|Water primrose||Status LU: n/a. 1st record: n/a|
|Groussbléieg Waasserprimmel||Status EU: established. IAS of Union concern (2016)|
|Jussie à grandes fleurs, Grande J.||RA: ISEIA: A0, Alert List. Harmonia+: 0,28|
|Großblütiges Heusenkraut||Wikipedia: | Wikispecies: | CABI|
|Waterteunisbloem||Back to the list of neophytes|
Ludwigia grandiflora (Michx.) Greuter & Burdet is an amphibious species living in ponds, lakes, ditches, channels and slow-running rivers as well as in humid meadows. It shows a high tolerance to different water levels. Its growth is favoured by water eutrophication but the plant is able to develop in oligotrophic environments. Invasive spread across watersheds is almost exclusively clonal and brought about by the dispersal of vegetative propagules by waterflow. Water primroses are highly detrimental to the environment in western Europe. They quickly develop and make very thick monospecific floating carpets at the surface of water bodies. They alter the physico-chemical quality of water (reduction of light and dissolved oxygen) and possess an allelopathic activity that influences the water quality throughout the year and reduces the germination and survival rates of other plant species. They outcompete most native water plants and create an anoxic environment detrimental to many plant and animal species. In addition, they modify water flow and cause wetland drying (Branquart et al. 2013).
Status and distribution in Luxembourg
Ludwigia grandiflora (Michx.) Greuter & Burdet has not yet been observed in Luxembourg.
A0 (3+3+2+3) = Alert List. First assessed 24 January 2019 by Manou Pfeiffenschneider and Christian Ries.
Overall risk score 0,28 = (Overall Invasion score 0,46 x Overall Impact score 0,62) (Ries et al. in prep.).
- Branquart, E., I. Stiers, S. Vanderhoeven, W. Van Landuyt, F. Van Rossum & F. Verloove, 2013. Harmonia database: Ludwigia grandiflora (Michx.) Greuter & Burdet. Harmonia version 1.2, Belgian Forum on Invasive Species. URL: http://ias.biodiversity.be [accessed on 2019-11-21]
- Ries, C., Y. Krippel & M. Pfeiffenschneider, [in prep.]. Risk assessment after the Harmonia+ protocol of invasive alien vascular plant species in Luxembourg.
Suggested citation of this webpage
Ries, C. & M. Pfeiffenschneider (Eds.), 2020. Ludwigia grandiflora (Michx.) Greuter & Burdet. In: neobiota.lu - Invasive Alien Species in Luxembourg. National Museum of Natural History, Luxembourg. URL: https://neobiota.lu/ludwigia-grandiflora/ [Accessed 2020-01-21].