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Comparing an exotic shrub's impact with that of a native life form analogue : Baccharis halimifolia vs Tamarix gallica in Mediterranean salt marsh communities / Guillaume Fried in Journal of Vegetation Science, vol. 22, n°4 (Année 2011)

Public [article]  inJournal of Vegetation Science > vol. 22, n°4 (Année 2011) . - pp. 812-823 Titre : Comparing an exotic shrub's impact with that of a native life form analogue : Baccharis halimifolia vs Tamarix gallica in Mediterranean salt marsh communities Type de document : texte imprimé Auteurs : Guillaume Fried, Auteur ; Dane Panetta, Auteur Année de publication : 2011 Article en page(s) : pp. 812-823 Langues : Anglais (eng) Catégories : [habitats/milieux] 15 - Marais salés, prés salés (schorres), steppes salées et fourrés sur gypse [Espèces (in biblio)] Baccharis halimifolia [Espèces (in biblio)] Tamarix gallica [Thèmes] Bassin méditerranéen Mots-clés : évaluation des risques  Couvert végétal  plante invasive  résistance biotique  seuil d'impact  emboîtement Résumé : "The magnitude of B. halimifolia impacts depended mainly on community type, with no differences between regions. Community structure (species richness, Shannon's diversity) declined linearly with increasing cover of B. halimifolia, with the most rapid decline in annual species. Native species cover fitted better with a cubic regression, with an impact threshold of around 86% cover of B. halimifolia. Impact of B. halimifolia on community diversity was higher than that of the native shrub T. gallica. While the magnitude of species composition changes was comparable for both shrubs, the higher nestedness component of dissimilarity found for B. halimifolia may indicate a higher short-term impact." (source : auteurs) Type de publication : périodique Référence biblio : Fried G., Panetta D., 2011 - Comparing an exotic shrub's impact with that of a native life form analogue : Baccharis halimifolia vs Tamarix gallica in Mediterranean salt marsh communities. Journal of Vegetation Science, 22 (4) : 812-823. Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66119 [article]

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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)

Public [article]  inJournal of Vegetation Science > vol. 22, n°4 (Année 2011) . - pp. 582-597 Titre : The Global Index of Vegetation-Plot Databases (GIVD) : a new resource for vegetation science Type de document : texte imprimé Auteurs : Jürgen Dengler, Auteur ; Robert K. Peet, Auteur ; Miquel De Caceres, Auteur ; Milan Chytrý, Auteur ; Jörg Ewald, Auteur ; Jens Oldeland, Auteur ; Gabriela López González, Auteur ; Manfred Finckh, Auteur ; Ladislav Mucina, Auteur ; John Rodwell, Auteur ; Joop H. J. Schaminée, Auteur ; Nick Spencer, Auteur Année de publication : 2011 Article en page(s) : pp. 582-597 Langues : Anglais (eng) Résumé : "The vegetation plot data in GIVD constitute a major resource for biodiversity research, both through the large number of species occurrence records and storage of species co‐occurrence information at a small scale, combined with structural and plot‐based environmental data. We identify shortcomings in available data that need to be addressed through sampling under‐represented geographic regions, providing better incentives for data collection and sharing, developing user‐friendly database exchange standards, as well as tools to analyse and remove confounding effects of sampling biases. The increased availability of data sets conferred by registration in GIVD offers significant opportunities for large‐scale studies in community ecology, macroecology and global change research." Type de publication : périodique Référence biblio : Dengler J., Peet R., De Caceres M., Chytrý M., Ewald J., Oldeland J., López González G., Finckh M., Mucina L., Rodwell J., Schaminée J.-J., Spencer N., 2011 - The Global Index of Vegetation-Plot Databases (GIVD) : a new resource for vegetation science. Journal of Vegetation Science, 22 (4) : 582-597. Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66162 [article]

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