title: Effect of the invader Boccardia proboscidea (Polychaeta: Spionidae) on richness, diversity and structure of SW Atlantic epilithic intertidal community.
abstract: In Mar del Plata (Argentine, SW Atlantic), a large seaside resort, the sewage discharges impact the littoral ecosystem. The invader polychaete Boccardia proboscidea has developed reefs since spring of 2008. The effect of this species on the richness, diversity and structure of epilithic intertidal community was assessed through an MBACI design in both sewage-impacted and reference sites, and Before/After the invasion. The presence of reefs of B. proboscidea since spring 2008 has caused a significant reduction of total individuals, total taxa and diversity in sewage-impacted sites regarding the reference ones. The species analyzed showed a high variable response because patterns were dominated by small-scale variability. Occasional peaks in abundance were observed on a single sampling site and time and a large variation among replicates. The associated fauna, formerly rich and diverse in impacted sites, shows a tendency to disappear as the ecosystem engineer Brachidontes rodriguezii is replaced by monocultures of B. proboscidea.
authors.affiliation: Laboratorio de Bioindicadores Bentónicos, Universidad Nacional de Mar del Plata - Instituto de Investigaciones Marinas y Costeras (IIMyC), Deán Funes 3350, B 7602 AYL Mar del Plata, Argentina. Electronic address: roelias@mdp.edu.ar.
authors.forename: Rodolfo
authors.initials: R
authors.lastname: Elías
authors.affiliation: Laboratorio de Bioindicadores Bentónicos, Universidad Nacional de Mar del Plata - Instituto de Investigaciones Marinas y Costeras (IIMyC), Deán Funes 3350, B 7602 AYL Mar del Plata, Argentina. Electronic address: mljaubet@mdp.edu.ar.
authors.forename: María L
authors.initials: ML
authors.lastname: Jaubet
authors.affiliation: Laboratorio de Bioindicadores Bentónicos, Universidad Nacional de Mar del Plata - Instituto de Investigaciones Marinas y Costeras (IIMyC), Deán Funes 3350, B 7602 AYL Mar del Plata, Argentina. Electronic address: elizabethllanos@mdp.edu.ar.
authors.forename: Elizabeth N
authors.initials: EN
authors.lastname: Llanos
authors.affiliation: Laboratorio de Bioindicadores Bentónicos, Universidad Nacional de Mar del Plata - Instituto de Investigaciones Marinas y Costeras (IIMyC), Deán Funes 3350, B 7602 AYL Mar del Plata, Argentina. Electronic address: masanchez@mdp.edu.ar.
authors.forename: María A
authors.initials: MA
authors.lastname: Sanchez
authors.affiliation: Laboratorio de Bioindicadores Bentónicos, Universidad Nacional de Mar del Plata - Instituto de Investigaciones Marinas y Costeras (IIMyC), Deán Funes 3350, B 7602 AYL Mar del Plata, Argentina. Electronic address: msrivero@mdp.edu.ar.
authors.forename: María S
authors.initials: MS
authors.lastname: Rivero
authors.affiliation: Laboratorio de Bioindicadores Bentónicos, Universidad Nacional de Mar del Plata - Instituto de Investigaciones Marinas y Costeras (IIMyC), Deán Funes 3350, B 7602 AYL Mar del Plata, Argentina. Electronic address: garaffo@mdp.edu.ar.
authors.forename: Griselda V
authors.initials: GV
authors.lastname: Garaffo
authors.affiliation: Centro de Estudos do Mar - Universidade Federal do Paraná, Pontal do Sul, PR, Brazil. Electronic address: leonardosandrini@gmail.com.
authors.forename: Leonardo
authors.initials: L
authors.lastname: Sandrini-Neto
mesh_terms: D000818:Animals; D001118:Argentina; D044822:Biodiversity; D017753:Ecosystem; D058865:Introduced Species; D011077:Polychaeta; D012621:Seasons; D012722:Sewage
chemical_list: D012722:Sewage
keywords: Auto-ecosystem engineer; Boccardia proboscidea; Diversity; Intertidal community structure; Invasive polychaete; SW Atlantic