{"refrec":{"BRefID":324152,"RR":"<b>Forcioli, D.; Merle, P.L.; Caligara, C.; Ciosi, M.; Muti, C.; Francour, P.; Cerrano, C.; Allemand, D.</b> (2011). Symbiont diversity is not involved in depth acclimation in the Mediterranean sea whip <i>Eunicella singularis</i>. <i>Mar. Ecol. Prog. Ser. 439</i>: 57-71. <a href=\"https://dx.doi.org/10.3354/meps09314\" target=\"_blank\">https://dx.doi.org/10.3354/meps09314</a>","BEntID":317628,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Mar. Ecol. Prog. Ser. 439</i>: 57-71. <a href=\"https://dx.doi.org/10.3354/meps09314\" target=\"_blank\">https://dx.doi.org/10.3354/meps09314</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Forcioli, D.; Merle, P.L.; Caligara, C.; Ciosi, M.; Muti, C.; Francour, P.; Cerrano, C.; Allemand, D.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Forcioli, D. <i>et al.</i>","Englishabstract":"In symbiotic cnidarians, acclimation to depth and lower irradiance can involve physiological changes in the photosynthetic dinoflagellate endosymbiont, such as increased chlorophyll content, or qualitative modifications in the symbiont population in favour of better adapted strains. It has been argued that a lack of capacity to acquire new symbionts could limit the bathymetric distribution of the host species, or compromise its long-term survival in a changing environment. But is that always true? To address this question, we investigated the symbiont genetic diversity in <i>Eunicella singularis</i>, a Mediterranean sea whip species with a wide bathymetric distribution (10 to 50 m depth), which has recently suffered from mass mortalities after periods of abnormally high sea temperatures. We measured symbiont population densities and chlorophyll content in natural populations, and followed the response of the holobionts after reciprocal transplantations to deep and shallow depths. A total of 161 colonies were sampled at 2 depths (10 and 30 m) at 5 sites in the northwestern Mediterranean. All colonies harboured a single ribosomal <i>Symbiodinium</i> clade (A’), but a relatively high within-clade genetic diversity was found among and within colonies. This diversity was not structured by depth, even though the deeper colonies contained significantly lower population densities of symbionts and less chlorophyll. We did, however, reveal host-symbiont specificity among <i>E. singularis</i> and other Mediterranean cnidarian species. Transplantation experiments revealed a limit of plasticity for symbiont population density and chlorophyll content, which in turn questions the importance of the trophic role of <i>Symbiodinium</i> in <i>E. singularis</i>.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Symbiont diversity is not involved in depth acclimation in the Mediterranean sea whip <i>Eunicella singularis</i>","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-21 01:32:52.628847","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Algal-coral interactions; Symbiodinium; 18S rDNA; Genetic diversity;Depth distribution; Photoacclimation; Eunicella singularis;Mediterranean Sea","OtherDescriptors":null,"Notes":null,"AnaPub":2011,"MonPub":null,"DateUpdate":"2020-05-20","DateCreate":"2020-05-14","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000296068200005","VABBcode":null,"OpenAcc":1,"DOI":"10.3354/meps09314"},"refs":null,"anarec":{"AnaID":324152,"PubliDate":2011,"Pagination":"57-71","XtraPublOfAnaID":null,"ISBN":null,"Volume":"439","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43354,"SerRR":"Marine Ecology Progress Series. 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