{"id":3529,"date":"2015-10-08T19:31:36","date_gmt":"2015-10-08T17:31:36","guid":{"rendered":"http:\/\/turismovallesanlorenzo.com\/fr\/mare\/posidonia\/"},"modified":"2016-07-20T10:02:19","modified_gmt":"2016-07-20T08:02:19","slug":"posidonie","status":"publish","type":"page","link":"https:\/\/turismovallesanlorenzo.com\/fr\/mer\/posidonie\/","title":{"rendered":"Posidonia oceanica"},"content":{"rendered":"

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Les jardins sous marins de la Vall\u00e9e<\/b><\/p>\n

[\/et_pb_slide] [\/et_pb_fullwidth_slider][\/et_pb_section][et_pb_section admin_label=\u00a0\u00bbSezione\u00a0\u00bb fullwidth=\u00a0\u00bboff\u00a0\u00bb specialty=\u00a0\u00bbon\u00a0\u00bb][et_pb_column type=\u00a0\u00bb1_3″][et_pb_sidebar admin_label=\u00a0\u00bbBarra Laterale\u00a0\u00bb orientation=\u00a0\u00bbleft\u00a0\u00bb area=\u00a0\u00bbet_pb_widget_area_3″ background_layout=\u00a0\u00bblight\u00a0\u00bb remove_border=\u00a0\u00bboff\u00a0\u00bb] [\/et_pb_sidebar][\/et_pb_column][et_pb_column type=\u00a0\u00bb2_3″ specialty_columns=\u00a0\u00bb2″][et_pb_row_inner admin_label=\u00a0\u00bbRiga\u00a0\u00bb][et_pb_column_inner type=\u00a0\u00bb4_4″ saved_specialty_column_type=\u00a0\u00bb2_3″][et_pb_text admin_label=\u00a0\u00bbTesto\u00a0\u00bb background_layout=\u00a0\u00bblight\u00a0\u00bb text_orientation=\u00a0\u00bbleft\u00a0\u00bb use_border_color=\u00a0\u00bboff\u00a0\u00bb border_color=\u00a0\u00bb#ffffff\u00a0\u00bb border_style=\u00a0\u00bbsolid\u00a0\u00bb]<\/p>\n

Les jardins sous marins de la Vall\u00e9e<\/b><\/p>\n

Il y a diff\u00e9rentes th\u00e9ories sur l\u2019arriv\u00e9e des Phan\u00e9rogames dans la mer (appell\u00e9es Magnoliophyte selon la terminologie plus r\u00e9cente). Certains pensent qu’il s’agissait de plantes alotoll\u00e9rante (c’est-\u00e0-dire, des plantes adapt\u00e9es \u00e0 des phases p\u00e9riodiques d\u2019\u00e9mersion et d’immersion dans l\u2019eau de mer) tandis que d\u2019autres pensent qu\u2019il s’agissait de plantes d\u2019eau douce. Le fait est qu\u2019il y a environ 120 millions d\u2019ann\u00e9es, les Phan\u00e9rogames ont abandonn\u00e9 leur habitat originaire pour s\u2019adapter parfaitement au milieu marin.<\/p>\n

Dans la M\u00e9diterran\u00e9e il y a cinq esp\u00e8ces de plantes aquatiques qui font partie de la famille des Magnoliophytes: les plus communes\u00a0\u00a0<\/span>Posidonia oceanica<\/i>\u00a0<\/span>et\u00a0<\/span>Cymodocea nodosa<\/i>, les plus rares\u00a0\u00a0 <\/span>Zostera marina<\/i>\u00a0<\/span>et Nanozostera noltii<\/i>, ainsi que <\/span> l\u2019esp\u00e8ce allochtone (c’est-\u00e0-dire une esp\u00e8ce non typique du lieu)\u00a0<\/span>Halophila stipulacea<\/i>. Dans cette page on se limitera \u00e0 parler en thermes g\u00e9n\u00e9riques de la\u00a0<\/span>Posidonia oceanica<\/i>\u00a0parce que c\u2019est la plus connue et parce qu’elle est pr\u00e9sente dans la cartographie du SIC <\/span>\u201cFonds marins de Porto Maurizio, San Lorenzo al Mare, Torre dei Marmi\u201d.<\/p>\n\n\t\t