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            <title xml:lang="en">Method for classifying and mapping Blue Carbon ecosystems for carbon assessment : the case study of the La Rochelle urban area</title>
            <title xml:lang="fr">Méthode de classification et de cartographie des écosystèmes de carbone bleu pour la réalisation d'un bilan carbone : le cas d'étude de l'agglomération de La Rochelle</title>
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                <title xml:lang="en">Method for classifying and mapping Blue Carbon ecosystems for carbon assessment : the case study of the La Rochelle urban area</title>
                <title xml:lang="fr">Méthode de classification et de cartographie des écosystèmes de carbone bleu pour la réalisation d'un bilan carbone : le cas d'étude de l'agglomération de La Rochelle</title>
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                <term xml:lang="fr">Base de données géographique</term>
                <term xml:lang="fr">Carbone bleu</term>
                <term xml:lang="fr">Marais littoraux et rétro-littoraux</term>
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              <p>In the context of global climate change, France has committed to achieving carbon neutrality. The territory of La Rochelle, through the La Rochelle Territoire Zéro Carbone project, aims to reach this goal by enhancing its "blue carbon" ecosystems. This study proposes a typology of La Rochelle's blue carbon ecosystems along a land-sea continuum, establishing an unprecedented classification of seven types of environments that could act as carbon sinks : dyked freshwater, brackish, and salt marshes, as well as salt meadows, mudflats, seagrass beds, and the ocean. A second level of classification was introduced for backshore marshes, attributing the concept of blue carbon only to aquatic surfaces. This distinction between water surfaces and emerged surfaces raises questions about the separation between blue carbon and green carbon. Additionally, a geographic database was created, accompanied by maps to locate these environments and assess their surface area, assisting managers and local authorities in their mission to preserve and evaluate the carbon capture and sequestration potential. The study's limitations include the subjectivity of the maritime perimeter assigned to the territory and the categorization of ecosystems between blue carbon and green carbon. This innovative typology, supported by a cartographic framework, provides a better understanding of carbon sinks in the territory and helps to guide public policies toward achieving carbon neutrality.</p>
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              <p>Dans un contexte de changement climatique global, la France s'est engagée vers la neutralité carbone. Le territoire de La Rochelle, à travers le projet La Rochelle Territoire Zéro Carbone, vise à atteindre cet objectif en valorisant ses écosystèmes de « carbone bleu ». Cette étude propose une typologie des écosystèmes de carbone bleu rochelais présents le long d'un continuum terre-mer, établissant une classification inédite de sept types de milieux susceptibles d'être des puits de carbone : marais doux, saumâtres et salés ainsi que prés salés, vasières, herbiers et océan. Un second niveau de classification a été introduit pour les marais rétro-littoraux, attribuant la notion de carbone bleu uniquement aux surfaces aquatiques. Cette distinction entre les surfaces en eau et les surfaces émergées soulève des interrogations sur la séparation entre carbone bleu et carbone vert. De plus, une base de données géographique a été créée, accompagnée de cartographies permettant de localiser ces milieux et d'évaluer leur superficie, afin d'assister les gestionnaires et collectivités dans leur mission de préservation et d'évaluation du potentiel de captation et de séquestration du carbone. Les limites de l'étude portent sur la subjectivité du périmètre maritime assigné au territoire et sur la catégorisation des écosystèmes entre carbone bleu et carbone vert. Cette typologie innovante, soutenue par un référentiel cartographique, offre une meilleure compréhension des puits de carbone sur le territoire et contribue à orienter les politiques publiques en vue d'atteindre la neutralité carbone.</p>
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