RT Journal Article T1 EUNIS Habitat Classification: Expert system, characteristic species combinations and distribution maps of European habitats A1 Chytry, Milan A1 Tichy, Lubomir A1 Hennekens, Stephan M. A1 Knollová, Ilona A1 Janssen, John A. M. A1 Rodwell, John S. A1 Peterka, Tomáš A1 Marcenò, Corrado A1 Landucci, Flavia A1 Danihelka, Jiří A1 Hájek, Michal A1 Dengler, Jürgen A1 Novák, Pavel A1 Zukal, Dominik A1 Jiménez-Alfaro, Borja A1 Mucina, Ladislav A1 Abdulhak, Sylvain A1 Aćić, Svetlana A1 Agrillo, Emiliano A1 Attorre, Fabio A1 Bergmeier, Erwin A1 Biurrun, Idoia A1 Boch, Steffen A1 Bölöni, János A1 Bonari, Gianmaria A1 Braslavskaya, Tatiana A1 Bruelheide, Helge A1 Campos, Juan Antonio A1 Čarni, Andraž A1 Casella, Laura A1 Ćuk, Mirjana A1 Ćušterevska, Renata A1 de Bie, Els A1 Delbosc, Pauline A1 Demina, Olga A1 Didukh, Yakiv A1 Dítě, Daniel A1 Dziuba, Tetiana A1 Ewald, Jörg A1 Gavilán García, Rosario Gloria A1 Gégout, Jean-Claude A1 Giusso del Galdo, Gian Pietro A1 Golub, Valentin A1 Goncharova, Nadezhda A1 Goral, Friedemann A1 Graf, Ulrich A1 Indreica, Adrian A1 Isermann, Maike A1 Jandt, Ute A1 Jansen, Florian A1 Jansen, Jan A1 Jašková, Anni A1 Jiroušek, Martin A1 Kącki, Zygmunt A1 Kalníková, Veronika A1 Kavgacı, Ali A1 Khanina, Larisa A1 Yu. Korolyuk, Andrey A1 Kozhevnikova, Mariya A1 Kuzemko, Anna A1 Küzmič, Filip A1 Kuznetsov, Oleg L. A1 Laiviņš, Māris A1 Lavrinenko, Igor A1 Lavrinenko, Olga A1 Lebedeva, Maria A1 Lososová, Zdeňka A1 Lysenko, Tatiana A1 Maciejewski, Lise A1 Mardari, Constantin A1 Marinšek, Aleksander A1 Napreenko, Maxim G. A1 Onyshchenko, Viktor A1 Pérez-Haase, Aaron A1 Pielech, Remigiusz A1 Prokhorov, Vadim A1 Rašomavičius, Valerijus A1 Rodríguez Rojo, María Pilar A1 Rūsiņa, Solvita A1 Schrautzer, Joachim A1 Šibík, Jozef A1 Šilc, Urban A1 Škvorc, Željko A1 Smagin, Viktor A. A1 Stančić, Zvjezdana A1 Stanisci, Angela A1 Tikhonova, Elena A1 Tonteri, Tiina A1 Uogintas, Domas A1 Valachovič, Milan A1 Vassilev, Kiril A1 Vynokurov, Denys A1 Willner, Wolfgang A1 Yamalov, Sergey A1 Evans, Douglas A1 Palitzsch Lund, Mette A1 Spyropoulou, Rania A1 Tryfon, Eleni A1 Schaminée, Joop H. J. A2 Schmidtlein, Sebastian AB Aim: The EUNIS Habitat Classification is a widely used reference framework for European habitat types (habitats), but it lacks formal definitions of individual habitats that would enable their unequivocal identification. Our goal was to develop a tool for assigning vegetation-plot records to the habitats of the EUNIS system, use it to classify a European vegetation-plot database, and compile statistically-derived characteristic species combinations and distribution maps for these habitats.Location: Europe.Methods: We developed the classification expert system EUNIS-ESy, which contains definitions of individual EUNIS habitats based on their species composition and geographic location. Each habitat was formally defined as a formula in a computer language combining algebraic and set-theoretic concepts with formal logical operators. We applied this expert system to classify 1,261,373 vegetation plots from the European Vegetation Archive (EVA) and other databases. Then we determined diagnostic, constant and dominant species for each habitat by calculating species-to-habitat fidelity and constancy (occurrence frequency) in the classified data set. Finally, we mapped the plot locations for each habitat.Results: Formal definitions were developed for 199 habitats at Level 3 of the EUNIS hierarchy, including 25 coastal, 18 wetland, 55 grassland, 43 shrubland, 46 forest and 12 man-made habitats. The expert system classified 1,125,121 vegetation plots to these habitat groups and 73,188 to other habitats, while 63,064 plots remained unclassified or were classified to more than one habitat. Data on each habitat were summarized in factsheets containing habitat description, distribution map, corresponding syntaxa and characteristic species combination.Conclusions: EUNIS habitats were characterized for the first time in terms of their species composition and distribution, based on a classification of a European database of vegetation plots using the newly developed electronic expert system EUNISESy. The data provided and the expert system have considerable potential for future use in European nature conservation planning, monitoring and assessment. PB Wiley SN 1654-109X YR 2020 FD 2020-07-17 LK https://hdl.handle.net/20.500.14352/97709 UL https://hdl.handle.net/20.500.14352/97709 LA eng NO Czech Science Foundation NO Gobierno Vasco NO Ministry of Science and Higher Education of the Russian Federation NO European Environment Agency to Wageningen Environmental Research NO Masaryk University DS Docta Complutense RD 6 abr 2025