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

The distribution of six <i>Pseudo-nitzschia</i> 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, we...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Almandoz, Gastón Osvaldo, Ferreyra, Gustavo A., Schloss, Irene R., Dogliotti, Ana I., Rupolo, Volfango, Paparazzo, Flavio E., Esteves, Jose Luis, Ferrario, Martha Elba
Formato: Articulo
Lenguaje:Inglés
Publicado: 2008
Materias:
Ciencias Naturales
Antarctica
Diatoms
Phytoplankton distribution
Pseudo-nitzschia
Weddell Sea
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/136867
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-136867
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Antarctica
Diatoms
Phytoplankton distribution
Pseudo-nitzschia
Weddell Sea
spellingShingle Ciencias Naturales
Antarctica
Diatoms
Phytoplankton distribution
Pseudo-nitzschia
Weddell Sea
Almandoz, Gastón Osvaldo
Ferreyra, Gustavo A.
Schloss, Irene R.
Dogliotti, Ana I.
Rupolo, Volfango
Paparazzo, Flavio E.
Esteves, Jose Luis
Ferrario, Martha Elba
Distribution and ecology of <i>Pseudo-nitzschia</i> species (Bacillariophyceae) in surface waters of the Weddell Sea (Antarctica)
topic_facet Ciencias Naturales
Antarctica
Diatoms
Phytoplankton distribution
Pseudo-nitzschia
Weddell Sea
description The distribution of six <i>Pseudo-nitzschia</i> 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 <i>Pseudo-nitzschia</i> was broadly distributed and significantly contributed to total diatom densities. A marked contrast in <i>Pseudo-nitzschia</i> species distribution was observed in three main zones divided by the Weddell Front (WF) and the Antarctic Slope Front (ASF). <i>P. subcurvata</i> and <i>P. turgiduloides</i> 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, <i>P. prolongatoides</i> and <i>P. lineola</i> 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, <i>P. turgidula</i> and <i>P. heimii</i> 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 <i>Pseudo-nitzschia</i> species description is given in the Appendix, including morphometrics and pictures.
format Articulo
Articulo
author Almandoz, Gastón Osvaldo
Ferreyra, Gustavo A.
Schloss, Irene R.
Dogliotti, Ana I.
Rupolo, Volfango
Paparazzo, Flavio E.
Esteves, Jose Luis
Ferrario, Martha Elba
author_facet Almandoz, Gastón Osvaldo
Ferreyra, Gustavo A.
Schloss, Irene R.
Dogliotti, Ana I.
Rupolo, Volfango
Paparazzo, Flavio E.
Esteves, Jose Luis
Ferrario, Martha Elba
author_sort Almandoz, Gastón Osvaldo
title Distribution and ecology of <i>Pseudo-nitzschia</i> species (Bacillariophyceae) in surface waters of the Weddell Sea (Antarctica)
title_short Distribution and ecology of <i>Pseudo-nitzschia</i> species (Bacillariophyceae) in surface waters of the Weddell Sea (Antarctica)
title_full Distribution and ecology of <i>Pseudo-nitzschia</i> species (Bacillariophyceae) in surface waters of the Weddell Sea (Antarctica)
title_fullStr Distribution and ecology of <i>Pseudo-nitzschia</i> species (Bacillariophyceae) in surface waters of the Weddell Sea (Antarctica)
title_full_unstemmed Distribution and ecology of <i>Pseudo-nitzschia</i> species (Bacillariophyceae) in surface waters of the Weddell Sea (Antarctica)
title_sort distribution and ecology of <i>pseudo-nitzschia</i> species (bacillariophyceae) in surface waters of the weddell sea (antarctica)
publishDate 2008
url http://sedici.unlp.edu.ar/handle/10915/136867
work_keys_str_mv AT almandozgastonosvaldo distributionandecologyofipseudonitzschiaispeciesbacillariophyceaeinsurfacewatersoftheweddellseaantarctica
AT ferreyragustavoa distributionandecologyofipseudonitzschiaispeciesbacillariophyceaeinsurfacewatersoftheweddellseaantarctica
AT schlossirener distributionandecologyofipseudonitzschiaispeciesbacillariophyceaeinsurfacewatersoftheweddellseaantarctica
AT dogliottianai distributionandecologyofipseudonitzschiaispeciesbacillariophyceaeinsurfacewatersoftheweddellseaantarctica
AT rupolovolfango distributionandecologyofipseudonitzschiaispeciesbacillariophyceaeinsurfacewatersoftheweddellseaantarctica
AT paparazzoflavioe distributionandecologyofipseudonitzschiaispeciesbacillariophyceaeinsurfacewatersoftheweddellseaantarctica
AT estevesjoseluis distributionandecologyofipseudonitzschiaispeciesbacillariophyceaeinsurfacewatersoftheweddellseaantarctica
AT ferrariomarthaelba distributionandecologyofipseudonitzschiaispeciesbacillariophyceaeinsurfacewatersoftheweddellseaantarctica
bdutipo_str Repositorios
_version_ 1764820457443295232

Ejemplares similares