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Demographic mechanisms of disturbance and plant diversity promoting the establishment of invasive Lupinus polyphyllus / Miia Jauni in Journal of plant ecology, 10 (3) (06/2017) 

Public Citation [article]  inJournal of plant ecology > 10 (3) (06/2017) . - 510-517 Titre : Demographic mechanisms of disturbance and plant diversity promoting the establishment of invasive Lupinus polyphyllus Type de document : Électronique Auteurs : Miia Jauni ; Satu Ramula Année de publication : 2017 Article en page(s) : 510-517 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Lupinus polyphyllus Lindl., 1827 Résumé : Aims : Community characteristics, such as disturbances and interspecific competition that affect the availability of microsites and resources, contribute to the success or failure of the establishment of exotic plant species. In particular, these two community characteristics may have adverse effects on plant emergence and survival, which are particularly important for population establishment and therefore it may be necessary to consider both these vital rates simultaneously when assessing demographic mechanisms. Here, we investigated the impacts of disturbance and interspecific competition on the establishment of a perennial invasive herb, Lupinus polyphyllus Lindl. Methods : Over the course of 2 years, we conducted an experiment in 10 populations of this species in Finland in which we manipulated the levels of soil disturbance. We recorded community characteristics (i.e. the number of vascular plant species, vegetation height, and the proportions of bare ground, litter and moss), and observed the emergence and survival of L. polyphyllus individuals in study plots. Important Findings : A mild disturbance (breaking the soil surface mechanically) slightly increased seedling emergence but did not affect plant survival. Instead, an intense disturbance (vegetation and litter removal) had no effect on seedling emergence, although it significantly increased the proportion of bare ground and, consequently, seedling survival. Survival was not affected by the height of the surrounding vegetation, but both seedling emergence and plant survival increased with an increasing number of plant species in the study plots. These findings demonstrate that single disturbance events may considerably promote the establishment of invasive herbs, although the overall effect and demographic mechanisms behind the increased establishment are likely to vary depending on disturbance type. Moreover, our results suggest that species diversity per se may not be a crucial mechanism for locally preventing the establishment of exotic plants. Lien pérenne : DOI : 10.1093/jpe/rtw049 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=143211 Jauni, Miia, Ramula, Satu 2017 Demographic mechanisms of disturbance and plant diversity promoting the establishment of invasive Lupinus polyphyllus. Journal of plant ecology, 10(3): 510-517.

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The invasive herb Lupinus polyphyllus can reduce plant species richness independently of local invasion age / Marju Prass in Biological invasions, 24 (2022) 

Public Citation [article]  inBiological invasions > 24 (2022) . - 425-436 Titre : The invasive herb Lupinus polyphyllus can reduce plant species richness independently of local invasion age Type de document : Imprimé Auteurs : Marju Prass ; Satu Ramula ; Miia Jauni ; D. Johan Kotze Année de publication : 2022 Article en page(s) : 425-436 Langues : Français (fre) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Résumé : The ecological impacts of invasive species may change or accumulate with time since local invasion, potentially inducing further changes in communities and the abiotic environment. Yet, time since invasion is rarely considered when investigating the ecological impacts of invasive non-native species. To examine the effect of time since invasion on the ecological impacts of Lupinus polyphyllus, a perennial nitrogen-fixing herb, we surveyed vascular plant communities in the presence and absence of L. polyphyllus in young, intermediate, and old semi-natural grassland sites (ca. 5, 10, 15 years representing both time since lupine invasion and plant community age). We analyzed vascular plant community composition, vascular plant species richness, and the cover of various ecological plant groups and L. polyphyllus. In contrast to our hypotheses, we found no change in the mean cover of L. polyphyllus (about 35%) with time since local invasion, and an ordination did not suggest marked changes in plant community composition. L. polyphyllus was associated with lower species richness in invaded plant communities but this effect did not change with time since invasion. Invaded plant communities were also associated with lower occurrence of generalist, oligotrophic (low-nutrient-adapted) and copiotrophic (nutrient-demanding) species but no temporal dynamics were detected. We conclude that even the intermediate cover of L. polyphyllus can reduce plant species richness, but the ecological impact caused by this invader might not dramatically change or accumulate with time since invasion. Lien pérenne : DOI : 10.1007/s10530-021-02652-y Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150018 Prass, Marju, Ramula, Satu, Jauni, Miia, Kotze, D. Johan 2022 The invasive herb Lupinus polyphyllus can reduce plant species richness independently of local invasion age. Biological invasions, 24: 425-436.

Documents numériques

Consultable Article (2022) URL