tidal marsh

ecology

Also known as: maritime salt marsh

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Last updated

July 21, 2026

Quick Summary

A tidal marsh is a wetland ecosystem regularly flooded by the rising and falling of tides. These marshes are characterized by poorly drained mineral soils and are dominated by grasses, sedges, and rushes, distinguishing them from swamps which are dominated by trees.12

Tidal freshwater marshes are found in river systems near the coast, experiencing tidal action but without significant salinity. These areas are crucial habitats, supporting a unique array of plant and animal life adapted to fluctuating water levels and salinity. Salt marshes, in contrast, are flooded by salt or brackish water and are common along low seacoasts and in estuaries.34

These productive ecosystems play a vital role in coastal protection and biodiversity, though they are vulnerable to human disturbances and the impacts of climate change, such as rising sea levels.5

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land reclamation
Reclamation of coastal areas
Where offshore lands or tidal marshes are covered by shallow water and additional land is critically needed, the land can be reclaimed by construction of dikes roughly parallel to the shoreline, followed by drainage of the area between the dikes and the natural coastline. Where a sediment-laden stream can…
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Where offshore lands or tidal marshes are covered by shallow water and additional land is critically needed, the land can be reclaimed by construction of dikes roughly parallel to the shoreline, followed by drainage of the area between the dikes and the natural coastline. Where a sediment-laden stream can…
Read More