{"id":1292,"date":"2015-05-27T13:32:02","date_gmt":"2015-05-27T12:32:02","guid":{"rendered":"http:\/\/marion-dev.valars.com\/andromede\/?p=1292"},"modified":"2015-05-27T13:32:02","modified_gmt":"2015-05-27T12:32:02","slug":"publication-impact-de-85-ans-de-developpement-cotier-sur-la-limite-superieure-des-herbiers-de-posidonie","status":"publish","type":"post","link":"https:\/\/www.andromede-ocean.com\/english\/blog\/2015\/05\/27\/publication-impact-de-85-ans-de-developpement-cotier-sur-la-limite-superieure-des-herbiers-de-posidonie\/","title":{"rendered":"Publication : Impact de 85 ans de d\u00e9veloppement cotier sur la limite sup\u00e9rieure des herbiers de posidonie"},"content":{"rendered":"

\t\t\t\t\"Holon<\/a><\/strong>
\n 
\nThe impact of 85 years of coastal development on shallow seagrass beds (Posidonia oceanica L. (Delile)) in South Eastern France: A slow<\/strong>
\nbut steady loss without recovery<\/strong>
\nauteurs : F. Holon a, P. Boissery b, A. Guilbert a, E. Freschet a, J. Deter a, c,
\npubli\u00e9 dans Estuarine Coastal Shelf Science<\/strong>
\nR\u00e9sum\u00e9 : Shallow Posidonia oceanica beds (0 to \u000115 m), the most common seagrass in the Mediterranean, were
\nmapped from aerial photographs dating from the 1920’s and from 2012 along 800 km of coastline in
\nSouth-Eastern France (Provence-Alpes-C^ote-d\u2019Azur region). Changes in P. oceanica bed spatial distribution
\n(limits and extent) during these 85 years were analyzed in terms of concordance (remaining areas),
\npositive discordance (expanding areas) or negative discordance (lost areas). Lost areas were linked with
\ndirect or indirect impacts of coastal development (artificialized coastlines (namely harbours, ports of
\nrefuge, landfills, artificial beaches, groynes and pontoons, submarine pipelines and aquatic farms) visible
\non the photographs. The comparison showed that 73% of the shallow limits have declined. Considering
\nspatial extent, remaining seagrass meadows areas accounted for the major part (85%), while lost areas
\naccounted for 13% and expanding areas for 1.1%. Lost areas were mainly linked with artificial coastlines
\nbut 44% remained with undetermined causes (invisible pressures and\/or mixed effects). The analysis of
\n96 coastal facilities creating the artificial (namely man-made) coastlines showed that the highest impact
\nover the longest distance (5 km) was caused by harbours. Only artificial beaches had such a distant
\nimpact. Pontoons were the least surrounded by lost seagrass meadows areas. These quantitative data
\noffer important information for marine conservation.\t\t<\/p>\n","protected":false},"excerpt":{"rendered":"

  The impact of 85 years of coastal development on shallow seagrass beds (Posidonia oceanica L. (Delile)) in South Eastern France: A slow but steady loss without recovery auteurs : F. Holon a, P. Boissery b, A. Guilbert a, E. Freschet a, J. Deter a, c, publi\u00e9 dans Estuarine Coastal Shelf Science R\u00e9sum\u00e9 : Shallow […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[10],"tags":[],"class_list":["post-1292","post","type-post","status-publish","format-standard","hentry","category-resultats-scientifiques"],"yoast_head":"\nPublication : Impact de 85 ans de d\u00e9veloppement cotier sur la limite sup\u00e9rieure des herbiers de posidonie - Androm\u00e8de Oc\u00e9anologie<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Publication : Impact de 85 ans de d\u00e9veloppement cotier sur la limite sup\u00e9rieure des herbiers de posidonie - Androm\u00e8de Oc\u00e9anologie\" \/>\n<meta property=\"og:description\" content=\"  The impact of 85 years of coastal development on shallow seagrass beds (Posidonia oceanica L. (Delile)) in South Eastern France: A slow but steady loss without recovery auteurs : F. Holon a, P. Boissery b, A. Guilbert a, E. Freschet a, J. Deter a, c, publi\u00e9 dans Estuarine Coastal Shelf Science R\u00e9sum\u00e9 : Shallow […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.andromede-ocean.com\/english\/blog\/2015\/05\/27\/publication-impact-de-85-ans-de-developpement-cotier-sur-la-limite-superieure-des-herbiers-de-posidonie\/\" \/>\n<meta property=\"og:site_name\" content=\"Androm\u00e8de Oc\u00e9anologie\" \/>\n<meta property=\"article:published_time\" content=\"2015-05-27T12:32:02+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/www.andromede-ocean.com\/english\/wp-content\/uploads\/sites\/2\/Holon-et-al-2015-85-years.jpg\" \/>\n<meta name=\"author\" content=\"julie Deter\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"julie Deter\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.andromede-ocean.com\/english\/blog\/2015\/05\/27\/publication-impact-de-85-ans-de-developpement-cotier-sur-la-limite-superieure-des-herbiers-de-posidonie\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.andromede-ocean.com\/english\/blog\/2015\/05\/27\/publication-impact-de-85-ans-de-developpement-cotier-sur-la-limite-superieure-des-herbiers-de-posidonie\/\"},\"author\":{\"name\":\"julie Deter\",\"@id\":\"https:\/\/www.andromede-ocean.com\/english\/#\/schema\/person\/670621606150c9eb5a0c92897263dcf6\"},\"headline\":\"Publication : Impact de 85 ans de d\u00e9veloppement cotier sur la limite sup\u00e9rieure des herbiers de posidonie\",\"datePublished\":\"2015-05-27T12:32:02+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.andromede-ocean.com\/english\/blog\/2015\/05\/27\/publication-impact-de-85-ans-de-developpement-cotier-sur-la-limite-superieure-des-herbiers-de-posidonie\/\"},\"wordCount\":270,\"image\":{\"@id\":\"https:\/\/www.andromede-ocean.com\/english\/blog\/2015\/05\/27\/publication-impact-de-85-ans-de-developpement-cotier-sur-la-limite-superieure-des-herbiers-de-posidonie\/#primaryimage\"},\"thumbnailUrl\":\"http:\/\/www.andromede-ocean.com\/english\/wp-content\/uploads\/sites\/2\/Holon-et-al-2015-85-years.jpg\",\"articleSection\":[\"Scientific results\"],\"inLanguage\":\"en-GB\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.andromede-ocean.com\/english\/blog\/2015\/05\/27\/publication-impact-de-85-ans-de-developpement-cotier-sur-la-limite-superieure-des-herbiers-de-posidonie\/\",\"url\":\"https:\/\/www.andromede-ocean.com\/english\/blog\/2015\/05\/27\/publication-impact-de-85-ans-de-developpement-cotier-sur-la-limite-superieure-des-herbiers-de-posidonie\/\",\"name\":\"Publication : Impact de 85 ans de d\u00e9veloppement cotier sur la limite sup\u00e9rieure des herbiers de posidonie - 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