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Dieren en planten

Emerald damselfly   Ciona intestinalis   Algae and seaweed   Green seaweed   Brown seaweed   Lichens on rocky coasts   Phytoplankton   Plankton calendar   

Water en land

Rays   Sea dikes (biotope)   

Mens en Milieu

Lichens on the foot of a sea dike, Ecomare

Lichens on rocky coasts

Just like algae and barnacles, certain species of lichens form zones on the sea dikes. Algae which grow on dikes are the sea plants that grow the highest up. The lichens come from land and those on the dike grow the lowest down. You often see horizontal strokes on stony dikes: yellow, orange, black (from the lichen) and green (from the algae).