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Seaweed is lifted out of the top of an algae scrubber/cultivator, to be discarded or used as food, fertilizer, or skin care. Alginates are used in industrial products such as paper coatings, adhesives, dyes, gels, explosives and in processes such as paper sizing, textile printing, hydro-mulching and drilling.
Algae are prominent in bodies of water, common in terrestrial environments, and are found in unusual environments, such as on snow and ice. Seaweeds grow mostly in shallow marine waters, under 100 m (330 ft) deep; however, some such as Navicula pennata have been recorded to a depth of 360 m (1,180 ft). [84]
Brown algae include a number of edible seaweeds. All brown algae contain alginic acid (alginate) in their cell walls, which is extracted commercially and used as an industrial thickening agent in food and for other uses. [54] One of these products is used in lithium-ion batteries. [55] Alginic acid is used as a stable component of a battery anode.
A biologist holds clumps of dulse seaweed grown by Cascadia Seaweed in British Columbia, Canada. The company is cultivating the algae for use as a feed additive and biostimulant in agriculture ...
The benefits of seaweed and algae can also be seen in body products. “The St. Ives Sea Salt & Pacific Kelp Exfoliating Body Wash is a great plant based, hydrating wash particular for the winter ...
Red algae, a (disputed) phylum contains about 7,000 recognised species, [50] mostly multicellular and including many notable seaweeds. [50] [51] Brown algae form a class containing about 2,000 recognised species, [52] mostly multicellular and including many seaweeds such as kelp. Unlike higher plants, algae lack roots, stems, or leaves.
Ascophyllum nodosum is an autotroph, meaning that it makes its own food by photosynthesis, like other plants and algae. The air bladders on A. nodosum serve as a flotation device, which allows sunlight to reach the plant better, aiding photosynthesis. [6] Epiphytic red algae on knotted wrack at Roscoff, France
Edible seaweed, or sea vegetables, are seaweeds that can be eaten and used for culinary purposes. [1] They typically contain high amounts of fiber . [ 2 ] [ 3 ] They may belong to one of several groups of multicellular algae : the red algae , green algae , and brown algae . [ 2 ]