mellomfjæresonen

Mellomfjæresonen is a Norwegian term referring to a specific geological and biological zone found in certain coastal and sub-coastal environments. It describes the area situated between the high tide line and the low tide line, encompassing the intertidal zone. This region is characterized by its dynamic nature, subject to regular inundation by seawater and subsequent exposure to air.

The physical environment of the mellomfjæresonen varies significantly depending on factors such as substrate type (rocky shores, sandy beaches, mudflats), wave exposure, and tidal range. In rocky areas, barnacles, mussels, and various algae species often dominate. Sandy beaches might support burrowing invertebrates like clams and amphipods, while mudflats can host a rich diversity of worms and small crustaceans.

Ecologically, the mellomfjæresonen is a highly productive and specialized habitat. Organisms living here must be adapted to survive periods of both submersion and emersion, tolerating changes in salinity, temperature, and oxygen levels. This zone acts as a crucial feeding ground for many bird species, including waders and seabirds, which exploit the abundant food resources available during low tide. It also plays a role in nutrient cycling and coastal defense.