{"refrec":{"BRefID":211272,"RR":"<b>Hétérier, V.; David, B.; De Ridder, C.; Rigaud, T.</b> (2008). Ectosymbiosis is a critical factor in. the local benthic biodiversity of the Antarctic deep sea. <i>Mar. Ecol. Prog. Ser. 364</i>: 67-76. <a href=\"http://dx.doi.org/10.3354/meps07487\" target=\"_blank\">dx.doi.org/10.3354/meps07487</a>","BEntID":203194,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Mar. Ecol. Prog. Ser. 364</i>: 67-76. <a href=\"https://dx.doi.org/10.3354/meps07487\" target=\"_blank\">https://dx.doi.org/10.3354/meps07487</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Hétérier, V.; David, B.; De Ridder, C.; Rigaud, T.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Hétérier, V. <i>et al.</i>","Englishabstract":"In deep-sea benthic environments, competition for hard substrates is a critical factor in the distribution and diversity of organisms. In this context, the occurrence of biotic substrates in addition to mineral substrates may change the characteristics of sessile fauna. We tested this hypothesis at different localities of the Weddell Sea (Antarctica) by Studying the diversity of ectosymbionts living on the spines of cidaroids (echinoids), The presence of cidaroids promoted a higher total specific richness and increased sessile species abundance, but did riot change the diversity. Analyses of species distribution suggested that the cidaroids are a favourable habitat for sessile organisms, compared to rocks, but are colonized by relatively specialist sessile species, leaving the unfavourable rock habitat to more generalist species. 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