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Taxonomy, species richness and biogeography of Finnish crane flies (Diptera, Tipuloidea).
(Turun yliopistoAnnales Universitatis Turkuensis A II 276, 2013-01-25)
Biodiversity is unequally spread throughout terrestrial ecosystems. The highest species richness of animals and plants is encountered around the Equator, and naturalists observe a decrease in the number of creatures with ...