| 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 |
in Journal of Vegetation Science > vol. 22, n°4 (Année 2011) . - pp. 812-823
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