Supplement to: Gambi, Maria Cristina; Musco, Luigi; Giangrande, Adriana; Badalamenti, F; Micheli, Florenza; Kroeker, Kristy J (2016): Distribution and functional traits of polychaetes in a CO2 vent system: winners and losers among closely related species. Marine Ecology Progress Series, 550, 121-134, https://doi.org/10.3354/meps11727