Why is Rhodophyta red?

The red “algae” Red algae are red because of the presence of the pigment phycoerythrin; this pigment reflects red light and absorbs blue light. Some rhodophytes have very little phycoerythrin, and may appear green or bluish from the chlorophyll and other pigments present in them.

What do humans use red algae for?

Red algae form an important part of the ecosystem and are consumed by various organisms such as crustaceans, fish, worms and even humans. Red algae are also used to produce agar that is used as a food additive. They are rich in calcium and also used in vitamin supplements.

What does Laminaria digitata do for skin?

Rich in alginates, mannitol and amino acids, Laminaria digitata has powerful properties to moisturize*, remineralize, protect and nourish the skin. *Moisturizes the upper layers of the epidermis. Very rich in iodine, this seaweed promotes slimming and has antiseptic properties.

Which is the best description of Corallina officinalis?

This variability has resulted in numerous species descriptions that are probably synonymous with Corallina officinalis (Irvine & Chamberlain 1994). Bamber, R.N. & Irving, P.W., 1993.

How tall do pale Corallina officinalis fronds get?

Pale Corallina officinalis specimen. Distribution data supplied by the Ocean Biogeographic Information System (OBIS). To interrogate UK data visit the NBN Atlas. Corallina officinalis consists of calcareous, branching, segmented fronds, usually erect, up to 12 cm high but often much shorter.

Are there any coralline species in the British Isles?

Two species of the geniculate (jointed) coralline genus Corallina are currently recognized in the British Isles: Corallina officinalis and the semi-cryptic species C. caespitosa ( Walker et al., 2009; Williamson et al., 2015 ).

How many genera are there in the Corallinaceae?

Only one extant family, the Corallinaceae, is assigned to the Corallinales, though the extinct family Solenoporaceae is considered a sister taxon. The corallinaceans are divided into seven subfamilies which contain more than 40 genera. Four of these subfamilies contain nonarticulated genera.