{"refrec":{"BRefID":137908,"RR":"<b>Molenaar, H.; Meinesz, A.; Thibaut, T.</b> (2009). Alterations of the structure of <i>Posidonia oceanica</i> beds due to the introduced alga <i>Caulerpa taxifolia</i>. <i>Sci. Mar. (Barc.) 73(2)</i>: 329-335. <a href=\"https://dx.doi.org/10.3989/scimar.2009.73n2329\" target=\"_blank\">https://dx.doi.org/10.3989/scimar.2009.73n2329</a>","BEntID":131639,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Sci. Mar. (Barc.) 73(2)</i>: 329-335. <a href=\"https://dx.doi.org/10.3989/scimar.2009.73n2329\" target=\"_blank\">https://dx.doi.org/10.3989/scimar.2009.73n2329</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Molenaar, H.; Meinesz, A.; Thibaut, T.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Molenaar, H. <i>et al.</i>","Englishabstract":"The impact of <i>Caulerpa taxifolia</i> on the structure of shallow <i>Posidonia oceanica</i> beds was studied in permanent quadrats from 1995 to 2005 at the invaded site of Cap Martin and the control site of Cap d’Antibes (French Riviera, France). The cover of <i>C. taxifolia</i>, shoot density, number of orthotropic and plagiotropic shoots and proportion of ramifications of <i>P. oceanica</i> were measured yearly. The cover of <i>C. taxifolia</i> in the invaded zone rapidly reached a maximum of infestation in 2000 with 93% of the quadrats covered by the alga. In 2001 an unexplained phenomenon led to a sharp decrease in the infestation and in the following years the colonisation remained low. Within the 10 years of the study, <i>P. oceanica</i> did not disappear from the permanent quadrats, but we observed a drastic change in the structure of the meadow invaded by <i>C. taxifolia</i>. Between 1999 and 2000 a decrease in the shoot density observed at both sites was probably related to the warm temperature event recorded in 1999 (from 636 to 143 shoots m<sup>-2</sup> at the invaded site and from 488 to 277 at the control site). At the invaded site, the seagrass never recovered its initial density even after a sharp decrease in <i>C. taxifolia</i>. The orthotropic/plagiotropic shoot ratio was strongly modified at the invaded site, where plagiotropic shoots became dominant because of an increase in their ramification.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Alterations of the structure of <i>Posidonia oceanica</i> beds due to the introduced alga <i>Caulerpa taxifolia</i>","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-05-20 01:32:11.287823","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Caulerpa taxifolia; Posidonia oceanica; competition; ecological impact","OtherDescriptors":null,"Notes":null,"AnaPub":2009,"MonPub":null,"DateUpdate":"2018-02-13","DateCreate":"2009-06-18","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000267573000011","VABBcode":null,"OpenAcc":1,"DOI":"10.3989/scimar.2009.73n2329"},"refs":null,"anarec":{"AnaID":137908,"PubliDate":2009,"Pagination":"329-335","XtraPublOfAnaID":null,"ISBN":null,"Volume":"73","Issue":"2","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43791,"SerRR":"Scientia Marina (Barcelona). 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