title: Characteristics of the mesophotic megabenthic assemblages of the vercelli seamount (north tyrrhenian sea).
abstract: The biodiversity of the megabenthic assemblages of the mesophotic zone of a Tyrrhenian seamount (Vercelli Seamount) is described using Remotely Operated Vehicle (ROV) video imaging from 100 m depth to the top of the mount around 61 m depth. This pinnacle hosts a rich coralligenous community characterized by three different assemblages: (i) the top shows a dense covering of the kelp Laminaria rodriguezii; (ii) the southern side biocoenosis is mainly dominated by the octocorals Paramuricea clavata and Eunicella cavolinii; while (iii) the northern side of the seamount assemblage is colonized by active filter-feeding organisms such as sponges (sometimes covering 100% of the surface) with numerous colonies of the ascidian Diazona violacea, and the polychaete Sabella pavonina. This study highlights, also for a Mediterranean seamount, the potential role of an isolated rocky peak penetrating the euphotic zone, to work as an aggregating structure, hosting abundant benthic communities dominated by suspension feeders, whose distribution may vary in accordance to the geomorphology of the area and the different local hydrodynamic conditions.
authors.affiliation: DisMar, Università Politecnica delle Marche, Ancona, Italy. m.bo@univpm.it
authors.forename: Marzia
authors.initials: M
authors.lastname: Bo
authors.forename: Marco
authors.initials: M
authors.lastname: Bertolino
authors.forename: Mireno
authors.initials: M
authors.lastname: Borghini
authors.forename: Michela
authors.initials: M
authors.lastname: Castellano
authors.forename: Anabella
authors.initials: A
authors.lastname: Covazzi Harriague
authors.forename: Cristina Gioia
authors.initials: CG
authors.lastname: Di Camillo
authors.forename: Gianpietro
authors.initials: G
authors.lastname: Gasparini
authors.forename: Cristina
authors.initials: C
authors.lastname: Misic
authors.forename: Paolo
authors.initials: P
authors.lastname: Povero
authors.forename: Antonio
authors.initials: A
authors.lastname: Pusceddu
authors.forename: Katrin
authors.initials: K
authors.lastname: Schroeder
authors.forename: Giorgio
authors.initials: G
authors.lastname: Bavestrello
mesh_terms: D000818:Animals; D044822:Biodiversity; D058448:Biota; D003198:Computer Simulation; D005843:Geography; D019015:Geologic Sediments; D057446:Hydrodynamics; D007558:Italy; D008522:Mediterranean Sea; D009791:Oceanography