Portail documentaire

Strategies for a successful plant invasion: the reproduction of Phragmites australis in north-eastern North America / Arnaud Albert in Journal of Ecology, 103 (2015) 

Public Citation [article]  inJournal of Ecology > 103 (2015) . - 1529-1537 Titre : Strategies for a successful plant invasion: the reproduction of Phragmites australis in north-eastern North America Type de document : Électronique Auteurs : Arnaud Albert ; Jacques Brisson ; François Belzile ; Julie Turgeon ; Claude Lavoie Année de publication : 2015 Article en page(s) : 1529-1537 Langues : Anglais (eng) Catégories : [Géographique] Amérique du Nord [Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Phragmites australis (Cav.) Trin. ex Steud., 1840 Résumé : Knowing the relative contribution of vegetative propagation and sexual reproduction to the dispersal and establishment of exotic plants is crucial for devising efficient control strategies. This is particularly true for the common reed (Phragmites australis), one of the most invasive species in North America. For the first time, we combined in situ field observations and genetic evidence, based on two genotyping techniques, that is microsatellite markers (SSR) and genotyping by sequencing (GBS), to determine the propagation strategies of this invader at its northern distribution limit in North America and especially in roadside ditches. Field observations revealed that, in a region where the common reed is already abundant, both seeds and plant fragments contributed to the establishment of new populations. Newly established individuals originated mostly (84%) from seeds rather than fragments, but a larger proportion of individuals originating from fragments survived the second year compared to seedlings. High genetic diversity among marsh and roadside common reed stands indicated the prime role of sexual reproduction for dispersal. The vast majority of genotypes were found in only one stand; such high genetic variability can only be explained by sexual reproduction. Half the surveyed stands comprised a single clone, suggesting that local expansion mainly occurred vegetatively. As the small proportion of SSR genotypes initially thought to be common between distant stands proved to be distinct (as revealed by GBS data), it is likely that all the stands examined were initially founded by genetically distinct individuals. Synthesis. Our study suggests that long-distance dispersal by seeds is important for the common reed, in marshes and roadsides, while both seeds and plant fragments contribute to short-distance dispersal along roads, at least in regions where the species is already abundant. The success of this invader in North America seems to be attributable to a reproduction strategy combining the advantages of sexuality with those of vegetative propagation. Moreover, this study shows that the GBS approach strongly reduces uncertainties associated with the use of a limited number of markers. This approach is especially valuable for ecologists dealing with an ever-increasing number of invaders, of which few have identified microsatellite markers. Identifiant pérenne : DOI : 10.1111/1365-2745.12473 Albert, A., Brisson, J., Belzile, F., Turgeon, J., Lavoie, C., 2015 - Strategies for a successful plant invasion: the reproduction of Phragmites australis in north-eastern North America ; Journal of Ecology, 103 : 1529-1537.

Documents numériques

Consultable Article (2015) URL

Structuring supply chains of native plant material of wild and local provenance in France / Stéphane Rivière in Nature-Based Solutions, 2 (December 2022) 

Public Citation [article]  inNature-Based Solutions > 2 (December 2022) . - 1-14 Titre : Structuring supply chains of native plant material of wild and local provenance in France : A contribution to ecological restoration and Nature-based solutions Type de document : Imprimé Auteurs : Stéphane Rivière (1972-) ; Damien Provendier ; Sandra Malaval ; Baptiste Sanson ; Johan Gourvil ; Arnaud Albert ; Jérôme Millet Année de publication : 2022 Article en page(s) : 1-14 Catégories : [Thématique] Restauration des écosystèmes [Thématique] Revégétalisation [Thématique] Végétal local [Thématique] Aménagement du paysage, génie écologique Résumé : European policies aim to simultaneously address the biodiversity and climate crises, partially through the implementation of nature-based solutions (NbS). In parallel, the 2021–2030 United Nations decade on Ecosystem Restoration and an increasing scientific community call for prioritising native species in ecological restoration programmes. In particular, the use of native plant material of wild and local provenance yields important benefits for agroecology, ecological restoration and urban environment management and fulfills five fundamental IUCN NbS criterias. Following a growing European initiative for the production and use of native plant material of wild and local provenance, the “Végétal local” trademark was created in 2015 in France. As part of its initiation, 11 bioregions were designed to guarantee the wild and local origin through controls on the traceability of plant material throughout its supply chain, i.e., from collection to trade. Such plant material has already been mainstreamed into NbS-related programmes and this article describes how this has helped deliver a range of NbS-related environmental and societal outputs. Project managers should continue to rely on native plant material of wild and local provenance to roll out further NbS programmes and meet their objectives. Identifiant pérenne : DOI : 10.1016/j.nbsj.2022.100035 Rivière, S., Provendier, D., Malaval, S., Sanson, B., Gourvil, J., Albert, A., Millet, J., 2022 - Structuring supply chains of native plant material of wild and local provenance in France: A contribution to ecological restoration and Nature-based solutions ; Nature-Based Solutions, 2 : 1-14.

Documents numériques

Consultable Article (2022) Adobe Acrobat PDF