Les algues Les algues laminaires flottante marine palnt forest bed l'archipel Haida Gwaii, en Colombie-Britannique, British Columbia, canada.

• Contributeur: Michael DeFreitas North America / Alamy Banque D'Images
• ID de l’image: E47Y3E
• Taille du fichier: 38,5 MB (1,8 MB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 4500 x 2989 px | 38,1 x 25,3 cm | 15 x 10 inches | 300dpi
• Date de la prise de vue: 13 août 2011
• Lieu: Haida Gwaii, British Columbia, canada

Informations supplémentaires

Kelps are large seaweeds (algae) belonging to the brown algae (Phaeophyceae) in the order Laminariales. There are about 30 different genera.[citation needed] Kelp grows in underwater "forests" (kelp forests) in shallow oceans, and is thought to have appeared in the Miocene, 23 to 5 million years ago. The organisms require nutrient-rich water with temperatures between 6 and 14 °C (43 and 57 °F). They are known for their high growth rate — the genera Macrocystis and Nereocystis can grow as fast as half a metre a day, ultimately reaching 30 to 80 metres (100 to 260 ft).

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