Invasive Alien Species in Belgium: Bidens frondosa

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Bidens frondosa - Large-leaved beggarticks

French name:	Bident à fruits noirs
Dutch name:	Zwart tandzaad
Family:	Asteraceae

Group:	Vascular plants
Origin:	North America
Habitat:	terrestrial
Introduction:	accidental

ISEIA Score : 9

Naturalization in Belgium

First observation in the wild:	1886
Invasion stage:	stabilization
Spatial distribution:	widespread

Invasiveness

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

More on invasiveness: Bidens frondosa is an annual pioneer species of moist grounds; it colonises river banks, mud flats, ditches, ponds and other open alluvial habitats. Central achenes are morphologically adapted for long-distance dispersal by animals while fast-germinating peripheral ones have a lower dispersal capability.

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 (

freshwater habitats:

3270

Impacts on Species

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

Impacts on Ecosystems

Nutrient cycling:	unknown
Physical alteration:	unlikely
Natural successions:	unlikely
Food web alteration:	low

More on impacts: Dense stands of Bidens frondosa are likely to affect pioneer vegetation, namely the native Bidens tripartita and other pioneer nitrophilous plant species typical of muddy river banks. However, impacts on native vegetation seems to be rather limited and have not been well documented in the scientific literature.

Data Source & References

Authors:	Branquart Etienne, Vanderhoeven Sonia, Van Landuyt Wouter, Van Rossum Fabienne, Verloove Filip
Published on:	04 December 2007
Last update:	27 February 2019

References:

AEF (2006)

Cartes provisoires de la distribution de néophytes en Wallonie.

Unpublished document.

Brändel, M. (2004)

Dormancy and germination of heteromorphic achenes of Bidens frondosa.

Flora - Morphology, Distribution, Functional Ecology of Plants 199(3): 228-233.

Kasperek, G. (2004)

Fluctuations in numbers of neophytes, especially Impatiens glandulifera , in permanent plots in a west German floodplain during 13 years.

In: Kühn, I.& Klotz, S. (Eds.), Biological Invasions: Challenges for Science. NEOBIOTA 3: 27-37.

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.

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.

Toussaint, B. & Bedouet, F. (2005)

Les espèces végétales invasives des milieux aquatiques et humides du bassin Artois-Picardie.

Agence de l'Eau Artois-Picardie, 38 pp.

Toussaint, B., Mercier, D., Bedouet, F., Hendoux, F. & Duhamel, F. (2008)

Flore de la Flandre française

Centre régional de phytosociologie agréé Conservatoire botanique national de Bailleul.

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.

Wittenberg, R. (2005)

An inventory of alien species and their threat to biodiversity and economy in Switzerland.

CABI Bioscience Switzerland Centre report to the Swiss Agency for Environment, Forests and Landscape. The environment in practice no. 0629: 155p.