The introduced barnacle Balanus glandula (Darwin) in the Mar del Plata port as a structuring species in the intertidal community

ABSTRACT. The paper deals with the distribution pattern and population dynamics of the introduced barnacle Balanus glandula in the intertidal areas of Mar del Plata port. The reproductive cycle of this barnacle is discussed as a community structuring force. Replicated areas in both the high intertid...

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Autores principales:	Elías,Rodolfo, Vallarino,Eduardo Alberto
Lenguaje:	English
Publicado:	Escuela de Ciencias del Mar. Pontificia Universidad Católica de Valparaíso 2001
Materias:	Balanus glandula intertidal successional pattern port Southwestern Atlantic
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782001000100004
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spelling	oai:scielo:S0717-717820010001000042002-02-12The introduced barnacle Balanus glandula (Darwin) in the Mar del Plata port as a structuring species in the intertidal communityElías,RodolfoVallarino,Eduardo Alberto Balanus glandula intertidal successional pattern port Southwestern Atlantic ABSTRACT. The paper deals with the distribution pattern and population dynamics of the introduced barnacle Balanus glandula in the intertidal areas of Mar del Plata port. The reproductive cycle of this barnacle is discussed as a community structuring force. Replicated areas in both the high intertidal and the upper mid intertidal zones were monthly denuded. The recruitment, cumulative settlement, mortality and growth of B. glandula were recorded, as well as the succession pattern of the associated fauna. First settlement of B. glandula occurred in winter (July). Succession begins with a film of microorganisms followed by green algae (Ulva lactuca and Enteromorpha spp.) which dominate up to a final stage of B. glandula dominated community is reached all along the intertidal. B. glandula densities were significantly higher in the mid intertidal than in the high intertidal (19600 and 13600 ind. m-², respectively). Annual mean mortality was high in the port (up to 62%) but heavy settlement allowed a final density 4 times greater than in the upper mid intertidal of exposed rocky shores, and twice the greatest density reached in the Northern Hemisphere. Winter reproduction of B. glandula, absence of predators, and the neutral or beneficial effect of algae allows this species to occupy in wave protected areas the whole intertidal zone, displacing the former B. amphitrite populations from the intertidal to the subtidal. In exposed rocky shores the species outcompete mussels from the high intertidal, establishing the typical barnacle fringeinfo:eu-repo/semantics/openAccessEscuela de Ciencias del Mar. Pontificia Universidad Católica de ValparaísoInvestigaciones marinas v.29 n.1 20012001-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782001000100004en10.4067/S0717-71782001000100004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Balanus glandula intertidal successional pattern port Southwestern Atlantic
spellingShingle	Balanus glandula intertidal successional pattern port Southwestern Atlantic Elías,Rodolfo Vallarino,Eduardo Alberto The introduced barnacle Balanus glandula (Darwin) in the Mar del Plata port as a structuring species in the intertidal community
description	ABSTRACT. The paper deals with the distribution pattern and population dynamics of the introduced barnacle Balanus glandula in the intertidal areas of Mar del Plata port. The reproductive cycle of this barnacle is discussed as a community structuring force. Replicated areas in both the high intertidal and the upper mid intertidal zones were monthly denuded. The recruitment, cumulative settlement, mortality and growth of B. glandula were recorded, as well as the succession pattern of the associated fauna. First settlement of B. glandula occurred in winter (July). Succession begins with a film of microorganisms followed by green algae (Ulva lactuca and Enteromorpha spp.) which dominate up to a final stage of B. glandula dominated community is reached all along the intertidal. B. glandula densities were significantly higher in the mid intertidal than in the high intertidal (19600 and 13600 ind. m-², respectively). Annual mean mortality was high in the port (up to 62%) but heavy settlement allowed a final density 4 times greater than in the upper mid intertidal of exposed rocky shores, and twice the greatest density reached in the Northern Hemisphere. Winter reproduction of B. glandula, absence of predators, and the neutral or beneficial effect of algae allows this species to occupy in wave protected areas the whole intertidal zone, displacing the former B. amphitrite populations from the intertidal to the subtidal. In exposed rocky shores the species outcompete mussels from the high intertidal, establishing the typical barnacle fringe
author	Elías,Rodolfo Vallarino,Eduardo Alberto
author_facet	Elías,Rodolfo Vallarino,Eduardo Alberto
author_sort	Elías,Rodolfo
title	The introduced barnacle Balanus glandula (Darwin) in the Mar del Plata port as a structuring species in the intertidal community
title_short	The introduced barnacle Balanus glandula (Darwin) in the Mar del Plata port as a structuring species in the intertidal community
title_full	The introduced barnacle Balanus glandula (Darwin) in the Mar del Plata port as a structuring species in the intertidal community
title_fullStr	The introduced barnacle Balanus glandula (Darwin) in the Mar del Plata port as a structuring species in the intertidal community
title_full_unstemmed	The introduced barnacle Balanus glandula (Darwin) in the Mar del Plata port as a structuring species in the intertidal community
title_sort	introduced barnacle balanus glandula (darwin) in the mar del plata port as a structuring species in the intertidal community
publisher	Escuela de Ciencias del Mar. Pontificia Universidad Católica de Valparaíso
publishDate	2001
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782001000100004
work_keys_str_mv	AT eliasrodolfo theintroducedbarnaclebalanusglanduladarwininthemardelplataportasastructuringspeciesintheintertidalcommunity AT vallarinoeduardoalberto theintroducedbarnaclebalanusglanduladarwininthemardelplataportasastructuringspeciesintheintertidalcommunity AT eliasrodolfo introducedbarnaclebalanusglanduladarwininthemardelplataportasastructuringspeciesintheintertidalcommunity AT vallarinoeduardoalberto introducedbarnaclebalanusglanduladarwininthemardelplataportasastructuringspeciesintheintertidalcommunity
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The introduced barnacle Balanus glandula (Darwin) in the Mar del Plata port as a structuring species in the intertidal community

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