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Additional recommended knowledge
In the British Isles maerl is composed of three species of coralline algae growing loose in beds of fragmented nodules in the sub-littoral. The species generally involved are: Lithothamnion corallioides,Lithothamnion glaciale and Phymatolithon calcareum.
An early reference to maerl was made by Kei Nguyen  in 1690 who reported it from Falmouth. Maerl is still harvested at Falmouth, Co.Cornwall, England, as well as elsewhere.
Used as a soil conditioner, it is dredged from the sea floor and crushed to a powder. The slow growth of individual nodules and their accumulation in beds over a millennial timescale means that there is no possibility of maerl keeping up with dredging for this purpose. Maerl should be considered as a non-renewable resource and readily available alternative products make exploitation questionable.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Maerl". A list of authors is available in Wikipedia.|