Algas calcareas

Algas calcareas or calcareous algae are a type of algae that are characterized by their ability to produce calcium carbonate (CaCO3) as a hard shell or skeleton. This group of algae is diverse and includes members from different taxonomic groups, including the red algae (Rhodophyta), green algae (Chlorophyta), and brown algae (Phaeophyta).

Taxonomy

The term "calcareous algae" is not a taxonomic group, but rather a functional or ecological group. It includes members from different taxonomic groups, including the red algae (Rhodophyta), green algae (Chlorophyta), and brown algae (Phaeophyta). The most well-known and studied group of calcareous algae are the coralline algae, which are a subgroup of the red algae.

Morphology

Calcareous algae can have a variety of morphologies, from microscopic single-celled organisms to large, complex multicellular structures. The defining characteristic of these algae is their ability to produce calcium carbonate (CaCO3) as a hard shell or skeleton. This can take the form of individual plates or scales, a continuous layer covering the entire organism, or a complex three-dimensional structure.

Ecology

Calcareous algae play important roles in many marine ecosystems, particularly coral reefs. They contribute to the structural complexity of the reef and provide habitat for many other organisms. In addition, their calcium carbonate skeletons contribute to the overall productivity and carbon sequestration capacity of these ecosystems.

Economic Importance

Calcareous algae have economic importance as well. They are harvested for use in a variety of products, including aquarium substrates, soil conditioners, and nutritional supplements. In addition, they are being investigated for their potential in carbon sequestration and climate change mitigation efforts.

See Also

• Algae
• Coral reef
• Carbon sequestration

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