Red algae
Red Algae
Red algae (pronunciation: /rɛd ˈældʒi/), also known as Rhodophyta (pronunciation: /roʊˈdɒfɪtə/), is a large group of algae that are predominantly marine and are characterized by their red coloration. The term "red algae" is derived from the Greek words "rhodos" meaning "rose" and "phyton" meaning "plant".
Classification
Red algae belong to the phylum Rhodophyta, which is one of the oldest groups of eukaryotic algae. The Rhodophyta also comprises one of the largest phyla of algae, with over 6,000 species currently recognized.
Characteristics
Red algae are known for their distinctive red color, which is due to the presence of the pigment phycoerythrin. This pigment reflects red light and absorbs blue light, which allows red algae to photosynthesize and live at greater depths than most other photosynthetic organisms.
Distribution and Habitat
Red algae are predominantly marine, with only a few freshwater species known. They are found in all oceans and are particularly abundant in the warmer waters of the tropics. Some species of red algae are also found in colder regions and can survive in extreme conditions such as the intertidal zone.
Uses
Red algae have a variety of uses. They are a source of agar, a gelatinous substance used in laboratories and in cooking. Some species of red algae are also harvested for food, particularly in Asia, where they are used in soups, salads, and sushi.
Related Terms
External links
- Medical encyclopedia article on Red algae
- Wikipedia's article - Red algae
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