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File:Algal bloom banner Inflorescence.jpg

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Français : Inflorescence planctonique. Ce sont a priori des cyanophycées (algue bleue). Dans ce cas, quelques heures (ici une quinzaine d'heure) après le début de l'épisode, les taches bleues se sont étendues.


Les traces en forme de trainées sont des traces laissées par des poissons et des canards qui circulent sur l'eau, "cassant" le biofilm.
La couleur bleue caractérise des zones d'accumulation de pigments bleus libérés par des bacéries mortes. Ici l'eau a une consistance de «soupe» sur les 5 à 10 mm, sous la surface.


Lieu : quai du Vault à Lille, non loin du centre ville (France), après une longue période pluvieuse (non caniculaire, et même sous les moyennes saisonnières, mais avec des nuits inhabituellement douces). Le canal proche (Deûle) est également couvert d’une couche de plancton vert sur de vastes surfaces (centaines de mètres carrés), mais beaucoup moins épaisse. Les échantillons dégagent une forte odeur d'algue (type spiruline).
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Source Cropped from File:Efflorescence verte 4 Cyanobacteria.JPG.
Author Original photo: Lamiot.
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Lamiot, the copyright holder of this work, hereby publishes it under the following licenses:
GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.
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Attribution: Lamiot
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Other versions This file was derived from: Efflorescence verte 4 Cyanobacteria.JPG

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current22:36, 10 May 2016Thumbnail for version as of 22:36, 10 May 20162,560 × 366 (289 KB)Mx. Granger{{Information |Description ={{fr|1=Inflorescence planctonique. Ce sont a priori des cyanophycées (algue bleue). Dans ce cas, quelques heures (ici une quinzaine d'heure) après le début de l'épisode, les taches bleues se sont étendues. <br>Les t...

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