trié(s) par (Pertinence décroissant(e), Titre croissant(e)) 

Classification of European and Mediterranean coastal dune vegetation / Corrado Marcenò in Applied Vegetation Science, vol. 21, n°3 (Année 2018)

Public [article]  inApplied Vegetation Science > vol. 21, n°3 (Année 2018) . - pp. 533-559 Titre : Classification of European and Mediterranean coastal dune vegetation Type de document : texte imprimé Auteurs : Corrado Marcenò ; Riccardo Guarino ; Javier Loidi ; Mercedes Herrera ; Maike Isermann ; Ilona Knollová ; Lubomír Tichý ; Rossen Tzonev ; Alicia Teresa ; Rosario Acosta ; Una FitzPatrick ; Dmytro Iakushenko ; John A. M. Janssen ; Borja Jiménez-Alfaro ; Zygmunt Kacki ; Iva Keizer-Sedlakova ; Vitaliy Kolomiychuk ; John Rodwell ; Joop H. J. Schaminée ; Urban Šilc ; Milan Chytrý Année de publication : 2018 Article en page(s) : pp. 533-559 Langues : Anglais (eng) Catégories : [habitats/milieux] 16.2 - Dunes [ZG] Europe balkanique [ZG] Europe occidentale atlantique et méditerranéenne [Thèmes] Bassin méditerranéen [Thèmes] Côte atlantique Mots-clés : Ammophiletea  biogéographie  Honckenyo - Elymetea  Koelerio - Corynephoretea canescentis  phytosociologie  classification de la végétation Résumé : "Although many phytosociological studies have provided detailed local and regional descriptions of coastal dune vegetation, a unified classification of this vegetation in Europe and the Mediterranean Basin has been missing. Our aim is to produce a formalized classification of this vegetation and to identify the main factors driving its plant species composition at a continental scale." (source : auteurs) Type de publication : périodique Référence biblio : Marcenò C., Guarino R., Loidi J., Herrera M., Isermann M., Knollová I., Tichý L., Tzonev R., Teresa A., Acosta R., FitzPatrick Ú., Iakushenko D., Janssen J.-M., Jiménez-Alfaro B., Kacki Z., Keizer-Sedlakova I., Kolomiychuk V., Rodwell J., Schaminée J.-J., Šilc U., Chytrý M., 2018 - Classification of European and Mediterranean coastal dune vegetation. Applied Vegetation Science, 21 (3) : 533-559. DOI : 10.1111/avsc.1237 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=68326 [article]

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Czech National Phytosociological Database : Basic statistics of the available vegetation-plot data / Milan Chytrý in Preslia, vol. 75, n°1 (Année 2003)  

Public [article]  inPreslia > vol. 75, n°1 (Année 2003) . - pp. 1-15 Titre : Czech National Phytosociological Database : Basic statistics of the available vegetation-plot data Type de document : texte imprimé Auteurs : Milan Chytrý, Auteur ; Marie Rafajová, Auteur Année de publication : 2003 Article en page(s) : pp. 1-15 Langues : Anglais (eng) Mots-clés : bioinformatique  Czech Republic  plant community  phytosociologie  relevé  végétation  survey Résumé : "The vegetation relevés stored electronically in the Czech National Phytosociological Database arereviewed. The database was established in 1996, with the central database located in theDepartment of Botany, Masaryk University, Brno (www.sci.muni.cz/botany/database.htm). On 15November 2002 this central database contained 54,310 relevés from the Czech Republic, collectedby 332 authors between 1922–2002. Ca. 54% of the relevés were taken from published papers ormonographs, 21% from theses and the rest from various unpublished reports and field-books. Theserelevés include 1,259,008 records of individual plant species. Territorial coverage of the country bythe reléves is irregular as the areas with attractive natural or semi-natural vegetation are moreintensively sampled, with gaps in coverage of less attractive or poorly accessible areas. Mostrelevésareofbroad-leaveddeciduousforests(Querco-Fagetea),meadows(Molinio-Arrhenatheretea), dry grasslands (Festuco-Brometea), and marsh grasslands (Phragmito-Magnocaricetea). The quality of the data is discussed, such as researcher bias, preferentialselection of sampling sites, spatial autocorrelation and missing values for some data elements" Type de publication : périodique Référence biblio : Chytrý M., Rafajová M., 2003 - Czech National Phytosociological Database : Basic statistics of the available vegetation-plot data. Preslia, 75 (1) : 1-15. En ligne : http://www.preslia.cz/P031CChy.pdf Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66160 [article]

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Determination of diagnostic species with statistical fidelity measures / Milan Chytrý in Journal of Vegetation Science, vol. 13, n°1 (Année 2002)

Public [article]  inJournal of Vegetation Science > vol. 13, n°1 (Année 2002) . - pp. 79-90 Titre : Determination of diagnostic species with statistical fidelity measures Type de document : texte imprimé Auteurs : Milan Chytrý, Auteur ; Lubomír Tichý, Auteur ; Jason Holt, Auteur ; Zoltan Botta-Dukat, Auteur Année de publication : 2002 Article en page(s) : pp. 79-90 Langues : Anglais (eng) Résumé : "Statistical measures of fidelity, i.e. the concentration of species occurrences in vegetation units, are reviewed and compared. The focus is on measures suitable for categorical data which are based on observed species frequencies within a vegetation unit compared with the frequencies expected under random distribution. Particular attention is paid to Bruelheide's u value. It is shown that its original form, based on binomial distribution, is an asymmetric measure of fidelity of a species to a vegetation unit which tends to assign comparatively high fidelity values to rare species. Here, a hypergeometric form of u is introduced which is a symmetric measure of the joint fidelity of species to a vegetation unit and vice versa. It is also shown that another form of the binomial u value may be defined which measures the asymmetric fidelity of a vegetation unit to a species. These u values are compared with phi coefficient, chi‐square, G statistic and Fisher's exact test. Contrary to the other measures, phi coefficient is independent of the number of relevés in the data set, and like the hypergeometric form of u and the chi‐square it is little affected by the relative size of the vegetation unit. It is therefore particularly useful when comparing species fidelity values among differently sized data sets and vegetation units. However, unlike the other measures it does not measure any statistical significance and may produce unreliable results for small vegetation units and small data sets. The above measures, all based on the comparison of observed/expected frequencies, are compared with the categorical form of the Dufrêne‐Legendre Indicator Value Index, an index strongly underweighting the fidelity of rare species. These fidelity measures are applied to a data set of 15 989 relevés of Czech herbaceous vegetation. In a small subset of this data set which simulates a phytosociological table, we demonstrate that traditional table analysis fails to determine diagnostic species of general validity in different habitats and large areas. On the other hand, we show that fidelity calculations used in conjunction with large data sets can replace expert knowledge in the determination of generally valid diagnostic species. Averaging positive fidelity values for all species within a vegetation unit is a useful approach to measure quality of delimination of the vegetation unit. We propose a new way of ordering species in synoptic species‐by‐relevé tables, using fidelity calculations." Type de publication : périodique Référence biblio : Chytrý M., Tichý L., Holt J., Botta-Dukat Z., 2002 - Determination of diagnostic species with statistical fidelity measures. Journal of Vegetation Science, 13 (1) : 79-90. Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66163 [article]

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Development of distribution maps of grassland habitats of EUNIS habitat classification / Joop H. J. Schaminée (2016)  

Public Titre : Development of distribution maps of grassland habitats of EUNIS habitat classification Type de document : texte imprimé Auteurs : Joop H. J. Schaminée, Auteur ; Milan Chytrý, Auteur ; Jürgen Dengler, Auteur ; Stephan M. Hennekens, Auteur ; John A. M. Janssen, Auteur ; Borja Jiménez-Alfaro, Auteur ; Ilona Knollová, Auteur ; Flavia Landucci, Auteur ; Corrado Marcenò, Auteur ; John Rodwell, Auteur Editeur : Wageningen [Pays-Bas] : Alterra Année de publication : 2016 Importance : 144 p. + annexes Note générale : Report EEA/NSS/16/005 Langues : Anglais (eng) Catégories : [habitats/milieux] 3 - Landes, fruticées et prairies [ZG] Europe Mots-clés : carte de répartition  habitat  EUNIS Résumé : "This projects aims at parameterising the grassland units of the revised EUNIS habitat classification across Europe. Using the comprehensive plot dataset from the European Vegetation Archive (EVA), all grassland habitats (habitat group E) of Europe (including the coastal grey dunes, habitat subgroup B1.4) are formally defined with a unanimous floristic definition (with a new expert system approach, implemented in JUICE). For the 53 distinguished habitat types of grasslands sensu lato, for the first time lists of diagnostic, constant and dominant species are provided, based on statistical evaluation of the whole European dataset. Further, each of this habitats is presented with a distribution map based on the plots contained in EVA (ca. 250,000 georeferenced plots). Further cross-walks to the old EUNIS classification and the system used in the new European Red List of habitats are provided. All in all, the report represents the first consistent and data-based characterisation of grassland vegetation types on a level that roughly corresponds to phytosociological alliances (e.g. "E1.2a - Semi-dry perennial calcareous grassland" = Brometalia erecti; "E1.2b = Continental dry steppe" = Festucetalia valesiacae)." (source : auteurs) Type de publication : rapport d'études Référence biblio : Schaminée J.-J., Chytrý M., Dengler J., Hennekens S., Janssen J.-M., Jiménez-Alfaro B., Knollová I., Landucci F., Marcenò C., Rodwell J., 2016 - Development of distribution maps of grassland habitats of EUNIS habitat classification. Wageningen : Alterra, 144 p. + annexes. ID PMB : 64399 En ligne : https://www.researchgate.net/publication/311576694_Development_of_distribution_m [...] Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=64399

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Diversity of lowland hay meadows and pastures in Western and Central Europe / Maria Pilar Rodriguez-Rojo in Applied Vegetation Science, vol. 20, n°4 (Année 2017)

Public [article]  inApplied Vegetation Science > vol. 20, n°4 (Année 2017) . - pp. 702-719 Titre : Diversity of lowland hay meadows and pastures in Western and Central Europe Type de document : texte imprimé Auteurs : Maria Pilar Rodriguez-Rojo, Auteur ; Borja Jiménez-Alfaro, Auteur ; Ute Jandt, Auteur ; Heide Bruelheide, Auteur ; John Rodwell, Auteur ; Joop H. J. Schaminée, Auteur ; Philip Perrin, Auteur ; Zygmunt Kazcki, Auteur ; Wolfgang Willner, Auteur ; Federico Fernandez-Gonzales, Auteur ; Milan Chytrý, Auteur Année de publication : 2017 Article en page(s) : pp. 702-719 Langues : Anglais (eng) Résumé : "This analysis challenges the traditional concept of mesic grassland alliances separating hay meadows from pastures. New classification should be based mainly on the differences in management intensity rather than in management practice. Consequently, nutrient‐poor extensive pastures, which currently are not considered in the European Habitats Directive, should receive the same conservation attention as low‐intensive hay meadows, because both types of vegetation can be equally species‐rich and do not differ substantially in floristic composition from each other." Type de publication : périodique Référence biblio : Rodriguez-Rojo M., Jiménez-Alfaro B., Jandt U., Bruelheide H., Rodwell J., Schaminée J.-J., Perrin P., Kazcki Z., Willner W., Fernandez-Gonzales F., Chytrý M., 2017 - Diversity of lowland hay meadows and pastures in Western and Central Europe. Applied Vegetation Science, 20 (4) : 702-719. DOI : 10.1111/avsc.12326 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=65948 [article]

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Effects of different fidelity measures and contexts on the determination of diagnostic species / Wolfgang Willner in Journal of Vegetation Science, vol. 20, n°1 (Année 2009)

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EUNIS Habitat Classification : Expert system, characteristic species combinations and distribution maps of European habitats / Milan Chytrý in Applied Vegetation Science, vol. 23, n°4 (Année 2020)  

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Formalized reproduction of an expert-based phytosociological classification : A case study of subalpine tall-forb vegetation / Martin Ko?í in Journal of Vegetation Science, vol. 14, n°4 (Année 2003)

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Heterogeneity-constrained random resampling of phytosociological databases / Attila Lengyel in Journal of Vegetation Science, vol. 22, n°1 (Année 2011)

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Modified TWINSPAN classification in which the hierarchy respects cluster heterogeneity / Jan Rolecek in Journal of Vegetation Science, vol. 20, n°4 (Année 2009)

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OptimClass : Using species-to-cluster fidelity to determine the optimal partition in classification of ecological communities / Lubomír Tichý in Journal of Vegetation Science, vol. 21, n°2 (Année 2010)

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Root hemiparasitic plants are associated with high diversity in temperate grasslands / Pavel Fibich in Journal of Vegetation Science, vol. 28, n°1 (Année 2017)

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Statistical determination of diagnostic species for site groups of unequal size / Lubomír Tichý in Journal of Vegetation Science, vol. 17, n°6 (Année 2006)

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Stratified resampling of phytosociological databases : Some strategies for obtaining more representative data sets for classification studies / Ilona Knollová in Journal of Vegetation Science, vol. 16, n°4 (Année 2005)

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The Global Index of Vegetation-Plot Databases (GIVD) : a new resource for vegetation science / Jürgen Dengler in Journal of Vegetation Science, vol. 22, n°4 (Année 2011)

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Towards unification of national vegetation classifications : a comparison of two methods for analysis of large data sets / Heide Bruelheide in Journal of Vegetation Science, vol. 11, n°2 (Année 2000)

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Vegetation-plot data and databases in Europe : an overview / Joop H. J. Schaminée in Preslia, vol. 81, n°3 (Année 2009)  

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