Mesoscale distribution of Oikopleura and Fritillaria (Appendicularia) in the Southern Gulf of Mexico: spatial segregation

The mesoscale spatial distribution of Oikopleura and Fritillaria in the southern Gulf of Mexico was analyzed to know the existence of segregation between them. Samples were taken on 97 stations in the 50 m upper layer. Temperature, salinity and turbidity were measured. The spatial segregation index...

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Autores principales:	Flores-Coto,César, Sanvicente-Añorve,Laura, Vázquez-Gutiérrez,Felipe, Sánchez-Ramírez,Marina
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2010
Materias:	Appendicularians mesoscale distribution spatial segregation turbidity
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572010000300002
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spelling	oai:scielo:S0718-195720100003000022011-02-03Mesoscale distribution of Oikopleura and Fritillaria (Appendicularia) in the Southern Gulf of Mexico: spatial segregationFlores-Coto,CésarSanvicente-Añorve,LauraVázquez-Gutiérrez,FelipeSánchez-Ramírez,Marina Appendicularians mesoscale distribution spatial segregation turbidity The mesoscale spatial distribution of Oikopleura and Fritillaria in the southern Gulf of Mexico was analyzed to know the existence of segregation between them. Samples were taken on 97 stations in the 50 m upper layer. Temperature, salinity and turbidity were measured. The spatial segregation index 'D' was applied to Oikopleura and Fritillaria densities and its significance was tested with Monte Carlo method. Regression Tree (RT) analyses were performed to identify the main environmental factors affecting the distribution of genera. The D index value was 0.67, considered as a high value. RT analyses showed the water turbidity was the main factor affecting the spatial distribution of both genera. Fritillaria was found in turbid waters off the main fluvio-lagoon systems and Oikopleura was most abundant in the up welling waters over Yucatan Shelf. The segregation distribution of appendicularians in the study area appear to be strongly influenced by up welling and associated currents, and turbidity generated by continental water discharges. It could be assumed that food webs are an important associated factor. We hypothesize that a broad diet and higher filtration efficiency for larger particles (microfitoplankton) allows Oikopleura species to exploit the production in up welling areas, whereas Fritillaria species can not. It may explain its spatial segregation of these genera.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.45 n.3 20102010-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572010000300002en10.4067/S0718-19572010000300002
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Appendicularians mesoscale distribution spatial segregation turbidity
spellingShingle	Appendicularians mesoscale distribution spatial segregation turbidity Flores-Coto,César Sanvicente-Añorve,Laura Vázquez-Gutiérrez,Felipe Sánchez-Ramírez,Marina Mesoscale distribution of Oikopleura and Fritillaria (Appendicularia) in the Southern Gulf of Mexico: spatial segregation
description	The mesoscale spatial distribution of Oikopleura and Fritillaria in the southern Gulf of Mexico was analyzed to know the existence of segregation between them. Samples were taken on 97 stations in the 50 m upper layer. Temperature, salinity and turbidity were measured. The spatial segregation index 'D' was applied to Oikopleura and Fritillaria densities and its significance was tested with Monte Carlo method. Regression Tree (RT) analyses were performed to identify the main environmental factors affecting the distribution of genera. The D index value was 0.67, considered as a high value. RT analyses showed the water turbidity was the main factor affecting the spatial distribution of both genera. Fritillaria was found in turbid waters off the main fluvio-lagoon systems and Oikopleura was most abundant in the up welling waters over Yucatan Shelf. The segregation distribution of appendicularians in the study area appear to be strongly influenced by up welling and associated currents, and turbidity generated by continental water discharges. It could be assumed that food webs are an important associated factor. We hypothesize that a broad diet and higher filtration efficiency for larger particles (microfitoplankton) allows Oikopleura species to exploit the production in up welling areas, whereas Fritillaria species can not. It may explain its spatial segregation of these genera.
author	Flores-Coto,César Sanvicente-Añorve,Laura Vázquez-Gutiérrez,Felipe Sánchez-Ramírez,Marina
author_facet	Flores-Coto,César Sanvicente-Añorve,Laura Vázquez-Gutiérrez,Felipe Sánchez-Ramírez,Marina
author_sort	Flores-Coto,César
title	Mesoscale distribution of Oikopleura and Fritillaria (Appendicularia) in the Southern Gulf of Mexico: spatial segregation
title_short	Mesoscale distribution of Oikopleura and Fritillaria (Appendicularia) in the Southern Gulf of Mexico: spatial segregation
title_full	Mesoscale distribution of Oikopleura and Fritillaria (Appendicularia) in the Southern Gulf of Mexico: spatial segregation
title_fullStr	Mesoscale distribution of Oikopleura and Fritillaria (Appendicularia) in the Southern Gulf of Mexico: spatial segregation
title_full_unstemmed	Mesoscale distribution of Oikopleura and Fritillaria (Appendicularia) in the Southern Gulf of Mexico: spatial segregation
title_sort	mesoscale distribution of oikopleura and fritillaria (appendicularia) in the southern gulf of mexico: spatial segregation
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572010000300002
work_keys_str_mv	AT florescotocesar mesoscaledistributionofoikopleuraandfritillariaappendiculariainthesoutherngulfofmexicospatialsegregation AT sanvicenteanorvelaura mesoscaledistributionofoikopleuraandfritillariaappendiculariainthesoutherngulfofmexicospatialsegregation AT vazquezgutierrezfelipe mesoscaledistributionofoikopleuraandfritillariaappendiculariainthesoutherngulfofmexicospatialsegregation AT sanchezramirezmarina mesoscaledistributionofoikopleuraandfritillariaappendiculariainthesoutherngulfofmexicospatialsegregation
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Mesoscale distribution of Oikopleura and Fritillaria (Appendicularia) in the Southern Gulf of Mexico: spatial segregation

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