Habitat overlap of the invasive impatiens parviflora DC with its native congener I. noli-tangere L.

Arnaud Vervoort, Anne Laure Jacquemart

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

Small balsam, or Impatiens parvifl ora, is one of the most invasive herbaceous alien species in European temperate forests, and is increasingly found in the same sites as its native congener I. noli-tangere. The aim of this study was to explore the habitat range of both species and determine whether overlap occurs. Vegetation surveys were conducted in 13 Belgian sites. We performed 139 relevés according to the following stratifi cation: pure plots of the invasive balsam, pure plots of the native balsam, mixed plots with both species and plots without either of the two species. Soil characteristics were analyzed (pH, organic matter, C/N ratio and cations) and Ellenberg indicator values were used for light and soil moisture. We assessed species affi nities for both Impatiens using indicator species analysis. Discriminant analysis was carried out to assign the sample plots to certain vegetation types. Vegetation and soil characteristics indicated that the species have considerable habitat overlap. This overlap is indicated by similar communities among relevés and by the failure of discriminant analysis to correctly assign plots. Populations of both Impatiens species are surrounded by an unsuitable habitat that probably limited their spread. In conclusion, we predicted that the alien balsam could spread rapidly with the help of human disturbance and transport, and could compete with the native congener.

langue originaleAnglais
Pages (de - à)249-257
Nombre de pages9
journalPhytocoenologia
Volume42
Numéro de publication3-4
Les DOIs
étatPublié - 1 déc. 2012
Modification externeOui

Empreinte digitale

Impatiens
discriminant analysis
cations
habitats
vegetation
temperate forests
carbon nitrogen ratio
vegetation types
indicator species
soil
soil organic matter
soil water
Impatiens parviflora
sampling

Citer ceci

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Habitat overlap of the invasive impatiens parviflora DC with its native congener I. noli-tangere L. / Vervoort, Arnaud; Jacquemart, Anne Laure.

Dans: Phytocoenologia, Vol 42, Numéro 3-4, 01.12.2012, p. 249-257.

Résultats de recherche: Contribution à un journal/une revueArticle

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