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A limited number of species is sufficient to assign a vegetation plot to a forest vegetation unit / Lise Maciejewski in Applied Vegetation Science, vol. 25, n°1 (Année 2022)  

Public [article]  inApplied Vegetation Science > vol. 25, n°1 (Année 2022) . - e12650 Titre : A limited number of species is sufficient to assign a vegetation plot to a forest vegetation unit Type de document : texte imprimé Auteurs : Lise Maciejewski, Auteur ; Paulina E. Pinto, Auteur ; Stéphanie Wurpillot, Auteur ; Jacques Drapier, Auteur ; Serge Cadet, Auteur ; Serge Muller (1953-...), Auteur ; Pierre Agou, Auteur ; Benoît Renaux, Auteur ; Jean-Claude Gégout, Auteur Année de publication : 2022 Article en page(s) : e12650 Langues : Anglais (eng) Catégories : [habitats/milieux] 4 - Forêts [Thèmes] Natura 2000 [Thèmes] Végétation Mots-clés : classification de la végétation  unité de végétation  phytosociologie  système expert  végétation forestière Résumé : "Inventorying the habitats composing Natura 2000 sites is mandatory in the European Union and is necessary to implement relevant conservation measures. Vegetation plots, recording the presence or abundance of all plant species co-occurring within a plot, are currently used to identify terrestrial Natura 2000 habitat types, whose descriptions are mainly based on phytosociological units. However, vegetation plots are time-consuming and frequently restricted to the growing season. Moreover, no vegetation plots can be regarded as exhaustive, and significant inter-observer variation has been highlighted. We studied whether reducing the number of recorded species and the time spent carrying out a vegetation plot had an impact on vegetation unit assignment using species presence. We also studied if vegetation plots recorded in winter could be used for vegetation unit assignment." (source : auteurs) Type de publication : périodique Référence biblio : Maciejewski L., Pinto P., Wurpillot S., Drapier J., Cadet S., Muller S., Agou P., Renaux B., Gégout J.-C., 2022 - A limited number of species is sufficient to assign a vegetation plot to a forest vegetation unit. Applied Vegetation Science, 25 (1) : e12650. ID PMB : 70277 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/avsc.12650 Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=70277 [article]

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Classification of European bog vegetation of the Oxycocco-Sphagnetea class / Martin Jiroušek in Applied Vegetation Science, vol. 25, n°1 (Année 2022)

Public [article]  inApplied Vegetation Science > vol. 25, n°1 (Année 2022) . - e12646 Titre : Classification of European bog vegetation of the Oxycocco-Sphagnetea class Type de document : texte imprimé Auteurs : Martin Jiroušek, Auteur ; et al., Auteur Année de publication : 2022 Article en page(s) : e12646 Langues : Anglais (eng) Catégories : [habitats/milieux] 5 - Tourbières et marais [habitats/milieux] 52 - Tourbières de couverture [habitats/milieux] ZH - Zones humides [Thèmes] Classification des végétations [Thèmes] Végétation Mots-clés : approche Braun-Blanquet Résumé : "Aims Classification of European bog vegetation ( Oxycocco‐Sphagnetea class); identification of diagnostic species for the class and vegetation subgroups (orders and alliances); development of an expert system for automatic classification of vegetation plots; and production of distribution maps of the Oxycocco‐Sphagnetea class and its alliances. Location Europe. Methods A data set of vegetation‐plot records was compiled to include various bog types over most of the European continent. An unsupervised classification (beta‐flexible linkage method, Sørensen distance measure) and detrended correspondence analysis (DCA) ordination were applied. Formal definitions of syntaxa based on species presence and covers, and respecting the results of the unsupervised classification, were developed and included in a classification expert system. Results The Oxycocco‐Sphagnetea class, its two orders ( Sphagno ‐ Ericetalia tetralicis and Sphagnetalia medii ) and seven compositionally distinct alliances were formally defined. In addition to the syntaxa included in EuroVegChecklist, three new alliances were distinguished: Rubo chamaemori ‐ Dicranion elongati (subarctic polygon and palsa mires); Erico mackaianae ‐ Sphagnion papillosi (blanket bogs of the northwestern Iberian Peninsula); and Sphagno baltici ‐ Trichophorion cespitosi (boreal bog lawns). The latter alliance is newly described in this article. Conclusions This first pan‐European formalized classification of European bog vegetation partially followed the system presented in EuroVegChecklist, but suggested three additional alliances. One covers palsa and polygon mires, one covers Iberian bogs with endemics and one fills the syntaxonomical gap for lawn microhabitats in boreal bogs. A classification expert system has been developed, which allows assignment of vegetation plots to the types described." (source : auteurs) Type de publication : périodique Référence biblio : Jiroušek M., et al., 2022 - Classification of European bog vegetation of the Oxycocco-Sphagnetea class. Applied Vegetation Science, 25 (1) : e12646. ID PMB : 71511 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71511 [article]

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