| Checklist of Baltic Sea Phytoplankton Species : including some heterotrophic protistan groups | |
Abstract/OtherAbstract
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Baltic Sea environment proceedings, ISSN 0357-2994 ; 95, Pages: 210 p., Two previous checklists of Baltic Sea phytoplankton (Hällfors 1980 (1979) and Edler et al. 1984) were titled "preliminary". Our knowledge of the taxonomy and distribution of Baltic Sea phytoplankton has increased considerably over the last 20 years. Much of this new information has been incorporated in this new list. Data from a number of older publications overlooked by Edler et al. (1984) has also been included. As a result, the number of species included has grown considerably. Especially the inclusion of more estuarine species adapted to salinities lower than those of the open Baltic Sea has increased the number of species. The new list also contains species which mainly grow in ice but form sparse planktonic populations in the beginning of the spring bloom, and species of benthic or littoral origin (whether epiphytic, epilitic, epipsammic, epipelic, or rarely epizooic), that are occasionally found in the plankton. The benthic and littoral species are coded with an "l" in the checklist. Concerning the diatoms, especially in the order Bacillariales, it is usually impossible to tell whether the cells of such species have been alive when sampled because of the preparation techniques (including the removal of cell contents) required for an accurate determination. Whereas the two previous lists were based to a large extent on our own unpublished information, in this list only additional published data has been included. Altogether the new list contains more than three times as much information as the earlier lists. Author citations have been made as complete as possible. In a complete author citation the Latin prepositions in and ex are frequently used. In indicates that the author has validly published a new taxon in another writer's work. The use of ex indicates that a name was invalid e.g. because an original description or type was not provided, but the situation was later corrected by the same or another author. In some cases the distinction between ex and in may be very fi ne, and requires careful study of the original publications, and sometimes even of the types, if indeed they exist any more. World War II appears to have destroyed many types. Where shorter citations are needed to save space, everything before ex and after in can be excluded, as well as the year of publication, unless nomenclatural or taxonomical changes are involved. Many journals require authorships to be cited either when the species occurs for the fi rst time in the text, or in a summarizing table covering all the organisms mentioned. In many routine cases merely a reference to an authoritative checklist may be enough. The fact that organisms included in the checklist have been described either as a plant according to the International Code of Botanical Nomenclature (ICBN), or as an animal according to the corresponding zoological code (ICZN), may in some cases give rise to problems. The botanical code requires a Latin diagnosis for a name to be valid, whereas ICZN does not. Thus the validity of the name of an organism sometimes depends on whether it is today considered to be a plant or an animal. Sometimes the usage or spelling of even valid names may vary (see e.g. Vørs 1992:370). In fl agellated organisms the use of two different codes is clearly a problem, when the same cell, depending on external factors, may behave as a plant (autotrophic, photosynthetic) or an animal (phagotrophic), or something in between (mixotrophic). |
Authors
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Hällfors, Guy |
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Contributors
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Publication Detail
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Publisher : Baltic Marine Environment Protection Commission - HELCOM, Helsinki Type : text Format : - |
Date Detail
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2004 |
Subject
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phytoplankton, cyanobacteria, cyanophyta, rhodophyta, cryptophyta, dinophyta, euglenophyta, haptophyta, chrysophyta, chlorophyta, zoomastigophora |
Coverage
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Relation
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Source
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Copyright Information
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Other Details
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Languages : eng |
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