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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
Chordariaceae is a family of brown algae. Members of this family are may be filamentous, crustose with fused cells at the base, or they may be terete and differentiated into a central medulla and an outer photosynthetic cortex. They have a sporphytic thallus usually aggregated to form a pseudo-parenchyma. [1]
Some modern authors prefer to exclude multicellular organisms from the traditional definition of a protist, restricting protists to unicellular organisms. [9] [10] This more constrained definition excludes all brown, the multicellular red and green algae, and, sometimes, slime molds (slime molds excluded when multicellularity is defined as ...
"Seaweed" lacks a formal definition, but seaweed generally lives in the ocean and is visible to the naked eye. The term refers to both flowering plants submerged in the ocean, like eelgrass, as well as larger marine algae. Generally, it is one of several groups of multicellular algae; red, green and brown. [7]
Dictyotaceae is large family of brown algae (class Phaeophyceae). [2] It is the only family in the monotypic order Dictyotales (from Greek diktyotos 'netlike'). [3] Members of this family generally prefer warmer waters than other brown algae and are prevalent in tropical and subtropical waters thanks to their many chemical defenses to ward off grazers.
Other brown algae can be found at the low-littoral such as Himanthalia, Laminaria saxatilis and Alaria esculenta. Small green and red algae and animals occur, protected under these large brown algae. [7] When washed up on beaches, kelp flies such as Coelopa pilipes feed and breed on Fucus algae.
Cryptostomata (singular: cryptostoma) are structures found in some types of brown algae. The anatomical structures are found in some species of Fucus, but not in Pelvetia canaliculata. Cryptostomata are similar to conceptacles, [16] but they are sterile cavities producing only hairs. [5] [17] They are found on the lamina of Fucus serratus ...
This is a list of the orders, families and genera in the class Phaeophyceae — the brown algae. [1] Discosporangiophycidae. Discosporangiales. Choristocarpaceae