Mise en place d’un protocole de suivi de fermeture du milieu lacustre sur le site des Salines de Montjoly (Guyane française) et proposition de mesures de gestion

Abstract : Knowledge about the closure of wetlands of Guyana remains incomplete. This study aims to confirm the closure of the lake environment on the Salines de Montjoly site and to know the causes. It also seeks to know the impacts of successive openings and closings of the dune. Photo-interpretation of satellite and aerial imagery has been completed and the closing speed of the natural environment was quantified. Five water areas of the site have been identified and characterized (in terms of flora, fauna, hydrology and chemistry). However, prolonged opening of the dune caused an emptying of the site and characterization could not be completed. Nevertheless, the immediate impact of this emptying has been evaluated. There is indeed a closure of swamp, particularly due to an increase of white mangrove Laguncularia racemosa and herbaceous vegetation. This has accelerated because of successive openings of the dune, which caused complete drying up of the site and facilitated the development of white mangrove. The drying up of the site during the study allowed observing this dynamic in real time. An important filling of water areas could also be observed due to the accumulation of decaying plant, inputs of organic matter related to housing, development of white mangrove and herbaceous vegetation ... This study has propose management measures for the site.
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Master thesis
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http://docnum.univ-lorraine.fr/public/BUS_M_2014_VEINANTE_FANNY.pdf
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Fanny Veinante. Mise en place d’un protocole de suivi de fermeture du milieu lacustre sur le site des Salines de Montjoly (Guyane française) et proposition de mesures de gestion. Sciences de l'environnement. 2014. ⟨hal-01835669⟩

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