Distribution and ecology of Pseudo-nitzschia species (Bacillariophyceae) in surface waters of the Weddell Sea (Antarctica)

The distribution of six Pseudo-nitzschia species and their relationship with environmental conditions were studied for the first time in a vast zone of the Weddell Sea (∼61-77°S, Antarctica). Both qualitative and quantitative phytoplankton samples, collected during summer 2004, were examined using l...

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Autores principales: Almandoz, G.O., Ferreyra, G.A., Schloss, I.R., Dogliotti, A.I., Rupolo, V., Paparazzo, F.E., Esteves, J.L., Ferrario, M.E.
Formato: JOUR
Materias:
Antarctica
Diatoms
Phytoplankton distribution
Pseudo-nitzschia
Weddell Sea
abundance
community composition
confluence
diatom
ecology
environmental conditions
flagellate
ice cover
morphology
morphometry
phytoplankton
spatial distribution
species-area relationship
surface water
Atlantic Ocean
Scotia Sea
Southern Ocean
Bacillariophyceae
Bacillariophyta
Mastigophora (flagellates)
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_07224060_v31_n4_p429_Almandoz
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_07224060_v31_n4_p429_Almandoz
record_format dspace
spelling todo:paper_07224060_v31_n4_p429_Almandoz2023-10-03T15:37:03Z Distribution and ecology of Pseudo-nitzschia species (Bacillariophyceae) in surface waters of the Weddell Sea (Antarctica) Almandoz, G.O. Ferreyra, G.A. Schloss, I.R. Dogliotti, A.I. Rupolo, V. Paparazzo, F.E. Esteves, J.L. Ferrario, M.E. Antarctica Diatoms Phytoplankton distribution Pseudo-nitzschia Weddell Sea abundance community composition confluence diatom ecology environmental conditions flagellate ice cover morphology morphometry phytoplankton spatial distribution species-area relationship surface water Antarctica Atlantic Ocean Scotia Sea Southern Ocean Weddell Sea Bacillariophyceae Bacillariophyta Mastigophora (flagellates) Pseudo-nitzschia The distribution of six Pseudo-nitzschia species and their relationship with environmental conditions were studied for the first time in a vast zone of the Weddell Sea (∼61-77°S, Antarctica). Both qualitative and quantitative phytoplankton samples, collected during summer 2004, were examined using light and scanning electron microscopy. Phytoplankton abundance and composition showed great variability along our study area. Diatoms were the most conspicuous phytoplankton group in the northern area while small flagellates were generally dominant in the southern stations. The genus Pseudo-nitzschia was broadly distributed and significantly contributed to total diatom densities. A marked contrast in Pseudo-nitzschia species distribution was observed in three main zones divided by the Weddell Front (WF) and the Antarctic Slope Front (ASF). P. subcurvata and P. turgiduloides were the most abundant species in the neritic Weddell Sea zone, south of the ASF, mainly near the ice-edge in shallower waters and in conditions of long photoperiod. In contrast, P. prolongatoides and P. lineola dominated north of the ASF; the first was associated with deeper and nutrient-rich waters whereas the latter showed a weak relation with environmental variables examined. Finally, P. turgidula and P. heimii were mostly observed in the Weddell-Scotia Confluence Zone in the warmest and far from ice covered waters, north of the WF. A brief morphological Pseudo-nitzschia species description is given in the Appendix, including morphometrics and pictures. © 2007 Springer-Verlag. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_07224060_v31_n4_p429_Almandoz
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Antarctica
Diatoms
Phytoplankton distribution
Pseudo-nitzschia
Weddell Sea
abundance
community composition
confluence
diatom
ecology
environmental conditions
flagellate
ice cover
morphology
morphometry
phytoplankton
spatial distribution
species-area relationship
surface water
Antarctica
Atlantic Ocean
Scotia Sea
Southern Ocean
Weddell Sea
Bacillariophyceae
Bacillariophyta
Mastigophora (flagellates)
Pseudo-nitzschia
spellingShingle Antarctica
Diatoms
Phytoplankton distribution
Pseudo-nitzschia
Weddell Sea
abundance
community composition
confluence
diatom
ecology
environmental conditions
flagellate
ice cover
morphology
morphometry
phytoplankton
spatial distribution
species-area relationship
surface water
Antarctica
Atlantic Ocean
Scotia Sea
Southern Ocean
Weddell Sea
Bacillariophyceae
Bacillariophyta
Mastigophora (flagellates)
Pseudo-nitzschia
Almandoz, G.O.
Ferreyra, G.A.
Schloss, I.R.
Dogliotti, A.I.
Rupolo, V.
Paparazzo, F.E.
Esteves, J.L.
Ferrario, M.E.
Distribution and ecology of Pseudo-nitzschia species (Bacillariophyceae) in surface waters of the Weddell Sea (Antarctica)
topic_facet Antarctica
Diatoms
Phytoplankton distribution
Pseudo-nitzschia
Weddell Sea
abundance
community composition
confluence
diatom
ecology
environmental conditions
flagellate
ice cover
morphology
morphometry
phytoplankton
spatial distribution
species-area relationship
surface water
Antarctica
Atlantic Ocean
Scotia Sea
Southern Ocean
Weddell Sea
Bacillariophyceae
Bacillariophyta
Mastigophora (flagellates)
Pseudo-nitzschia
description The distribution of six Pseudo-nitzschia species and their relationship with environmental conditions were studied for the first time in a vast zone of the Weddell Sea (∼61-77°S, Antarctica). Both qualitative and quantitative phytoplankton samples, collected during summer 2004, were examined using light and scanning electron microscopy. Phytoplankton abundance and composition showed great variability along our study area. Diatoms were the most conspicuous phytoplankton group in the northern area while small flagellates were generally dominant in the southern stations. The genus Pseudo-nitzschia was broadly distributed and significantly contributed to total diatom densities. A marked contrast in Pseudo-nitzschia species distribution was observed in three main zones divided by the Weddell Front (WF) and the Antarctic Slope Front (ASF). P. subcurvata and P. turgiduloides were the most abundant species in the neritic Weddell Sea zone, south of the ASF, mainly near the ice-edge in shallower waters and in conditions of long photoperiod. In contrast, P. prolongatoides and P. lineola dominated north of the ASF; the first was associated with deeper and nutrient-rich waters whereas the latter showed a weak relation with environmental variables examined. Finally, P. turgidula and P. heimii were mostly observed in the Weddell-Scotia Confluence Zone in the warmest and far from ice covered waters, north of the WF. A brief morphological Pseudo-nitzschia species description is given in the Appendix, including morphometrics and pictures. © 2007 Springer-Verlag.
format JOUR
author Almandoz, G.O.
Ferreyra, G.A.
Schloss, I.R.
Dogliotti, A.I.
Rupolo, V.
Paparazzo, F.E.
Esteves, J.L.
Ferrario, M.E.
author_facet Almandoz, G.O.
Ferreyra, G.A.
Schloss, I.R.
Dogliotti, A.I.
Rupolo, V.
Paparazzo, F.E.
Esteves, J.L.
Ferrario, M.E.
author_sort Almandoz, G.O.
title Distribution and ecology of Pseudo-nitzschia species (Bacillariophyceae) in surface waters of the Weddell Sea (Antarctica)
title_short Distribution and ecology of Pseudo-nitzschia species (Bacillariophyceae) in surface waters of the Weddell Sea (Antarctica)
title_full Distribution and ecology of Pseudo-nitzschia species (Bacillariophyceae) in surface waters of the Weddell Sea (Antarctica)
title_fullStr Distribution and ecology of Pseudo-nitzschia species (Bacillariophyceae) in surface waters of the Weddell Sea (Antarctica)
title_full_unstemmed Distribution and ecology of Pseudo-nitzschia species (Bacillariophyceae) in surface waters of the Weddell Sea (Antarctica)
title_sort distribution and ecology of pseudo-nitzschia species (bacillariophyceae) in surface waters of the weddell sea (antarctica)
url http://hdl.handle.net/20.500.12110/paper_07224060_v31_n4_p429_Almandoz
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