[article]
| Titre : |
What is the impact of Impatiens glandulifera on species diversity of invaded riparian vegetation ? |
| Type de document : |
texte imprimé |
| Auteurs : |
Martin Hejda, Auteur ; Petr Pysek, Auteur |
| Année de publication : |
2006 |
| Article en page(s) : |
pp. 143-152 |
| Langues : |
Anglais (eng) |
| Catégories : |
[ZG] République tchèque Use for events after 1992.
[Espèces (in biblio)] Impatiens glandulifera
|
| Mots-clés : |
plante invasive dominance |
| Résumé : |
"Effect of invasion by Impatiens glandulifera (Balsaminaceae) on the community characteristics and species composition of invaded riparian communities was studied at six rivers in the Czech Republic. Two approaches were used: space for time substitution approach, i.e., comparing invaded and uninvaded sites under the same habitat conditions, and removal of the invader from experimental plots. Differences in the number of species, Shannon diversity index H′ and evennes J were compared between invaded and uninvaded plots. Uninvaded plots of the comparative study harboured by 0.23 more species per 16 m2, and had higher value of H′ and J, calculated with species covers as importance values; however only the difference in J was marginally significant (p = 0.04). Other effects were not significant, indicating that once I. glandulifera is removed, communities recover without any consequences for species diversity. Multivariate analysis did not reveal any effect of invasion on the species composition in terms of species presence but their cover hierarchies changed after the invasion, as I. glandulifera became dominant at the expense of tall native nitrophilous dominants. It is concluded that I. glandulifera exerts negligible effect on the characteristics of invaded riparian communities, hence it does not represent threat to the plant diversity of invaded areas. This makes it very different from other Central European invasive aliens of a similar performance." (source : auteurs) |
| Type de publication : |
périodique |
| Référence biblio : |
Hejda M., Pysek P., 2006 - What is the impact of Impatiens glandulifera on species diversity of invaded riparian vegetation ? Biological conservation, 132 (2) : 143-152. |
| ID PMB : |
64785 |
| Permalink : |
http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=64785 |
in Biological conservation > vol. 132, n°2 (Octobre 2006) . - pp. 143-152
[article]
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trié(s) par (Pertinence décroissant(e), Titre croissant(e)) Affiner la rechercheWhat is the impact of Impatiens glandulifera on species diversity of invaded riparian vegetation ? in Biological conservation, vol. 132, n°2 (Octobre 2006)
