Le 16 juin 2024
Retour sur un itinéraire déjà parcouru en 2017 le long de la côte la plus sauvage de l’étang de Berre entre les plages de Massane à Saint-Mitre les Remparts et celle de Figuerolles à Martigues, environ 5 km d’un littoral préservé de l’urbanisation et de l’industrialisation par les escarpements du versant est de la colline de Caderaou. La pinède y a d’ailleurs parfois cédé la place à des badlands là où l’érosion a mis à nu les pentes les plus raides, donnant aux lieux des airs de terres noires… ou plutôt violettes du plus bel effet.
Sous la surface de l’étang l’amélioration de la qualité des eaux se confirme avec une vie marine plus riche et diversifiée que 7 ans plus tôt, particulièrement au sud vers Figuerolles où des poches en extension de zostères abritent nombre d’espèces, alevins par centaines mais aussi crustacés, gastéropodes et syngnathes bien camouflés entre les tiges, sans compter les anémones, rapanes, gobies et blennies qui évoluent à côté.
A noter des températures bien fraîches ce jour, pas plus de 25°C au-dessus de l’eau et 22°C dans l’eau, des conditions de début mai de plus en plus rares pour une mi-juin.
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les "robines" violettes sous Caderaou
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une histoire de rapanes : un rapane, l'accouplement et la ponte !
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les cténophores luminescents
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à l'extrémité nord de la plage de Figuerolles, près des herbiers
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dans les zostères, vastes et et bonne santé...
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... des anénomes aux bouches aux motifs psychédéliques
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... des gobies noirs
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... et de nombreux syngnathes (qui ne doivent compter que sur leur camouflage en herbes pour échapper à leurs prédateurs !), mais pas de son cousin l'hippocampe vu ce jour
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