{"refrec":{"BRefID":196972,"RR":"<b>Afli, A.</b> (1999). Variabilité temporelle des peuplements macrobenthiques de la partie orientale du golfe du Morbihan (Bretagne) = Temporal variability of the macrobenthic communities in the Eastern part of the Gulf of Morbihan (Brittany). PhD Thesis. Université de Bretagne Occidentale: Brest.  192 pp.","BEntID":189387,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":". PhD Thesis. Université de Bretagne Occidentale: Brest.  192 pp.","DocTypID":5,"DocType":"Book/Monograph","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Afli, A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Afli, A.","Englishabstract":null,"AbstractOtherLang":"LA PARTIE ORIENTALE  DU GOLFE DU  MORBIHAN A FAIT L'OBJET D'UNE ETUDE DETAILLEE EN 1961 MENEE PAR GLEMAREC. NOUS AVONS REVISITE CE MEME SECTEUR EN 1995 D'AUTANT QUE DES  ECHANTILLONNAGES PLUS PARTIELS AVAIENT ETE REALISES EN 1969 ET EN 1975. TOUTES CES DONNEES ONT PERMIS D'ETUDIER LA  FLUCTUATION DES PEUPLEMENTS MACROFAUNIQUES SUR UNE PERIODE DE 35 ANS. UNE TELLE ETUDE DE SUIVI A LONG-TERME N'A ETE ABORDEE JUSQU'ICI QUE PAR PEARSON ET SES COLLABORATEURS (1985). LES FACTEURS ENVIRONNEMENTAUX RESPONSABLES DES EVOLUTIONS DE LA  MACROFAUNE BENTHIQUE SONT NOMBREUX, LES PLUS IMPORTANTS DANS LE CAS ETUDIE SEMBLENT : (1) LA FLUCTUATION DES HERBIERS DE ZOSTERES, (2) L'EUTROPHISATION ENGENDREE PAR L'ACCROISSEMENT DES  APPORTS DE NUTRIMENTS DE DIFFERENTES NATURES PROVENANT ESSENTIELLEMENT DU BASSIN VERSANT, (3) L'INTRODUCTION VOLONTAIRE OU PASSIVE DES ESPECES INVASIVES (CREPIDULA FORNICATA, SARGASSUM NITUCUM, CYCLOPE NERITEA, RUDITAPES PHILIPPINARUM) ET (4) L'ENVASEMENT CONTINU DES  SEDIMENTS SUITE A LA DISPARITION DES ZOSTERES ET AUX ACTIVITES DE DRAGAGE (HUITRE AUTREFOIS ET PALOURDE AUJOURD'HUI). LES POPULATIONS MACROFAUNIQUES, FACE A DE TELLES CONDITIONS, REAGISSENT DIFFEREMMENT EN TERME D'EFFECTIFS, ELLES CONSTITUENT DONC UN MATERIEL EFFICACE POUR DECELER LES PREMIERS SIGNES D'EUTROPHISATION ET DE PERTURBATION. LA TOTALITE DU BASSIN ORIENTAL EST TOUCHEE PAR CES ACTIONS ET A VU SES PEUPLEMENTS  SE DEGRADER, CECI S'EST MANIFESTE PAR LA  DOMINANCE CROISSANTE DES ESPECES TOLERANTES DANS UN PREMIER TEMPS ET OPPORTUNISTES DANS UNE PHASE ACTUELLE QUI CORRESPOND A UNE DEGRADATION ACCENTUEE. CET ASPECT EST D'AUTANT PLUS COMPLEXE QUE DES  ESPECES INVASIVES ONT ETE INTRODUITES DANS L'ECOSYSTEME. CERTAINES PRENNENT UNE PLACE SECONDAIRE ET NE MODIFIENT PAS LES EQUILIBRES AU SEIN DES PEUPLEMENTS. D'AUTRES, DOTEES DE CARACTERE OPPORTUNISTE QUANT A L'UTILISATION DES RESSOURCES, IMPOSENT DE NOUVELLES CONTRAINTES A L'ECOSYSTEME ET PEUVENT MEME EXCLURE CERTAINES ESPECES INDIGENES.","BibLvlCode":"M","StandardTitle":"Variabilité temporelle des peuplements macrobenthiques de la partie orientale du golfe du Morbihan (Bretagne) = Temporal variability of the macrobenthic communities in the Eastern part of the Gulf of Morbihan (Brittany)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 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