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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
Kelps are large brown algae or seaweeds that make up the order Laminariales.There are about 30 different genera. [3] Despite its appearance and use of photosynthesis in chloroplasts, kelp is technically not a plant but a stramenopile (a group containing many protists).
Like most brown algae, Postelsia goes through alternation of generations, and is an annual species. The diploid sporophyte produces, through meiosis , haploid spores , which drip down through the grooves in the blades onto the substrate, which may be mussels , barnacles , or bare rock.
Macrocystis is a monospecific genus [3] of kelp (large brown algae) with all species now synonymous with Macrocystis pyrifera. It is commonly known as giant kelp or bladder kelp. This genus contains the largest of all the Phaeophyceae or brown algae. Macrocystis has pneumatocysts at the base of its blades.
Generally, it is one of several groups of multicellular algae; red, green and brown. [7] They lack one common multicellular ancestor, forming a polyphyletic group. In addition, blue-green algae (Cyanobacteria) are occasionally considered in seaweed literature. [8]
The blooms this week are likely a result of recent rainy weather that washed more polluted runoff into bodies of water, as well as hot, still weather that primed conditions for the algae to grow ...
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.
A bout of toxic algae, ... low river flow and nutrient pollution — especially phosphorus — help algae "grow out of control," he said. ... "The color of the algae may also appear red or brown."