Distribution of pteropods (Mollusca: Gastropoda: Thecosomata) in surface waters (0-100 m) of the Western Caribbean Sea (winter, 2007)

The main goal of this survey was to study the vertical and horizontal distribution of the thecosome pteropods in the upper 100 m of the western Caribbean Sea. Zooplankton was collected at 60 stations in January 2007 at stratified depth intervals of 25 m from the surface to 100 m. The community was a...

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Autores principales:	Parra-Flores,Ana, Gasca,Rebeca
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2009
Materias:	Thecosome molluscs marine zooplankton vertical migration abundance diversity
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000300011
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spelling	oai:scielo:S0718-195720090003000112010-03-31Distribution of pteropods (Mollusca: Gastropoda: Thecosomata) in surface waters (0-100 m) of the Western Caribbean Sea (winter, 2007)Parra-Flores,AnaGasca,Rebeca Thecosome molluscs marine zooplankton vertical migration abundance diversity The main goal of this survey was to study the vertical and horizontal distribution of the thecosome pteropods in the upper 100 m of the western Caribbean Sea. Zooplankton was collected at 60 stations in January 2007 at stratified depth intervals of 25 m from the surface to 100 m. The community was analyzed for diversity, evenness, species richness, and similarity. We recorded 36 taxa 12 of which are new records for the western Caribbean. The most abundant taxa were Limacina inflata, L. trochiformis, Creseis acicula f. clava, Cuvierina columnella atlantica, and Hyalocylis striata. In general, these taxa showed a similar pattern, their highest abundances occurred consistently in 0-25 m layer in both night and day samples; abundance decreased with depth. Significant day/night differences were found in the composition and abundance of pteropods, differences among depth intervals were non-significant. Our results showed that the upper 25 m harbored the highest species richness, diversity, and vertical abundance of pteropods, thus providing unprecedented detail with respect to previous surveys. The local community structure of the pteropods is determined largely by vertical day/night migrations. Pteropods tended to be most abundant in the southern and northern sectors of the area, but highest diversity and species richness were recorded in the central sector. Overall, the low variability of the hydrographic conditions and the mixed horizontal distribution of the clusters from the similarity analysis suggest that day/night migratory patterns of the most abundant taxa are determinant of the observed variability of the pteropod community.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.44 n.3 20092009-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000300011en10.4067/S0718-19572009000300011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Thecosome molluscs marine zooplankton vertical migration abundance diversity
spellingShingle	Thecosome molluscs marine zooplankton vertical migration abundance diversity Parra-Flores,Ana Gasca,Rebeca Distribution of pteropods (Mollusca: Gastropoda: Thecosomata) in surface waters (0-100 m) of the Western Caribbean Sea (winter, 2007)
description	The main goal of this survey was to study the vertical and horizontal distribution of the thecosome pteropods in the upper 100 m of the western Caribbean Sea. Zooplankton was collected at 60 stations in January 2007 at stratified depth intervals of 25 m from the surface to 100 m. The community was analyzed for diversity, evenness, species richness, and similarity. We recorded 36 taxa 12 of which are new records for the western Caribbean. The most abundant taxa were Limacina inflata, L. trochiformis, Creseis acicula f. clava, Cuvierina columnella atlantica, and Hyalocylis striata. In general, these taxa showed a similar pattern, their highest abundances occurred consistently in 0-25 m layer in both night and day samples; abundance decreased with depth. Significant day/night differences were found in the composition and abundance of pteropods, differences among depth intervals were non-significant. Our results showed that the upper 25 m harbored the highest species richness, diversity, and vertical abundance of pteropods, thus providing unprecedented detail with respect to previous surveys. The local community structure of the pteropods is determined largely by vertical day/night migrations. Pteropods tended to be most abundant in the southern and northern sectors of the area, but highest diversity and species richness were recorded in the central sector. Overall, the low variability of the hydrographic conditions and the mixed horizontal distribution of the clusters from the similarity analysis suggest that day/night migratory patterns of the most abundant taxa are determinant of the observed variability of the pteropod community.
author	Parra-Flores,Ana Gasca,Rebeca
author_facet	Parra-Flores,Ana Gasca,Rebeca
author_sort	Parra-Flores,Ana
title	Distribution of pteropods (Mollusca: Gastropoda: Thecosomata) in surface waters (0-100 m) of the Western Caribbean Sea (winter, 2007)
title_short	Distribution of pteropods (Mollusca: Gastropoda: Thecosomata) in surface waters (0-100 m) of the Western Caribbean Sea (winter, 2007)
title_full	Distribution of pteropods (Mollusca: Gastropoda: Thecosomata) in surface waters (0-100 m) of the Western Caribbean Sea (winter, 2007)
title_fullStr	Distribution of pteropods (Mollusca: Gastropoda: Thecosomata) in surface waters (0-100 m) of the Western Caribbean Sea (winter, 2007)
title_full_unstemmed	Distribution of pteropods (Mollusca: Gastropoda: Thecosomata) in surface waters (0-100 m) of the Western Caribbean Sea (winter, 2007)
title_sort	distribution of pteropods (mollusca: gastropoda: thecosomata) in surface waters (0-100 m) of the western caribbean sea (winter, 2007)
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000300011
work_keys_str_mv	AT parrafloresana distributionofpteropodsmolluscagastropodathecosomatainsurfacewaters0100mofthewesterncaribbeanseawinter2007 AT gascarebeca distributionofpteropodsmolluscagastropodathecosomatainsurfacewaters0100mofthewesterncaribbeanseawinter2007
_version_	1714202288690561024

Distribution of pteropods (Mollusca: Gastropoda: Thecosomata) in surface waters (0-100 m) of the Western Caribbean Sea (winter, 2007)

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