{"refrec":{"BRefID":121355,"RR":"<b>Lepoint, G.; Frédérich, B.; Gobert, S.; Parmentier, E.</b> (2008). Isotopic ratios and elemental contents as indicators of seagrass C processing and sewage influence in a tropical macrotidal ecosystem (Madagascar, Mozambique Channel). <i>Sci. Mar. (Barc.) 72(1)</i>: 109-117. <a href=\"http://dx.doi.org/10.3989/scimar.2008.72n1109\" target=\"_blank\">dx.doi.org/10.3989/scimar.2008.72n1109</a>","BEntID":115451,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Sci. Mar. (Barc.) 72(1)</i>: 109-117. <a href=\"https://dx.doi.org/10.3989/scimar.2008.72n1109\" target=\"_blank\">https://dx.doi.org/10.3989/scimar.2008.72n1109</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Lepoint, G.; Frédérich, B.; Gobert, S.; Parmentier, E.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Lepoint, G. <i>et al.</i>","Englishabstract":"Isotopic ratios and elemental concentrations of carbon and nitrogen were measured in seven seagrass species colonising different tidal flats near Toliara (SW Madagascar) in order to determine the potential use of these parameters for assessing C processing and sewage use by tropical seagrasses. Nitrogen concentrations measured in upper intertidal seagrasses near Toliara were almost twice those measured on the tidal flat near a healthy mangrove situated 20 km away from Toliara town. At Toliara Beach, d<sup>15</sup>N values were correlated with the N concentrations of Halodule sp., one of the dominant species on the tidal flat. This correlation did not exist for <em>Halophila ovalis</em>, the other dominant species. An increase in N concentrations and d<sup>15</sup>N values demonstrates the influence of sewage coming directly onto Toliara Beach on the N cycles of intertidal seagrasses. Nevertheless, this influence seems restricted to the upper littoral zone and was not the main cause of seagrass die-off. On the other hand, at the mangrove site, d<sup>15</sup>N values were not correlated with the N concentrations of <em>Halodule</em> sp. or <em>Thalassia hemprichii</em>, showing that natural d<sup>15</sup>N variability is driven by other factors than the d<sup>15</sup>N of N sources. Moreover, inter-individual variability of d<sup>15</sup>N values was greater than inter-specific or inter-site variability, making the d<sup>15</sup>N difficult to interpret in the context of human-disturbance influence on the N cycle of tropical seagrasses. d<sup>13</sup>C values were close to -9‰, indicating the use of HCO<sub>3</sub><sup>-</sup> as an inorganic carbon source by the seven investigated species. Contrary to our hypothesis, variation between sites and location on the tidal flat was limited, suggesting limited impact on d<sup>13</sup>C values of sewage, emersion duration and mechanisms for HCO<sub>3</sub>- incorporation.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Isotopic ratios and elemental contents as indicators of seagrass C processing and sewage influence in a tropical macrotidal ecosystem (Madagascar, Mozambique Channel)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 08:33:14.980000","timezone_type":1,"timezone":"+00:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"sewage impact; coastal ecosystem; seagrass; stable isotopes; tidal habitat; SW Indian Ocean","OtherDescriptors":null,"Notes":null,"AnaPub":2008,"MonPub":null,"DateUpdate":"2016-06-12","DateCreate":"2008-04-07","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000254044300009","VABBcode":null,"OpenAcc":1,"DOI":"10.3989/scimar.2008.72n1109"},"refs":null,"anarec":{"AnaID":121355,"PubliDate":2008,"Pagination":"109-117","XtraPublOfAnaID":null,"ISBN":null,"Volume":"72","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43791,"SerRR":"Scientia Marina (Barcelona). Consejo Superior de Investigaciones Científicas. Institut de Ciènces del Mar: Barcelona.  ISSN 0214-8358; e-ISSN 1886-8134","StandardTitleSer":"Scientia Marina (Barcelona)","ISSN":"0214-8358","AbbrevSer":"Sci. Mar. (Barc.)","StandardTitleMon":null,"StartPage":109,"Pages":9,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Lepoint","Firstname":"Gilles","Initials":"G.","Affiliation":"MARE centre, Laboratoire d’Océanologie, Institut de Chimie, Bât B6c, Université de Liège","Discriminator":null,"CorporateFlag":0,"BEntID":115451,"AutID":145793,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":"Université de Liège; Faculté des Sciences; Département de Biologie, Ecologie et Evolution; Laboratoire d'Océanologie Biologique","ORCID":"0000-0003-4375-0357","PersID":7091,"InsID":459},{"AutName":"Frédérich","Firstname":"Bruno","Initials":"B.","Affiliation":"MARE centre, Laboratoire de Morphologie Fonctionnelle et Evolutive","Discriminator":null,"CorporateFlag":0,"BEntID":115451,"AutID":145795,"OrderNr":2,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":"Université de Liège; Faculté des Sciences; Département de Biologie, Ecologie et Evolution; Laboratoire de Morphologie Fonctionelle et Evolutive","ORCID":"0000-0003-3438-0243","PersID":27271,"InsID":3836},{"AutName":"Gobert","Firstname":"Sylvie","Initials":"S.","Affiliation":"MARE centre, Laboratoire d’Océanologie, Institut de Chimie, Bât B6c, Université de Liège","Discriminator":null,"CorporateFlag":0,"BEntID":115451,"AutID":145794,"OrderNr":3,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":"Université de Liège; Faculté des Sciences; Département de Biologie, Ecologie et Evolution; Laboratoire d'Océanologie Biologique","ORCID":"0000-0001-6000-0190","PersID":7089,"InsID":459},{"AutName":"Parmentier","Firstname":"Eric","Initials":"E.","Affiliation":"MARE centre, Laboratoire de Morphologie Fonctionnelle et Evolutive","Discriminator":null,"CorporateFlag":0,"BEntID":115451,"AutID":145796,"OrderNr":4,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":"Université de Liège; Faculté des Sciences; Département de Biologie, Ecologie et Evolution; Laboratoire de Morphologie Fonctionelle et Evolutive","ORCID":"0000-0002-0391-7530","PersID":7071,"InsID":3836}],"mapdetails":null,"datasets":null,"monographs":null,"monparts":null,"serparts":null,"BEntOpen":null,"BEntPrivate":null,"availability":[{"BInstID":133662,"LibID":36,"BRefID":121355,"EmbargoDate":null,"FullEmbargoDate":null,"PhysMedID":16,"hasOCRd":1,"ShelfLocCode":"133662","RFID":null,"PaidValue":null,"Medium":"Server","Description":"VLIZ Open Access","Acronym":"VLIZ","Library":"Vlaams Instituut voor de Zee","DutchTerm":"Open access","URL":null,"ClassifID":53,"Classification":"Open access","ReqLink":null,"ClassifTypID":1,"URLLocation":"https://www.vliz.be/imisdocs/publications/","SubDir":null,"InternalReq":0,"LoggedInReq":0,"Disclaimer":null,"DutchDisclaimer":null,"FileFormat":".pdf","FileDescr":"pdf","InsPub":1,"InsID":36,"FileFormID":6,"LendableFlag":1,"PublicFlag":1,"orderLib":"A","Notes":null,"AccConID":null,"AccessConstraint":null,"LicURL":null}],"litstyles":null,"thespers":null,"arch2discl":null,"SERpubls":[{"PublName":"Consejo Superior de Investigaciones Científicas. Institut de Ciènces del Mar","City":"Barcelona"}],"MONpubls":null,"pictures":[],"thestermsPath":[{"ThesaurusTerm":"Coastal environment","ThestID":1635,"Acronym":"ASFA","ThesTermPath":"Coastal environment"},{"ThesaurusTerm":"Nitrogen cycle","ThestID":5567,"Acronym":"ASFA","ThesTermPath":"Cycles > Chemical cycles > Geochemical cycle > Biogeochemical cycle > Nutrient cycles > Nitrogen cycle"},{"ThesaurusTerm":"Ecosystems","ThestID":2638,"Acronym":"ASFA","ThesTermPath":"Ecosystems"},{"ThesaurusTerm":"Habitat","ThestID":3851,"Acronym":"ASFA","ThesTermPath":"Habitat"},{"ThesaurusTerm":"Impacts","ThestID":4252,"Acronym":"ASFA","ThesTermPath":"Impacts"},{"ThesaurusTerm":"Carbon isotopes","ThestID":1335,"Acronym":"ASFA","ThesTermPath":"Isotopes > Carbon isotopes"},{"ThesaurusTerm":"ISW, Indian Ocean","ThestID":185393,"Acronym":"ASFA_GEOT","ThesTermPath":"ISW, Indian Ocean"},{"ThesaurusTerm":"ISW, Malagasy Rep., Toliara","ThestID":185423,"Acronym":"ASFA_GEOT","ThesTermPath":"ISW, Malagasy Rep., Toliara"},{"ThesaurusTerm":"ISW, Mozambique Channel","ThestID":185440,"Acronym":"ASFA_GEOT","ThesTermPath":"ISW, Mozambique Channel"},{"ThesaurusTerm":"Seagrass","ThestID":7311,"Acronym":"ASFA","ThesTermPath":"Seagrass"},{"ThesaurusTerm":"Tidal flats","ThestID":8580,"Acronym":"ASFA","ThesTermPath":"Topographic features > Landforms > Coastal landforms > Tidal flats"},{"ThesaurusTerm":"Sewage","ThestID":7510,"Acronym":"ASFA","ThesTermPath":"Wastes > Sewage"}],"thestermsASFA":[{"ThesaurusTerm":"Carbon isotopes"},{"ThesaurusTerm":"Ecosystems"},{"ThesaurusTerm":"Habitat"},{"ThesaurusTerm":"ISW, Indian Ocean"},{"ThesaurusTerm":"ISW, Malagasy Rep., Toliara"},{"ThesaurusTerm":"ISW, Mozambique Channel"},{"ThesaurusTerm":"Nitrogen cycle"},{"ThesaurusTerm":"Sewage"},{"ThesaurusTerm":"Tidal flats"}],"taxtermsASFA":[{"TaxTerm":"Halophila ovalis"},{"TaxTerm":"Thalassia hemprichii"}],"geotermsASFA":[{"GeoTerm":"Indian Ocean"},{"GeoTerm":"Mozambique Channel"},{"GeoTerm":"Toliara"}],"collections":[{"Collection":"OMA - Open Marien Archief","ShortName":"OMA"}],"conf":null,"proj":null,"Physdatasets":null,"spcols":{"222":{"SpName":"BMB - Belgische Mariene Bibliografie","SpColID":222,"ParSpColID":null,"TopParID":null,"ShortName":"BMB","URLLocation":null,"LibID":36,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"BMB"},"221":{"SpName":"OMA - Open Marien Archief","SpColID":221,"ParSpColID":null,"TopParID":null,"ShortName":"OMA","URLLocation":null,"LibID":36,"OpenRepoFlag":1,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"OMA"}},"doi":null,"publs":null,"serparttypes":null,"monauthors":null,"MParts":null,"SParts":null,"hLibs":null,"langs":[{"BEntID":115451,"AbstractFlag":-1,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"},{"BEntID":115451,"AbstractFlag":0,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"}],"urls":[{"URL":"https://dx.doi.org/10.3989/scimar.2008.72n1109","externalID":"10.3989/scimar.2008.72n1109","URLTypeCode":"DOI","URLID":21387,"URLTypID":13,"URLType":"DOI","URLPrefix":"http://dx.doi.org/"}],"thesterms":[{"ThesaurusTerm":"Carbon isotopes","ThestID":1335,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Coastal environment","ThestID":1635,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Ecosystems","ThestID":2638,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Habitat","ThestID":3851,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Impacts","ThestID":4252,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"ISW, Indian Ocean","ThestID":185393,"Acronym":"ASFA_GEOT","ThesTypID":34,"ThesType":"ASFA Geoterms"},{"ThesaurusTerm":"ISW, Malagasy Rep., Toliara","ThestID":185423,"Acronym":"ASFA_GEOT","ThesTypID":34,"ThesType":"ASFA Geoterms"},{"ThesaurusTerm":"ISW, Mozambique Channel","ThestID":185440,"Acronym":"ASFA_GEOT","ThesTypID":34,"ThesType":"ASFA Geoterms"},{"ThesaurusTerm":"Nitrogen cycle","ThestID":5567,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Seagrass","ThestID":7311,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Sewage","ThestID":7510,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Tidal flats","ThestID":8580,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"}],"taxterms":[{"TaxTerm":"Halophila ovalis","AphiaID":208930,"TaxtID":23873},{"TaxTerm":"Thalassia hemprichii","AphiaID":208931,"TaxtID":22909}],"geoterms":[{"GeoTerm":"Indian Ocean","GeoObjectID":1904,"GeotID":3680},{"GeoTerm":"Mozambique Channel","GeoObjectID":4261,"GeotID":3727},{"GeoTerm":"Toliara","GeoObjectID":14788,"GeotID":3710}],"othterms":null,"asfacodes":null,"asfa2codes":null,"thestermsFRIS":[{"ThesaurusTerm":"Carbon isotopes","DutchTerm":"Koolstof isotopen","ThestID":1335,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Coastal environment","DutchTerm":"Kustmilieu","ThestID":1635,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Ecosystems","DutchTerm":"Ecosystemen","ThestID":2638,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Habitat","DutchTerm":"Habitat","ThestID":3851,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Impacts","DutchTerm":"Impact","ThestID":4252,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"ISW, Indian Ocean","DutchTerm":null,"ThestID":185393,"Acronym":"ASFA_GEOT","ThesTypID":34,"ThesType":"ASFA Geoterms"},{"ThesaurusTerm":"ISW, Malagasy Rep., Toliara","DutchTerm":null,"ThestID":185423,"Acronym":"ASFA_GEOT","ThesTypID":34,"ThesType":"ASFA Geoterms"},{"ThesaurusTerm":"ISW, Mozambique Channel","DutchTerm":null,"ThestID":185440,"Acronym":"ASFA_GEOT","ThesTypID":34,"ThesType":"ASFA Geoterms"},{"ThesaurusTerm":"Nitrogen cycle","DutchTerm":"Stikstofcyclus","ThestID":5567,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Seagrass","DutchTerm":"Zeegras","ThestID":7311,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Sewage","DutchTerm":"Rioolwater","ThestID":7510,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Tidal flats","DutchTerm":"Wadden; Slikken","ThestID":8580,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"}],"taxtermsFRIS":[{"TaxTerm":"Halophila ovalis","DutchTerm":null,"AphiaID":208930,"TaxtID":23873},{"TaxTerm":"Thalassia hemprichii","DutchTerm":null,"AphiaID":208931,"TaxtID":22909}],"geotermsFRIS":[{"GeoTerm":"Indian Ocean","DutchTerm":"Indische Oceaan"},{"GeoTerm":"Mozambique Channel","DutchTerm":null},{"GeoTerm":"Toliara","DutchTerm":null}],"othtermsFRIS":null,"resmessage":"","complete":1,"sessions":{"newSesName":"Chisala, Chilekwa, C.","newSesDate":{"date":"2008-04-07 10:02:52.670000","timezone_type":3,"timezone":"Europe/Brussels"},"updSesName":"Lyssens, Liesbeth, L.","updSesDate":{"date":"2016-06-12 21:36:46.887000","timezone_type":3,"timezone":"Europe/Brussels"}}}