First record of Phyllochaetopterus socialis Claparède, 1870 (Annelida: Polychaeta) in Mar del Plata Harbor, Buenos Aires, Argentina

Albano, Mariano; Pon, Juan Pablo Seco; Obenat, Sandra; Genzano, Gabriel N.

doi:10.4067/s0718-19572006000200013

Cited by 2 publications

(1 citation statement)

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“…Beyond these records, P. socialis was cited for the region by Rullier & Amoureux (1979), Pastor de Ward (2000), Obenat et al (2001), Capítoli (2002), Giberto (2003) and Giberto et al (2004). The presence of P. socialis aggregates in the Mar del Plata harbour was recorded for the first time by Albano et al (2006b). It is possible that the registers of P. pictus published by Hartmann-Schröder (1983) could correspond to the same species (Orensanz, personal communication).…”

Section: Methodsmentioning

confidence: 88%

Assemblage of benthic macrofauna in the aggregates of the tubiculous worm Phyllochaetopterus socialis in the Mar del Plata harbour, Argentina

Albano

Obenat

2009

J. Mar. Biol. Ass.

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The assemblage and the temporal changes of benthic macrofauna inhabiting the Phyllochaetopterus socialis (Polychaeta: Chaetopteridae) aggregates were analysed during 2004 and May 2005 in the Mar del Plata harbour, Buenos Aires (Argentina). Species composition, abundance, richness and diversity were estimated from monthly or bimonthly samples obtained by SCUBA diving. Multivariate (MDS) and SIMPER analyses were applied to analyse the structure of benthic communities. In the mats, a total of 57 species (invertebrates and chordates) belonging to 11 phyla were associated to P. socialis: crustaceans and molluscs were the most abundant species and crustaceans and polychaetes were the most diverse groups (14 and 11 species richness, respectively). The mean abundance ranged from 79.67±57.47 ind/250 ml to 718.75 ind/250 ml (mean±SD). The amphipod Monocorophium insidiosum, the gastropod Anachis isabellei and the tanaidacean Leptognathia sp. were the most representative species in the mats. Richness and diversity in P. socialis aggregates were higher than in surrounding sediments. Results show significant differences among months in composition, abundance and feeding guilds of the macrofauna associated with the mats. The assemblage of benthic macrofauna with permanent and temporary organisms in P. socialis aggregates suggests the existence of microhabitats in the mats that provide substrate, refuges for predation and availability of food increasing richness and diversity. These results allow considering P. socialis as an autogenic ecosystem engineer in the Mar del Plata harbour.

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Section: Methodsmentioning

confidence: 88%