Maerl (calcified algae)

Maerl consists of red, calcified algae that form extensive, hardened deposits on the seabed. These algae build up over time, creating a valuable habitat for marine life such as fish and invertebrates. Maerl beds are important for maintaining healthy coastal ecosystems, acting as natural filters and providing breeding grounds. The calcification process involves algae secreting calcium carbonate, which makes their structure rigid. These deposits grow slowly and are sensitive to environmental changes, making them ecologically significant and vulnerable to activities like trawling and pollution. Overall, maerl plays a crucial role in supporting marine biodiversity and maintaining balanced ocean environments.