Invasive Alien Species in Belgium: Senecio inaequidens

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Senecio inaequidens - South african ragwort

NOBANIS EPPO CPS

French name:	Sénecon sud-africain
Dutch name:	Bezemkruiskruid
Family:	Asteraceae

Group:	Vascular plants
Origin:	Africa
Habitat:	terrestrial
Introduction:	accidental

ISEIA Score : 10

Naturalization in Belgium

First observation in the wild:	1892
Invasion stage:	spread
Spatial distribution:	widespread

Invasiveness

Reproduction in the wild:	yes
Dispersion potential:	high
Natural habitats:	high

More on invasiveness: Senecio inaequidens mainly thrives in ruderal and disturbed areas. It may be also found in rock outcrops, open grasslands and sand dunes. Minute achenes (3 mm) are mainly dispersed by wind, but also by water and animals at long distances.

Distribution in Belgium

Established populations Biogeographic areas where the species is known to be established in the wild

	absent from district
	isolated populations (1-5 localities per district)
	widespread (>5 localities per district)

Endangered areas Biogeographic areas including Natura 2000 habitats that are likely to be invaded by the species (occurence of dense populations)

Biogeographic areas including Natura 2000 habitats that are likely to be invaded by the species (occurence of dense populations)

	low risk
	medium risk
	high risk

Endangered Natura 2000 habitats (

grasslands:	611061206210*
rocky habitats:	8160*8110

Impacts on Species

Predation / Herbivory:	low
Competition:	medium
Disease transmission:	low
Genetic effects:	unknown

Impacts on Ecosystems

Nutrient cycling:	medium
Physical alteration:	medium
Natural successions:	medium
Food web alteration:	low

More on impacts: Senecio inaequidens does not demonstrably pose a threat to indigenous species or plant communities at present in Western Europe. The plant is toxic for livestock.

Data Source & References

Authors:	Branquart Etienne, Vanderhoeven Sonia, Van Landuyt Wouter, Van Rossum Fabienne, Verloove Filip
Published on:	11 July 2008
Last update:	22 December 2010

References:

AEF (2006)

Cartes provisoires de la distribution de néophytes en Wallonie.

Unpublished document.

CPS-SKEW (2006)

Polygonum polystachium.

From online fact sheets of the Swiss Commission for Wild Plants Conservation

Heger, T. & Böhmer, H.J. (2006)

Invasive alien species fact sheet Senecio inaequidens.

From online database of the North European and Baltic network on invasive alien species (NOBANIS).

Lambinon, J., Delvosalle, L. & Duvigneaud, J. (2004)

Nouvelle fore de la Belgique, du Grand-Duché de Luxembourg, du Nord de la France et des régions voisines.

Editions du Patrimoine du Jardin botanique national de Belgique, Meise.

Lohmeyer, W. & Sukopp, H. (2001)

Agriophyten in der Vegetation Mitteleuropas.

In: Brandes, D. (ed.) Adventivpflanzen. Beiträge zur Biologie, Vorkommen und Ausbreitungsdynamik von Archäophyten und Neophyten in Mitteleuropa, vol 8. Universitätsbibliothek Braunschweig, Braunschweig, pp 179-220.

Muller, S. (2004)

Plantes invasives en France : état des connaissances et propositions d'actions.

Publication scientifique du Museum d'Histoire naturelle, Patrimoines naturels n°62.

Van Landuyt, W., Hoste, I., Vanhecke, L., Van den Bremt, P. Vercruysse, W. & De Beer, D. (2006)

Atlas van de Flora van Vlaanderen en het Brussels gewest.

Nationale Plantentuin en het Instituut voor Natuur- en Bosonderzoek i.s.m. Flo.Wer vzw.

Verloove, F. (2006)

Catalogue of the Neophytes in Belgium (1800-2005).

Scripta Botanica Belgica 39, 89 pp.