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Titre du document / Document title

Settlement sites, survival and effects on benthos of an introduced reef-building polychaete in a SW Atlantic coastal lagoon

Auteur(s) / Author(s)

SCHWINDT Evangelina (1) ; IRIBARNE Oscar Osvaldo (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Departamento de Biología (FCEyN), Universidad Nacional de Mar del Plata, CC 573, Correo Central, (7600) Mar del Plata, ARGENTINE

Résumé / Abstract

Ficopomatus enigmaticus is a cosmopolitan, reef-building serpulid polychaete introduced to the Mar Chiquita coastal lagoon, Argentina, before 1970. Today reefs of this species cover approximately 80% of the lagoon. Each reef is up to 4 m in diameter and 0.5 m high and is formed of thousands of calcareous tubes of F. enigmaticus. We investigated through experiments and observation the selection of settlement substrate by F. enigmaticus larvae and their effect on the benthic community. Settlement sites were primarily shells of the gastropod Adelomelon brasiliana and secondarily the bivalves Mactra isabelleana and Tagelus plebeius, but long-term survival was mainly found in the inner area of A. brasiliana shells, suggesting the importance of refuge. Large population of the amphipod Melita palmata and the gastropod Littoridina parchappi lived between the F. enigmaticus tubes. The most common benthic polychaete species inhabiting the sediment around the reefs showed variation in density (Heteromastus similis and Laeonereis acuta decreased whereas Nephtys fluviatilis increased) as the result of distance from the reefs. The abundance of adult crabs (Cyrtograpsus angulatus) was much higher underneath the reefs than in the sediment around the reefs. Reefs largely increased habitat structure, modifying the abundance of species that inhabit in shelters and changed the pattern of distribution of soft-bottom species.

Revue / Journal Title

Bulletin of marine science    ISSN  0007-4977   CODEN BMRSAW 

Source / Source

Congrès
International Polychaete Conference No6, Curitiba, Paraná , BRESIL (02/08/1998)
2000, vol. 67, no 1 (675 p.)  (1 p.1/4), [Notes: Papers and abstracts], pp. 73-82

Langue / Language

Anglais

Editeur / Publisher

Allen, Lawrence, KA, ETATS-UNIS  (1965) (Revue)

Mots-clés anglais / English Keywords

Site

;

Colonization

;

Introduced species

;

Benthic organism

;

Survival

;

Interspecific relation

;

Zoobenthos

;

Coastal lagoon

;

Reef

;

Argentina

;

South Pacific

;

Bivalvia

;

South America

;

America

;

Pacific Ocean

;

Brackish water environment

;

Mollusca

;

Invertebrata

;

Polychaeta

;

Annelida

;

Mots-clés français / French Keywords

Site

;

Colonisation

;

Espèce introduite

;

Organisme benthique

;

Survie

;

Relation interspécifique

;

Zoobenthos

;

Lagune

;

Récif

;

Argentine

;

Océan Pacifique Sud

;

Bivalvia

;

Ficopomatus enigmaticus

;

Serpulidae

;

Amérique du Sud

;

Amérique

;

Océan Pacifique

;

Milieu saumâtre

;

Mollusca

;

Invertebrata

;

Polychaeta

;

Annelida

;

Mots-clés espagnols / Spanish Keywords

Sitio

;

Colonización

;

Especie introducida

;

Organismo bénthico

;

Sobrevivencia

;

Relación interespecífica

;

Zoobentos

;

Laguna

;

Arrecife

;

Argentina

;

Océano Pacífico Sur

;

Bivalvia

;

America del sur

;

America

;

Océano Pacífico

;

Medio salobre

;

Mollusca

;

Invertebrata

;

Polychaeta

;

Annelida

;

Localisation / Location

INIST-CNRS, Cote INIST : 11286, 35400009278871.0060

Nº notice refdoc (ud4) : 830469



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