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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)
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Titre : Czech National Phytosociological Database : Basic statistics of the available vegetation-plot data Type de document : Livre Auteurs : Milan Chytrý, Auteur ; Marie Rafajová, Auteur Année de publication : 2003 Article en page(s) : pp. 1-15 Langues : Anglais 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 Ca. 54% of the relevés were taken from published papers ormonographs, 21% from theses and the rest from various unpublished reports and field-books.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
in Preslia > vol. 75, n°1 (Année 2003) . - pp. 1-15[article]Exemplaires
Cote Localisation Disponibilité aucun exemplaire 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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Titre : Vegetation-plot data and databases in Europe : an overview Type de document : Livre Auteurs : Joop H. J. Schaminée, Auteur ; Stephan M. Hennekens, Auteur ; Milan Chytrý, Auteur ; John Rodwell, Auteur Année de publication : 2009 Article en page(s) : pp. 173-185 Langues : Anglais Mots-clés : biodiversité eco-informatics Habitats Directive macroécologie nature conservation phytosociologie relevé TURBOVEG Résumé : "During the last decade many electronic databases of vegetation plots, mainly phytosociological relevés, were established in different European countries. These databases contain information which is extremely valuable for both testing various macroecological hypotheses and for nature conservation surveying or monitoring. The aim of this paper is to provide estimates of the number of vegetation plots there are in Europe, how many are stored in an electronic format and to assess their distribution across European countries and regions.We sent a questionnaire to the managers of national or regional databases of vegetation plots and other prominent vegetation ecologists. Meta-data obtained in this way indicate that there are > 4,300,000 vegetation-plot records in Europe, of which > 1,800,000 are already stored electronically. Of the electronic plots, 60% are stored in TURBOVEG databases. Most plot records probably exist in Germany, the Netherlands, France, Poland, Spain, Czech Republic, Italy, UK, Switzerland and Austria. The largest numbers of plots per unit area are in the Netherlands, Belgium, Denmark and countries of central Europe. The most computerized plots per country exist in the Netherlands (600,000), followed by France, the Czech Republic and the UK. Due to its strong phytosociological tradition, Europe has many more vegetation plots than any other part of the world. This wealth of unique ecological information is a challenge for future biodiversity studies. With the alarming loss in biodiversity and environmental problems like global warming and ongoing changes in land use, there is an urgent need for wide-scale scientific and applied vegetation research. Developments of information systems such as SynBioSys Europe and facilitation of data flow between the national and regional databases should make it easier to use these vegetation-plot data" Type de publication : périodique Référence biblio : Schaminée J.-J., Hennekens S., Chytrý M., Rodwell J., 2009 - Vegetation-plot data and databases in Europe : an overview. Preslia, 81 (3) : 173-185. En ligne : http://www.preslia.cz/P093Schaminee.pdf Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66161
in Preslia > vol. 81, n°3 (Année 2009) . - pp. 173-185[article]Exemplaires
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