeper levels of the euphotic zone, pelagophytes. At SSO, the most important groups were haptophytes types 6 + 7, followed by diatoms (with a combination of taxa similar to that of NSO), Phaeocystis-like and pelagophytes. The main CHEMTAX groups at WA were cryptophytes (between surface and about 40 m depth), haptophytes types 6 + 7 and diatoms. The ratio between the photoprotective pigment diadinoxanthin and the sum of the light harvesting pigments of diadinoxanthin-containing phytoplankton (sum of 19′-butanoyloxyfucoxanthin, 19′-hexanoyloxyfucoxanthin, fucoxanthin and peridinin) was highest at SSO, indicating exposure to a high irradiance environment, and presented a significant positive correlation with the euphotic zone depth. The ratios of the algal osmolyte dimethylsulfoniopropionate and the trace gas dimethylsulfide to chlorophyll a showed the same pattern across zones, highlighting the role of light-related ecophysiology in combination with taxonomy in regulating the production of dimethylated sulfur by plankton communities.SíElsevier BVConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501https://digital.csic.es/bitstream/10261/192549/3/Nunes_et_al_2019_preprint.pdfhttp://hdl.handle.net/10261/319734reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de GijónSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3197342026-05-22T06:33:51Z
dc.title.none.fl_str_mv Phytoplankton community structure in contrasting ecosystems of the Southern Ocean: South Georgia, South Orkneys and Western Antarctic Peninsula
title Phytoplankton community structure in contrasting ecosystems of the Southern Ocean: South Georgia, South Orkneys and Western Antarctic Peninsula
spellingShingle Phytoplankton community structure in contrasting ecosystems of the Southern Ocean: South Georgia, South Orkneys and Western Antarctic Peninsula
Nunes, S.
Southern ocean
Medio Marino y Protección Ambiental
Centro Oceanográfico de Gijón
Phytoplankton distribution
Microscopy
HPLC
CHEMTAX
Pigments
Dimethylated sulfur
title_short Phytoplankton community structure in contrasting ecosystems of the Southern Ocean: South Georgia, South Orkneys and Western Antarctic Peninsula
title_full Phytoplankton community structure in contrasting ecosystems of the Southern Ocean: South Georgia, South Orkneys and Western Antarctic Peninsula
title_fullStr Phytoplankton community structure in contrasting ecosystems of the Southern Ocean: South Georgia, South Orkneys and Western Antarctic Peninsula
title_full_unstemmed Phytoplankton community structure in contrasting ecosystems of the Southern Ocean: South Georgia, South Orkneys and Western Antarctic Peninsula
title_sort Phytoplankton community structure in contrasting ecosystems of the Southern Ocean: South Georgia, South Orkneys and Western Antarctic Peninsula
dc.creator.none.fl_str_mv Nunes, S.
Latasa, Mikel
Delgado, Maximino
Emelianov, Mikhail
Simó, Rafel
Estrada, Marta
author Nunes, S.
author_facet Nunes, S.
Latasa, Mikel
Delgado, Maximino
Emelianov, Mikhail
Simó, Rafel
Estrada, Marta
author_role author
author2 Latasa, Mikel
Delgado, Maximino
Emelianov, Mikhail
Simó, Rafel
Estrada, Marta
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Southern ocean
Medio Marino y Protección Ambiental
Centro Oceanográfico de Gijón
Phytoplankton distribution
Microscopy
HPLC
CHEMTAX
Pigments
Dimethylated sulfur
topic Southern ocean
Medio Marino y Protección Ambiental
Centro Oceanográfico de Gijón
Phytoplankton distribution
Microscopy
HPLC
CHEMTAX
Pigments
Dimethylated sulfur
description The relationships between taxonomy and distribution of the phytoplankton and environmental parameters were studied in four contrasting zones (North of the South Orkney Islands= NSO, Southeast of the South Orkney Islands = SSO, Northwest of South Georgia = NSG and West of Anvers = WA) of the Atlantic sector of the Southern Ocean, during the PEGASO cruise of the BIO Hespérides (January–February 2015). The structure of the phytoplankton community was determined by microscopic examination and by pigment analyses using highperformance liquid chromatography (HPLC) followed by application of the CHEMTAX algorithm. Overall, a statistically significant association was found between fluorometric and HPLC determinations of chlorophyll a, and between chemotaxonomic and microscopy-derived estimates of the contribution of diatoms, dinoflagellates and cryptophytes, although cryptophytes appeared to be underestimated by the microscopic observations. The highest average levels of fluorometric chlorophyll a (517 mg m−2 ) were found at NSG, followed by WA (132 mg m−2 ), NSO (120 mg m−2 ) and SSO (34 mg m−2 ). The phytoplankton community at NSG was dominated by diatoms like Eucampia antarctica and Thalassiosira spp. Cryptophytes and diatoms (mainly Corethron pennatum, small Thalassiosira spp. and Fragilariopsis spp.) were the most abundant chemotaxonomic groups at NSO, followed by haptophytes types 6 + 7, Phaeocystis-like (haptophytes type 8) and, especially in the deeper levels of the euphotic zone, pelagophytes. At SSO, the most important groups were haptophytes types 6 + 7, followed by diatoms (with a combination of taxa similar to that of NSO), Phaeocystis-like and pelagophytes. The main CHEMTAX groups at WA were cryptophytes (between surface and about 40 m depth), haptophytes types 6 + 7 and diatoms. The ratio between the photoprotective pigment diadinoxanthin and the sum of the light harvesting pigments of diadinoxanthin-containing phytoplankton (sum of 19′-butanoyloxyfucoxanthin, 19′-hexanoyloxyfucoxanthin, fucoxanthin and peridinin) was highest at SSO, indicating exposure to a high irradiance environment, and presented a significant positive correlation with the euphotic zone depth. The ratios of the algal osmolyte dimethylsulfoniopropionate and the trace gas dimethylsulfide to chlorophyll a showed the same pattern across zones, highlighting the role of light-related ecophysiology in combination with taxonomy in regulating the production of dimethylated sulfur by plankton communities.
publishDate 2019
dc.date.none.fl_str_mv 2019
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv https://digital.csic.es/bitstream/10261/192549/3/Nunes_et_al_2019_preprint.pdf
http://hdl.handle.net/10261/319734
url https://digital.csic.es/bitstream/10261/192549/3/Nunes_et_al_2019_preprint.pdf
http://hdl.handle.net/10261/319734
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de Gijón
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier BV
publisher.none.fl_str_mv Elsevier BV
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.81155

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