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The Biogeography of Tropical Phytoplankton Species in the Pacific Ocean
Authors:Halina J Semina  Sophia S Levashova
Abstract:The ranges of 10 tropical Pacific phytoplankton species are shown in the maps. Five types of these ranges are discussed. Except for broadly tropical species some species with much narrower ranges are characterized. The bases of ranges and the expatriation areas are given. The bases of ranges of all the species studied fall into similar temperature and salinity limits. Most of the species inhabit a wide range of nutrients concentration, but Climacodium frauenfeldianum and Hemiaulus hauckii are only found at low phosphate and silicate concentrations. These peculiarities determine the geography of ranges of these two species. Among the species investigated only Ceratium gravidum belongs to the shade flora.
Keywords:phytoplankton geography  ecology  ranges
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