Coastal Marshes

Marshes, Coastal

 

(Russian marshi; from the German Marsch), a low-lying zone of the seacoast that is flooded during the greatest high tides or during surges of seawater. They are usually composed of silt or sand-silt deposits on which humus-rich soils form. They ordinarily stretch in a band (generally not more than 30 km wide) that frames the tidal marshes, which, unlike coastal marshes, are subjected to the regular influence of high tide and ebb tide. They are sometimes below sea level, being separated from the sea by a strip of dunes. Coastal marshes are typical of the coast of the North Sea and are found in the Netherlands, Federal Republic of Germany, Great Britain, Denmark, and France, as well as in the eastern and southern United States. In the USSR the laida, which are common along the seas of the Arctic Ocean, are analogues of coastal marshes. In their natural state they are usually covered by highly productive meadows, which are often used for agriculture.

References in periodicals archive ?
Since the end of the Second World War, the dash for ever more intensive and chemically-dependent production has gone in tandem with the loss of carbon from the soils, peat bogs and coastal marshes, and the loss of habitats to support our biodiversity.
Also vulnerable are Louisiana's famed coastal marshes, already hammered by development and flood control measures that prevent natural coastal shoreline replenishment.
Rising water and sinking land are combining to wash away the fragile and already-threatened coastal marshes from New Jersey south to North Carolina.
COASTAL marshes could begin to vanish in little over 20 years because of rising sea levels, scientists have warned.
Adyam area is known to have sedimentary layers, most of which are shallow seabed deposits or coastal marshes and lagoons.
Avocets became extinct in Britain as a breeding species before 1850, but returned during the Second World War when the East Anglian coastal marshes were deliberately flooded.
Louisiana's coastal marshes are experiencing the highest rate of wetland loss in the US [1] mainly due to sea level rise and dynamic geomorphology, but also due to natural and human-induced disasters [2, 3].
Plastic litter can smother marine life, dramatically reducing the numbers of organisms in coastal marshes, and compromising the valuable ecosystem services they provide.
Wild rice is an annual aquatic grass that grows in the shallow waters of lakes, bayous, rivers, and coastal marshes. The seeds are safely tucked under the sediment during the winter months and begin to sprout in the springtime when the ice melts and the water warms.
Over the years, oil and gas companies have sliced and diced Louisiana's forests, coastal marshes and mangrove swamps with more than 10,000 miles of canals.

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