calcareous algae

Calcareous algae are a type of algae that produce calcium carbonate, which is a mineral found in limestone and shells. These algae contribute to the formation of coral reefs and sedimentary rocks by building up structures that provide habitats for marine life. Common examples include coralline algae, which can be found in shallow ocean waters. Their ability to create hard, rocky surfaces helps stabilize the ecosystem and supports biodiversity. In addition, calcareous algae play a role in the carbon cycle, sequestering carbon dioxide, and influencing ocean chemistry.