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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

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Record number 523540
Title Classification of European beech forests : a Gordian Knot?
Author(s) Willner, Wolfgang; Jiménez-Alfaro, Borja; Agrillo, Emiliano; Biurrun, Idoia; Campos, Juan Antonio; Čarni, Andraž; Casella, Laura; Csiky, János; Ćušterevska, Renata; Didukh, Yakiv P.; Ewald, Jörg; Jandt, Ute; Jansen, Florian; Kącki, Zygmunt; Kavgacı, Ali; Lenoir, Jonathan; Marinšek, Aleksander; Onyshchenko, Viktor; Rodwell, John S.; Schaminée, Joop H.J.; Šibík, Jozef; Škvorc, Željko; Svenning, Jens Christian; Tsiripidis, Ioannis; Turtureanu, Pavel Dan; Tzonev, Rossen; Vassilev, Kiril; Venanzoni, Roberto; Wohlgemuth, Thomas; Chytrý, Milan
Source Applied Vegetation Science 20 (2017)3. - ISSN 1402-2001 - p. 494 - 512.
DOI https://doi.org/10.1111/avsc.12299
Department(s) Alterra - Vegetation, forest and landscape ecology
Nature Conservation and Plant Ecology
PE&RC
Publication type Refereed Article in a scientific journal
Publication year 2017
Keyword(s) Beech forest - Europe - Fagetalia sylvaticae - Fagion sylvaticae - Fagus sylvatica - Luzulo-Fagion sylvaticae - Syntaxonomy - TWINSPAN - Vegetation plot database
Abstract

Questions: What are the main floristic patterns in European beech forests? Which classification at the alliance and suballiance level is the most convincing?. Location: Europe and Asia Minor. Methods: We applied a TWINSPAN classification to a data set of 24 605 relevés covering the whole range of Fagus sylvatica forests and the western part of Fagus orientalis forests. We identified 24 ‘operational phytosociological units’ (OPUs), which were used for further analysis. The position of each OPU along the soil pH and temperature gradient was evaluated using Ellenberg Indicator Values. Fidelity of species to OPUs was calculated using the phi coefficient and constancy ratio. We compared alternative alliance concepts, corresponding to groups of OPUs, in terms of number and frequency of diagnostic species. We also established formal definitions for the various alliance concepts based on comparison of the total cover of the diagnostic species groups, and evaluated alternative geographical subdivisions of beech forests. Results: The first and second division levels of TWINSPAN followed the temperature and soil pH gradients, while lower divisions were mainly geographical. We grouped the 22 OPUs of Fagus sylvatica forests into acidophytic, meso-basiphytic and thermo-basiphytic beech forests, and separated two OPUs of F. orientalis forests. However, a solution with only two ecologically defined alliances of F. sylvatica forests (acidophytic vs basiphytic) was clearly superior with regard to number and frequency of diagnostic species. In contrast, when comparing groupings with three to six geographical alliances of basiphytic beech forests, respectively, we did not find a strongly superior solution. Conclusions: We propose to classify F. sylvatica forests into 15 suballiances – three acidophytic and 12 basiphytic ones. Separating these two groups at alliance or order level was clearly supported by our results. Concerning the grouping of the 12 basiphytic suballiances into ecological or geographical alliances, as advocated by many authors, we failed to find an optimal solution. Therefore, we propose a multi-dimensional classification of basiphytic beech forests, including both ecological and geographical groups as equally valid concepts which may be used alternatively depending on the purpose and context of the classification.

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