{"id":5153,"date":"2022-09-28T13:57:55","date_gmt":"2022-09-28T23:57:55","guid":{"rendered":"https:\/\/recherche.upf.pf\/?post_type=projet&p=5153"},"modified":"2024-09-19T17:00:11","modified_gmt":"2024-09-20T03:00:11","slug":"5153","status":"publish","type":"projet","link":"https:\/\/recherche.upf.pf\/ty\/projet\/5153\/","title":{"rendered":"Surveillance Environnementale des Atolls Coralliens"},"content":{"rendered":"

D\u00e9sol\u00e9, ce contenu est uniquement disponible en Fran\u00e7ais<\/a>.<\/p>

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Les atolls coralliens polyn\u00e9siens… <\/h1>\n\n\n\n
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… constituent un patrimoine fragile et unique qui contribue \u00e0 l\u2019image et \u00e0 l\u2019attractivit\u00e9 touristique de la Polyn\u00e9sie, mais aussi \u00e0 une certaine activit\u00e9 \u00e9conomique.<\/p>\n\n\n\n

Bien que relativement pr\u00e9serv\u00e9s en apparence, ils subissent l\u2019impact des activit\u00e9s anthropiques ainsi que les cons\u00e9quences pr\u00e9visibles du r\u00e9chauffement global. Leur surveillance environnementale devient n\u00e9cessaire pour organiser et optimiser leur protection.<\/p>\n<\/div>\n\n\n\n

<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n

<\/p>\n\n\n\n

Nous proposons de mettre au point une chaine de traitements g\u00e9omatiques pour cartographier le milieu naturel terrestre des atolls<\/strong>, en se basant sur les donn\u00e9es de t\u00e9l\u00e9d\u00e9tection et les techniques de traitement d\u2019images les plus r\u00e9centes et les plus pr\u00e9cises.<\/p>\n\n\n\n

Le site d\u2019\u00e9tude pilote est l\u2019atoll de Tetiaroa, sur lequel nous avons mis en place une banque de donn\u00e9es cartographique unique en Polyn\u00e9sie, et qui contient d\u00e9j\u00e0 les donn\u00e9es n\u00e9cessaires.<\/p>\n\n\n

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Capteurs optiques disponibles : R\u00e9solution vs nombre de bandes<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n

Un premier protocole de surveillance de l\u2019environnement terrestre des atolls coralliens transposable aux Tuamotu<\/strong>, permettra la cartographie du trait de c\u00f4te ainsi que du couvert v\u00e9g\u00e9tal \u00e0 partir de donn\u00e9es disponibles, d’un co\u00fbt raisonnable, et des techniques simples et \u00e9prouv\u00e9es. <\/p>\n\n\n

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Coupe sch\u00e9matique de la v\u00e9g\u00e9tation de Tiaraunu<\/em><\/a>
(P. Tuheiava ; image : \u00a9 Soci\u00e9t\u00e9 des Oc\u00e9anistes, 1972)<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n

Sa mise au point produira plusieurs cartographies r\u00e9f\u00e9rences pour l\u2019\u00e9valuation de l\u2019impact de la d\u00e9ratisation sur l\u2019environnement de Tetiaroa<\/a> (2022). <\/p>\n\n\n\n

Ce protocole pourrait \u00eatre test\u00e9 et valid\u00e9 sur l\u2019atoll de Taiaro (r\u00e9serve de biosph\u00e8re de Fakarava).<\/p>\n\n\n\n

Il sera ensuite \u00e9tendu pour tirer tout le potentiel de la donn\u00e9e lidar et produire la premi\u00e8re cartographie multi-strate du couvert v\u00e9g\u00e9tal d\u2019un atoll corallien<\/strong> prenant en compte tous les \u00e9tages de v\u00e9g\u00e9tation.<\/p>\n\n\n\n

\"\"<\/td>\"\"<\/td><\/tr><\/tbody><\/table>
stratification lidar de la v\u00e9g\u00e9tation<\/figcaption><\/figure>\n\n\n\n

Un \u00e9tudiant en Th\u00e8se: Tobias Fischer a \u00e9t\u00e9 recrut\u00e9 en 2022 pour conduire ces travaux, il est encadr\u00e9 par le Dr. Beno\u00eet Stoll<\/p>\n\n\n\n

<\/p>","protected":false},"author":51,"featured_media":5410,"template":"","coauthors":[405,422],"class_list":["post-5153","projet","type-projet","status-publish","has-post-thumbnail","hentry","entry"],"acf":[],"yoast_head":"\nSurveillance Environnementale des Atolls Coralliens • Recherche UPF<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/recherche.upf.pf\/ty\/projet\/5153\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Surveillance Environnementale des Atolls Coralliens • Recherche UPF\" \/>\n<meta property=\"og:description\" content=\"D\u00e9sol\u00e9, ce contenu est uniquement disponible en Fran\u00e7ais. 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