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Macrobenthic fauna in the Ensenada de San Simón (Galicia, north-western Spain)

Published online by Cambridge University Press:  25 March 2008

E. Cacabelos ,
L. Gestoso  and
J. Troncoso
E. Cacabelos*
Affiliation:
Área de Biología Animal, Facultad de Ciencias del Mar, Universidad de Vigo, 36310 Lagoas-Marcosende, Vigo (Pontevedra), Spain
L. Gestoso
Affiliation:
Área de Biología Animal, Facultad de Ciencias del Mar, Universidad de Vigo, 36310 Lagoas-Marcosende, Vigo (Pontevedra), Spain
J. Troncoso
Affiliation:
Área de Biología Animal, Facultad de Ciencias del Mar, Universidad de Vigo, 36310 Lagoas-Marcosende, Vigo (Pontevedra), Spain
*
Correspondence should be addressed to: E. Cacabelos Área de Biología Animal Facultad de Ciencias del MarUniversidad de Vigo36310 Lagoas-Marcosende Vigo (Pontevedra)Spain email: cacabelos@uvigo.es
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Abstract

Distribution and abundance of the macrobenthic fauna was studied in the intertidal and subtidal soft-bottoms of the Ensenada de San Simón (north-western Spain). Depth and grain size were the most important factors in determining patterns of distribution of the macrozoobenthos. A reduced Macoma community was present in the inner area of the inlet structured in two facies subdivision in the community that does not affect its qualitative composition: the first one was in intertidal areas associated with meadows of the sea grasses Zostera noltii and Z. marina and defined by the dominance of Hydrobia ulvae; the second facies in intertidal sediments was characterized by the dominance of Tubificidae and nematodes and Pseudopolydora paucibranchiata. The poverty of these bottoms in number of species can be due to salinity fluctuations and human activities developed in the area. Subtidal bottoms were characterized by a Syndosmya(=Abra)alba community. Two facies were detected: one facies located in shallow subtidal bottoms with H. ulvae and Thyasira flexuosa as characteristic species, and a second facies in deeper areas, characterized by the polychaetes Ampharete finmarchica, P. paucibranchiata, Aphelochaeta marioni, Melinna palmata and Paradoneis lyra.

Keywords

macrofaunasoft-bottomsdistributionEnsenada de San SimónAtlantic Ocean
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 88 , Issue 2 , March 2008 , pp. 237 - 245
Copyright
Copyright © Marine Biological Association of the United Kingdom 2008

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