An Expert System was prepared and applied to classify the whole data set of PVD and 1,340 relevés were organized at the class level. A set of formal definitions was established using a combination of logical operators of total cover of species in case of high-rank syntaxa while sociological species groups and cover of particular species were used for logical formulas describing class, alliances and associations. Unequivocal classification was applied in this work according to Cocktail method. Based on the literature and expert knowledge we selected 63 diagnostic species for the Isoëto-Nanojuncetea class. We used 69,562 relevés stored in Polish Vegetation Database. Formalized classification of ephemeral wetland vegetation (Isoëto-Nanojuncetea class) in Poland (Central Europe) PeerJ 9: e11703 įormalized classification of the class Isoëto-Nanojuncetea has not been performed in Poland. Cite this article Kącki Z, Łysko A, Dajdok Z, Kobierski P, Krawczyk R, Nowak A, Rosadziński S, Popiela AA. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited. Licence This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. 9 Institute of Biology, University of Szczecin, Szczecin, Poland DOI 10.7717/peerj.11703 Published Accepted Received Academic Editor Leonardo Montagnani Subject Areas Ecology, Ecosystem Science, Plant Science Keywords Syntaxonomical revision, Distribution, Eleocharition, Verbenion, Radiolion Copyright © 2021 Kącki et al.
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