Spatio-temporal distribution of spionids (Polychaeta-Spionidae) in an estuarine system in south-central Chile

This study is based on the identification and distribution of spionid polychaetes in relation to abiotic characteristics of the environment at the mouth of the Valdivia-Tornagaleones estuary in south-central Chile. Four samplings were carried out in 2005, in which eight species were identified inclu...

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Autores principales:	DÍAZ-JARAMILLO,MAURICIO, MUÑOZ,PAMELA, DELGADO-BLAS,VÍCTOR, BERTRÁN,CARLOS
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2008
Materias:	Polychaeta Spionidae distribution estuary salinity sediments Chile
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000400005
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spelling	oai:scielo:S0716-078X20080004000052009-06-08Spatio-temporal distribution of spionids (Polychaeta-Spionidae) in an estuarine system in south-central ChileDÍAZ-JARAMILLO,MAURICIOMUÑOZ,PAMELADELGADO-BLAS,VÍCTORBERTRÁN,CARLOS Polychaeta Spionidae distribution estuary salinity sediments Chile This study is based on the identification and distribution of spionid polychaetes in relation to abiotic characteristics of the environment at the mouth of the Valdivia-Tornagaleones estuary in south-central Chile. Four samplings were carried out in 2005, in which eight species were identified including Aquilaspio peruana, Boccardia polybranchia, Carazziella carrascoi, Dipolydora socialis, Minuspio patagónica, Rhynchospio glutaea, Scolelepis quinquedentata and Spiophanes sp. As it is typical of other estuaries in south central Chile, spionids were an important component of the macroinfauna of the Valdivia estuary. The distribution of the Spionidae family in the system showed higher species richness in the outer reach of the estuary but higher abundance (number of specimens) at the inner reach. The distributional pattern of the polychaetes did not vary throughout the year, exhibiting strong spatial zonation with three significantly different assemblages. Minuspio patagónica, A. peruana and C. carrascoi contributed to the similarity between these three groups, as well as to the formation of a general component in the macroinfauna. Sedimentological and depth variables, as well as sedimentary organic material were only marginally related to the distribution of spionids. Results showed that bottom salinity was the environmental variable responsible for spatial differentiation of spionids in the three groups, which permit to differentiate the outer-reach species from those in the internal area of the estuary. The significant contribution of spionids to the total component of macroinfauna in the studied area shows that these species are a significant component of the estuarine and transition areas in the southwest Pacific coast.info:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.81 n.4 20082008-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000400005en10.4067/S0716-078X2008000400005
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Polychaeta Spionidae distribution estuary salinity sediments Chile
spellingShingle	Polychaeta Spionidae distribution estuary salinity sediments Chile DÍAZ-JARAMILLO,MAURICIO MUÑOZ,PAMELA DELGADO-BLAS,VÍCTOR BERTRÁN,CARLOS Spatio-temporal distribution of spionids (Polychaeta-Spionidae) in an estuarine system in south-central Chile
description	This study is based on the identification and distribution of spionid polychaetes in relation to abiotic characteristics of the environment at the mouth of the Valdivia-Tornagaleones estuary in south-central Chile. Four samplings were carried out in 2005, in which eight species were identified including Aquilaspio peruana, Boccardia polybranchia, Carazziella carrascoi, Dipolydora socialis, Minuspio patagónica, Rhynchospio glutaea, Scolelepis quinquedentata and Spiophanes sp. As it is typical of other estuaries in south central Chile, spionids were an important component of the macroinfauna of the Valdivia estuary. The distribution of the Spionidae family in the system showed higher species richness in the outer reach of the estuary but higher abundance (number of specimens) at the inner reach. The distributional pattern of the polychaetes did not vary throughout the year, exhibiting strong spatial zonation with three significantly different assemblages. Minuspio patagónica, A. peruana and C. carrascoi contributed to the similarity between these three groups, as well as to the formation of a general component in the macroinfauna. Sedimentological and depth variables, as well as sedimentary organic material were only marginally related to the distribution of spionids. Results showed that bottom salinity was the environmental variable responsible for spatial differentiation of spionids in the three groups, which permit to differentiate the outer-reach species from those in the internal area of the estuary. The significant contribution of spionids to the total component of macroinfauna in the studied area shows that these species are a significant component of the estuarine and transition areas in the southwest Pacific coast.
author	DÍAZ-JARAMILLO,MAURICIO MUÑOZ,PAMELA DELGADO-BLAS,VÍCTOR BERTRÁN,CARLOS
author_facet	DÍAZ-JARAMILLO,MAURICIO MUÑOZ,PAMELA DELGADO-BLAS,VÍCTOR BERTRÁN,CARLOS
author_sort	DÍAZ-JARAMILLO,MAURICIO
title	Spatio-temporal distribution of spionids (Polychaeta-Spionidae) in an estuarine system in south-central Chile
title_short	Spatio-temporal distribution of spionids (Polychaeta-Spionidae) in an estuarine system in south-central Chile
title_full	Spatio-temporal distribution of spionids (Polychaeta-Spionidae) in an estuarine system in south-central Chile
title_fullStr	Spatio-temporal distribution of spionids (Polychaeta-Spionidae) in an estuarine system in south-central Chile
title_full_unstemmed	Spatio-temporal distribution of spionids (Polychaeta-Spionidae) in an estuarine system in south-central Chile
title_sort	spatio-temporal distribution of spionids (polychaeta-spionidae) in an estuarine system in south-central chile
publisher	Sociedad de Biología de Chile
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000400005
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Spatio-temporal distribution of spionids (Polychaeta-Spionidae) in an estuarine system in south-central Chile

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