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The brown algae include the largest and fastest growing of seaweeds. [6] Fronds of Macrocystis may grow as much as 50 cm (20 in) per day, and the stipes can grow 6 cm (2.4 in) in a single day. [13] Growth in most brown algae occurs at the tips of structures as a result of divisions in a single apical cell or in a row of such
Species of Fucus are recorded almost worldwide. They are dominant on the shores of the British Isles, [5] the northeastern coast of North America [6] and California. [3]In the British Isles these larger brown algae occur on sheltered shores in fairly well defined zones along the shore from high-water mark to below low water mark.
Ecklonia is a genus of kelp (brown algae) belonging to the family Lessoniaceae. The genus name of Ecklonia is in honour of Christian Friedrich Ecklon (1795–1868), who was a Danish botanical collector and apothecary. [3] The genus was circumscribed by Jens Wilken Hornemann in Kongl. Danske Vidensk. Selk. Naturvidenskab. Math. Afh.
Sargassum is a genus of brown macroalgae in the order Fucales of the Phaeophyceae class. [1] Numerous species are distributed throughout the temperate and tropical oceans of the world, where they generally inhabit shallow water and coral reefs, and the genus is widely known for its planktonic (free-floating) species.
Padina and Newhousia are the only genera in the brown algae group that is calcareous. [ 1 ] Padina species are differentiated based on the cell layer number, sporangial sori arrangement relative to hair bands and hair band presence or lack of on the lower thallus surface.
Ectocarpus is a genus of filamentous brown alga that includes a model organism for the genomics of multicellularity. [1] [2] Among possible model organisms in the brown algae, Ectocarpus was selected for the relatively small size of its mature thallus and the speed with which it completes its life cycle.
Turbinaria contains fucoxanthin which is a carotenoid pigment found in all brown algae. Its functions lie in the harvesting of light and energy transfer. [ 4 ] The genus has high levels of iron (893.7 ± 210.5 g −1 μg dry weight), [ 20 ] and has an affinity for arsenic and nickel, depending on the concentrations in the environments in which ...
Padina pavonica is a distinctive small brown alga growing to a diameter of up to 10 cm (4 in). Young fronds are thin, leafy and flat, with entire margins. Older fronds are thicker, concave, fan-shaped or funnel-shaped, with lobed margins.