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No performance reduction at the present northern edge of Ambrosia artemisiifolia L. invasion range
Ortmans, William; Chauvel, Bruno; Monty, Arnaud et al.
2014EWRS: 4th International Symposium on Environmental Weeds and Invasive Plants
 

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Keywords :
Ambrosia artemisiifolia; Invasive species; invasion; Range Edge; Range limit; performance; Ambroisie à feuilles d'armoise
Abstract :
[en] Plant populations at range edges may exhibit reduction of performances and fitness. In the case of biological invasions, such a reduction could be associated with a slowing down of the spread and explain the non-naturalization of a species outside its present invasion range. Common ragweed (Ambrosia artemisiifolia L.) is an ideal model to investigate such processes, since it is invasive in France but not naturalized in northern countries, such as Belgium and the Netherlands. In this study, we test if the performances of ragweed populations vary among different invasion zones. Three populations were selected in each of four invasion zones in Western Europe: 1) French invasion area; 2) northern and 3) southern invasion edges; and 4) outside the invasion area (Belgium and Netherlands). Field performances (growth, reproduction, stress resistance) were recorded on 25 plants per population. Furthermore, the competition by the native flora was assessed around each plant. Generalized Linear Models were used to compare performance among invasion zones and populations, with competition as covariate. Regressions were also performed to assess the influence of climatic data on population performances. No evidence of decreasing performances was found at the edges of the invasion area, neither outside of it, suggesting that the invasion front has the potential to keep going northwards. Competition by native flora had a significant impact on stress resistance, but did not decrease reproduction or growth. These results are discussed in the light of other ongoing experiments in Belgium.
Research center :
INRA - UMR agroécologie Dijon
Unité Biodiversité et paysage - Gembloux Agro-Bio Tech
Disciplines :
Environmental sciences & ecology
Author, co-author :
Ortmans, William ;  Université de Liège - ULiège > Forêts, Nature et Paysage > Biodiversité et Paysage
Chauvel, Bruno
Monty, Arnaud ;  Université de Liège - ULiège > Forêts, Nature et Paysage > Biodiversité et Paysage
Mahy, Grégory ;  Université de Liège - ULiège > Forêts, Nature et Paysage > Biodiversité et Paysage
Language :
English
Title :
No performance reduction at the present northern edge of Ambrosia artemisiifolia L. invasion range
Alternative titles :
[en] Pas de baisse de performance au Nord du front d'invasion de l'Ambroisie à feuilles d'armoise (Ambrosia artemisiifolia L.)
Publication date :
05 May 2014
Event name :
EWRS: 4th International Symposium on Environmental Weeds and Invasive Plants
Event organizer :
EWRS, ANSES, Montpellier SupAgro, MAAF-DGAI, USDA ARS-EBCL, CSIRO, Cirad, FCBN
Event place :
Montpellier, France
Event date :
du 19 au 23 Mai 2014
Audience :
International
References of the abstract :
Fried G., Bon M.-C., Brundu G., Brunel S., Chauvel B., Cheptou P.-O., Hatcher P.E., Haury J., Jourdan M., Kazakou E., Le Bourgeois T., Mandon-Dalger I., Marchante H., Mekki M., Müller-Schärer H., Novak S., Recasens J., Sforza R., Sheppard A., Taleb A. & Vitou J. (eds.) 2014: 4th International Symposium on Environmental Weeds and Invasive Plants. Abstracts. May 19 to 23, 2014. Montpellier SupAgro, Montpellier, France. 218 p.
Funders :
COST SMARTER (Sustainable management of Ambrosia artemisiifolia in Europe)
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 28 May 2014

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