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The singular alga is the Latin word for 'seaweed' and retains that meaning in English. [13] The etymology is obscure. Although some speculate that it is related to Latin algēre, 'be cold', [14] no reason is known to associate seaweed with temperature. A more likely source is alliga, 'binding, entwining'. [15]
A variety of microscopic unicellular and colonial freshwater algae. Algae (UK: / ˈælɡiː / AL-ghee, US: / ˈældʒiː / AL-jee; sg.: alga / ˈælɡə / AL-gə) are any of a large and diverse group of photosynthetic, eukaryotic organisms. The name is an informal term for a polyphyletic grouping that includes species from multiple distinct clades.
t. e. Phycology (from Ancient Greek φῦκος (phûkos) 'seaweed' and -λογία (-logía) 'study of') is the scientific study of algae. Also known as algology, phycology is a branch of life science. Algae are important as primary producers in aquatic ecosystems. Most algae are eukaryotic, photosynthetic organisms that live in a wet environment.
Green algae are often classified with their embryophyte descendants in the green plant clade Viridiplantae (or Chlorobionta). Viridiplantae, together with red algae and glaucophyte algae, form the supergroup Primoplantae, also known as Archaeplastida or Plantae sensu lato. The ancestral green alga was a unicellular flagellate.
A very large algae bloom in Lake Erie, North America, which can be seen from space. An algal bloom or algae bloom is a rapid increase or accumulation in the population of algae in freshwater or marine water systems. It is often recognized by the discoloration in the water from the algae's pigments. [1] The term algae encompasses many types of ...
Cyanobacteria are ubiquitous in marine environments and play important roles as primary producers. They are part of the marine phytoplankton, which currently contributes almost half of the Earth's total primary production. [33] About 25% of the global marine primary production is contributed by cyanobacteria.
Dulse is one of many edible algae. Algaculture may become an important part of a healthy and sustainable food system [9]. Several species of algae are raised for food. While algae have qualities of a sustainable food source, "producing highly digestible proteins, lipids, and carbohydrates, and are rich in essential fatty acids, vitamins, and minerals" and e.g. having a high protein ...
Cyanobacteria (blue-green algae) bloom on Lake Erie (United States) in 2009. These kinds of algae can cause harmful algal bloom. A harmful algal bloom (HAB), or excessive algae growth, is an algal bloom that causes negative impacts to other organisms by production of natural algae-produced toxins, water deoxygenation, mechanical damage to other organisms, or by other means.