Marine phytoplankton is made up of small plants, mostly microscopic in size and unicellular. Two orders of algae commonly predominate in the larger, net phytoplankton: Diatoms (Bacillariophyceae) and Dinoflagellates (Dinophyceae). The phytoplankton often also includes a numerous and diverse collection of extremely small, motile plants collectively termed microflagellates.
Floating masses of large algae are found living and growing in some areas, notably the Sargassum weed of the Sargasso area of the North Atlantic. Within very sheltered sea lochs on the Scottish coast, in areas where the salinity is reduced, there occurs a floating and proliferating form of the common littoral fucoid seaweed, Ascophyllum nodosum. These are not generally regarded as phytoplankton because they derive from the fragmentation of benthic plants growing on the sea bottom in shallow water.
Many of the phytoplankton species of the North Atlantic are described in detail in volumes by Lebour (1925, 1930) and Hendey (1964). There are many excellent photographs in Drebes (1974) although the text is in German. More recent, but less detailed accounts can be found in the student texts detailed at the end of this chapter.
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Lets start by identifying what exactly certain boats are. Sometimes the terminology can get lost on beginners, so well look at some of the most common boats and what theyre called. These boats are exactly what the name implies. They are meant to be used for fishing. Most fishing boats are powered by outboard motors, and many also have a trolling motor mounted on the bow. Bass boats can be made of aluminium or fibreglass.