Hypersaline stress is a major stressor in semi-enclosed coastal lagoons, affecting the distribution and survival of key foundation species. In this study, we investigated how Posidonia oceanica meadows responded physiologically and morphologically to different salinity concentrations both in-situ, across a natural saline gradient occurring inside the lagoon system, and in a mesocosm experiment. Leaf water relations, organic osmolytes, photosynthesis, respiration, Chlorophyll-a fluorescence, pigments content, and leaf growth were studied in P. oceanica from three different sites within the Stagnone of Marsala lagoon, as well as after exposing P. oceanica to a salinity level of 46 psu in a 30-day mesocosm experiment. Overall, we show that P. oceanica has evolved osmolar regulatory strategies and photosynthetic plasticity, allowing these meadows to cope with large salinity fluctuations (38 – 51.45 PSU). Our findings contribute to a better understanding of seagrass ecophysiological adaptation to extreme environmental conditions, as well as the importance of these populations serving as an experimental model at the Mediterranean scale for more comprehensive forecasting and management of environmental stress in these marine foundation species in an era of rapid environmental change.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Life on the edge: adaptations of Posidonia oceanica to hypersaline conditions in a Mediterranean lagoon system","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-05 01:31:37.254765","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Coastal lagoons; Seagrass; Salinity stress; Mesocosm; in-situ measurements; Mediterranean Sea","OtherDescriptors":null,"Notes":null,"AnaPub":2023,"MonPub":null,"DateUpdate":"2024-03-26","DateCreate":"2024-03-26","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000982318700001","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.envexpbot.2023.105320"},"refs":null,"anarec":{"AnaID":391273,"PubliDate":2023,"Pagination":"105320","XtraPublOfAnaID":null,"ISBN":null,"Volume":"210","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":173384,"SerRR":"Environmental and experimental botany. Elsevier. ISSN 0098-8472; e-ISSN 1873-7307","StandardTitleSer":"Environmental and experimental botany","ISSN":"0098-8472","AbbrevSer":"Environ. Exp. Bot.","StandardTitleMon":null,"StartPage":null,"Pages":null,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Mancuso","Firstname":null,"Initials":"F.P.","Affiliation":"Univ Palermo, Dept Earth & Marine Sci DiSTeM, Viale Sci Ed 16, I-90128 Palermo, Italy.","Discriminator":null,"CorporateFlag":0,"BEntID":389020,"AutID":560477,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Bernardeau-Esteller","Firstname":null,"Initials":"J.","Affiliation":"Oceanog Ctr Murcia, Spanish Oceanog Inst, Seagrass Ecol Grp, Puerto De Mazarron, Spain.","Discriminator":null,"CorporateFlag":0,"BEntID":389020,"AutID":560479,"OrderNr":2,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Spinelli","Firstname":null,"Initials":"M.","Affiliation":"Univ Palermo, Dept Earth & Marine Sci DiSTeM, Viale Sci Ed 16, I-90128 Palermo, Italy.","Discriminator":null,"CorporateFlag":0,"BEntID":389020,"AutID":560480,"OrderNr":3,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Sara","Firstname":null,"Initials":"G.","Affiliation":"Univ Palermo, Dept Earth & Marine Sci DiSTeM, Viale Sci Ed 16, I-90128 Palermo, Italy.","Discriminator":null,"CorporateFlag":0,"BEntID":389020,"AutID":560481,"OrderNr":4,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Ruiz","Firstname":null,"Initials":"J.M.","Affiliation":"Oceanog Ctr Murcia, Spanish Oceanog Inst, Seagrass Ecol Grp, Puerto De Mazarron, Spain.","Discriminator":null,"CorporateFlag":0,"BEntID":389020,"AutID":560483,"OrderNr":5,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Calvo","Firstname":null,"Initials":"S.","Affiliation":"Univ Palermo, Dept Earth & Marine Sci DiSTeM, Viale Sci Ed 16, I-90128 Palermo, Italy.","Discriminator":null,"CorporateFlag":0,"BEntID":389020,"AutID":560484,"OrderNr":6,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Tomasello","Firstname":null,"Initials":"A.","Affiliation":"Univ Palermo, Dept Earth & Marine Sci DiSTeM, Viale Sci Ed 16, I-90128 Palermo, Italy.","Discriminator":null,"CorporateFlag":0,"BEntID":389020,"AutID":560485,"OrderNr":7,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null}],"mapdetails":null,"datasets":null,"monographs":null,"monparts":null,"serparts":null,"BEntOpen":null,"BEntPrivate":null,"availability":[{"BInstID":398052,"LibID":36,"BRefID":391273,"EmbargoDate":null,"FullEmbargoDate":null,"PhysMedID":16,"hasOCRd":null,"ShelfLocCode":"398052","RFID":null,"PaidValue":null,"Medium":"Server","Description":"Interne VLIZ documenten","Acronym":"VLIZ","Library":"Vlaams Instituut voor de Zee","DutchTerm":"Non-open access","URL":null,"ClassifID":228,"Classification":"Non-open access","ReqLink":1,"ClassifTypID":3,"URLLocation":"https://www.vliz.be/imisdocs/publications/","SubDir":1,"InternalReq":1,"LoggedInReq":1,"Disclaimer":"Disclaimer_VLIZ_Intern","DutchDisclaimer":"
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