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Its fast growth and size provide an important habitat not only for the fish and invertebrates that reside in kelp forests, but also for species that use kelp forests as foraging grounds. [15] In bull kelp forests, kelp crabs are important grazers that control the ecosystem by feeding on large canopy kelps such as Nereocystis .
Along with D. poha, blades of D. antarctica are used to make traditional pōhā bags, which are used to carry and store food and fresh water, to propagate live shellfish, and to make clothing and equipment for sports. [40] [41] [42] Pōhā are especially associated with Ngāi Tahu and are often used to carry and store muttonbird (tītī) chicks.
Alginate, a kelp-derived carbohydrate, is used to thicken products such as ice cream, jelly, salad dressing, and toothpaste, as well as an ingredient in exotic dog food and in manufactured goods. [ 44 ] [ 45 ] [ 46 ] Alginate powder is also used frequently in general dentistry and orthodontics for making impressions of the upper and lower ...
Bull kelp is a common name for the brown alga Nereocystis luetkeana which is a true kelp in the family Laminariaceae. Species in the genus Durvillaea are also sometimes called "bull kelp", but this is just a shortening of the common name southern bull kelp .
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.
D. potatorum was used extensively for clothing and tools by Aboriginal Tasmanians, with uses including material for shoes and bags to transport freshwater and food. [ 61 ] [ 62 ] Currently, D. potatorum is collected as beach wrack from King Island , where it is then dried as chips and sent to Scotland for phycocolloid extraction.
Hydrocolloids have attained commercial significance, especially in food production as food additives. [5] The food industry exploits the gelling, water-retention, emulsifying and other physical properties of these hydrocolloids. [6] Most edible seaweeds are marine algae whereas most freshwater algae are toxic.
Blades from southern bull kelp (rimurapa in Māori) [1] [2] [3] species such as Durvillaea antarctica and D. poha (named after the pōhā) [4] [5] were used to construct the bags. [1] The kelp blades have a 'honeycomb' structure, [6] [7] which allows them to be split open, hollowed out (pōhā hau) and inflated into containers. [1] [2] Inflated ...